Search

Coal based thermal power plants contribute about ~ 72% of the power generation in India. Indian coal is of bituminous type, having a high ash content with 55–60% ash. Due to considerable environmental importance the collected fly ash has become a subject of worldwide interest in recent years. In the present study radon exhalation rate and the activity concentration of 226Ra, 232Th and 40K radionuclides in fly ash samples from Kasimpur Thermal Power Plant, Aligarh, Uttar Pradesh, India have been measured by 'Sealed Can technique' using LR-115 type II detectors and a low-level NaI (Tl)- based gamma-ray spectrometer, respectively. Radon exhalation rate has been found to vary from 57.1 ± 5.3 to 119.4 ± 7.7 mBq m−2 h−1 with an average value of 87.3 ± 5.8 mBq m−2 h−1. Activity concentration of 226Ra ranged from 20.0 ± 8.5 to 30.0 ± 9.7 Bq kg−1 with an average value 23.4 ± 9.0 Bq kg−1, 232Th ranged from 17.0 ± 9.9 to 69.0 ± 13.8 Bq kg−1 with an average value of 46.5 ± 12.1 Bq kg−1 and 40K ranged from 130.0 ± 7.2 to 332.0 ± 11.1 Bq kg−1 with an average value of 177.0 ± 8.1 Bq kg−1. [ABSTRACT FROM AUTHOR]

The paper presents a specific method of environmental impact assessment applied in Strategic Environmental Assessment (SEA) for the National Emission Reduction Plan (NERP) in the Republic of Serbia, based on air quality. The specificity of the approach is in the application of a semiquantitative method of multicriteria evaluation based on air dispersion modeling and the integration of SEA goals, indicators and criteria for assessing the impact of the NERP on the quality of air and other environmental elements in this method. When predicting changes in air quality for the planning horizon to 2028, the physical, geographical and climatic characteristics of the area were taken into account, as well as technical measures to reduce SO2 emissions, since this was the dominant pollutant from the Serbian coal-fired power plants studied by the NERP. Air pollution modeling was carried out using the AERMOD software package based on the data collected, and the quantitative results obtained were used in a multicriteria evaluation as part of the SEA. The results of the research indicated the importance of applying this approach in order to significantly increase objectivity in the SEA process, since it is an important element of decision making at the strategic level. In addition, a comparative presentation of the modeling results before and after application of the NERP was an important part of the SEA process, and it provided a clear insight into expected changes in the air quality. This is a key argument for making appropriate policy decisions on spatial, energy, environmental and socio-economic development in the Republic of Serbia, which, like other developing countries, is sluggishly following global trends in energy transition. [ABSTRACT FROM AUTHOR]

Several recently signed environmental agreements and protocols emphasize the global need to reduce GHG emissions, with a focus on limiting coal consumption due to high NOx and CO2 emissions. However, many countries, including those in the Western Balkans, rely heavily on coal for electricity generation. The outdated thermal power plant infrastructure in these regions poses a major challenge when it comes to meeting modern environmental standards while maintaining efficiency. This study is part of the more comprehensive research which aims to develop an expert system that utilizes existing measurements to estimate key parameters crucial for both energy production and pollution reduction. The focus is on Serbian thermal power plants, particularly plant Nikola Tesla unit B1. One of the critical parameters for optimizing thermal power plant control loops is the heating value of coal, which is challenging to measure in real time due to the coal's varying chemical compositions and caloric values. This paper examines 74 different parameters measured in 59 instances to estimate the hating value of coal at unit B1. Through detailed analysis and feature selection methods, including linear regression, this research aims to identify the most informative parameters for estimating the heating value of coal, which will improve the control system that enables more efficient and environmentally friendly power generation in coal fired thermal power plants. [ABSTRACT FROM AUTHOR]

The study deals with the possibilities of using alternative types of fuels to produce electricity. Power Plant Vojany (PPV) is a thermal power plant (TPP) in eastern Slovakia, which is part of the company Slovenské elektrárne, a. s. (SE). PPV primarily used black coal to produce electricity, which had to be imported from abroad (the Russian Federation). This activity has become inefficient both economically and environmentally, due to the high price of CO2 permits and the high emission factor of this type of fuel. PPV decided to co-combust biomass and refuse-derived fuel (RDF), which resulted in much better economic conditions due to their price, economic efficiency, and partly closed CO2 cycle. The aim of the paper is to explore the possibilities related to the production of energy in the cleanest possible way and with the least possible damage to the environment in coal thermal power plants using the example of operating Power Plant Vojany located in eastern part of Slovakia and to inspire each other for the modern transformation. For the purposes of hypothesis verification, analytical methods focused on overview studies of average fuel prices, comparisons, and the balance of fuels in connection with eliminated CO2 emissions, as well as municipal waste (MW) management in the EU and V4 countries, were used. The authors also focused on the energy recovery and combustion of MW and tracking the achieved CO2 savings in connection with the development of fuel sources in PPV. The results point to the fact that PPV is one of the power plants that could use biomass and RDF as fuel, which confirms the economic advantages of this procedure. The results confirm that the potential of RDF production in Slovakia is sufficient to ensure the operation of PPV at planned, even higher volumes of electricity production. The transformation to cleaner operation of coal thermal power plants represents a significant contribution of this study. [ABSTRACT FROM AUTHOR]

The frequency, intensity, and duration of extreme heatwaves are projected to increase in the global context of climate change. However, evidence of how anthropogenic emissions respond to heatwaves and further impact air quality remains elusive. Here, we use satellite remote sensing measurements alongside chemical transport model simulations to reveal abrupt variations in primary and secondary air pollutants introduced by extreme heatwaves. We highlight evidence from China and India, where satellite sulfur dioxide (SO2) and nitrogen dioxide (NO2) columns over thermal power plants enhance consistently responding to heatwaves. We attribute such spiked emissions to soaring electricity use and demonstrate that bottom‐up inventories underestimate the emissions from the power sector by 34.9% for the selected case. Elevated emissions facilitate fine particulate matter (PM2.5) and ozone (O3) formation over thermal power plants in an inhomogeneous manner, due to the combined effect of atmospheric oxidizing capacity, thermal decomposition of peroxyacetyl nitrate, planetary boundary layer rise, and air stagnation. Our results underscore the emerging challenge of pollution control attributable to the increasing climate penalty and the necessity of targeted control strategies and alternative energy sources during heatwaves. Plain Language Summary: Heatwaves are associated with high ambient temperatures and adverse health outcomes, but how anthropogenic emissions of atmospheric pollutants respond to heatwaves remains less explored. Here, we provide evidence from space for the first time that sulfur dioxide (SO2) and nitrogen dioxide (NO2) over thermal power plants enhance consistently responding to heatwaves. We attribute such spiked emissions to soaring electricity use, a feedback previously overlooked by state‐of‐the‐art emission inventories. The enhanced emissions increase levels of fine particulate matter (PM2.5) and surface ozone (O3) in an inhomogeneous manner during heatwaves due to the combined effect of chemistry and meteorology. Key Points: We detect enhanced SO2 and NO2 columns over power plants during heatwavesWe provide evidence of increasing electricity use and emissions in the power sectorElevated precursor emissions facilitate PM2.5 and O3 formation in an inhomogeneous manner under the combined effect of chemistry and meteorology [ABSTRACT FROM AUTHOR]

The present study aimed to examine elemental contamination near the residential areas of four coal thermal power plants in India. Water and surface soil samples were collected from various geographic sites around Chennai, Korba, Rupnagar, and Udupi power plants. The study identified aluminum (Al), arsenic (As), chromium (Cr), cobalt (Co), copper (Cu), cadmium (Cd), iron (Fe), lithium (Li), magnesium (Mg), manganese (Mn), mercury (Hg), nickel (Ni), zinc (Zn), and lead (Pb) in water and soil samples. Further, soil morphology was also studied using the SEM and EDX. Additionally, using non-cancerous and cancerous risk indices, human health hazards through consuming contaminated water and soil were estimated. Results indicated that Fe and Mn concentrations in water exceeded the standard limits, i.e., the Fe (0.36 mg/l) at site 2 (Chennai), 0.490 mg/l at site 1, and 1.907 mg/l at site 3 (Udupi), while Mn was found as 0.28 mg/l at site 4 (Chennai), 0.27 mg/l at site 3 (Udupi), and 1.52 mg/l at site 4 (Rupnagar). In the case of soil, the maximum metal concentration (mg/kg) was found in Rupnagar, followed by Chennai, Korba, and Udupi. The hazard index (HI) for non-cancerous and cancerous risks was found within the USEPA standard limits, indicating insignificant health risks to the adjoining population of coal thermal power plants. This study provides baseline information regarding the elemental composition in water and soil and the associated health risk status around Indian coal thermal power plants. [ABSTRACT FROM AUTHOR]

This study investigated the occurrence and distribution of rare earth elements (REEs), including 14 lanthanoids, scandium (Sc), and yttrium (Y), in groundwater around a large coal-fired thermal power plant (TPP). The ICP-MS technique was used to analyze 16 REEs in groundwater samples collected from monitoring wells. REE concentrations ranged from 59.9 to 758 ng/L, with an average of 290 ng/L. The most abundant was Sc, followed by La, accounting for 54.2% and 21.4% of the total REE concentration, respectively. Geospatial analysis revealed the REE enrichment at several hotspots near the TPP. The highest REE concentrations were observed near the TPP and ash landfill, decreasing with the distance from the plant and the landfill. REE fractionation ratios and anomalies suggested the Light REE dominance, comprising over 78% of the total REEs. Correlation and principal component analyses indicated similar behavior and sources for most REEs. Health risk assessment found hazard indices (HI) of 1.36 × 10−3 and 1.98 × 10−3 for adults and children, respectively, which are far below the permissible limit (HI = 1). Likewise, incremental lifetime cancer risks (ILCR) were all below 1 × 10−6. Nevertheless, ongoing ash disposal and potential accumulation in the environment could elevate the REE exposure over time. [ABSTRACT FROM AUTHOR]

Ash and slag waste (ASW) from coal combustion creates significant environmental and economic challenges. A promising method of ASW recycling is alkali activation with geopolymer material formation. This study investigates the influence of activating solution components (sodium hydroxide and sodium silicate) on the formation of porous geopolymers using ASW of different origins. The sodium hydroxide content of 0–4 wt.% and the sodium silicate content of 17–25 wt.% were studied. An increase in sodium hydroxide resulted in decreased density, but it adversely affected the strength. An increase in sodium silicate led to a compromised porous structure with relatively high density and compressive strength. An optimal composition, S19N3, comprising 3 wt.% of sodium hydroxide and 19 wt.% of sodium silicate obtained porous geopolymers with uniformly distributed 1.4–2 mm pores and a corresponding density of 335 kg/m3, a compressive strength of 0.55 MPa, a porosity value of 85.6%, and a thermal conductivity value of 0.075 W/(m·K). A mechanism for porous geopolymer formation was developed, including the interaction of alkaline components with ASW and a foaming agent, foaming, curing, and densification. The mechanism was examined using ASW from the Severodvinsk CHPP-1. This study allows for the optimization of geopolymer mixtures with various waste sources and the utilization of waste materials in the construction industry. [ABSTRACT FROM AUTHOR]

Coal mining has also been associated with adverse environmental and health impacts including cancer and respiratory disorders, with the presence of thermal power plants exacerbating the problem of heavy metal pollution. Minimal studies have been conducted on the environmental impacts, health risks, and bioaccessibility of heavy metals in coal mine areas. Consequently, samples of street dust were collected from different locations in the Singrauli mine complex and analysed. Heavy metals (Cu, Ni, Zn, Cr, Co, As, and Mo) were found to be higher than the background concentration, with the maximum concentration was found in areas close to the Thermal Power Plants, like Near Vindyachal TPP, Near Shakti Nagar TPP, and Anpara. The highest geo-accumulation index value was found for Co, Mo, Zn, and As, indicating moderate to strong pollution levels. Health risk assessment (for both adults and children) revealed that Cr and Fe posed significantly higher Hazard Quotient and Hazard Index (HI) values, indicating significant non-carcinogenic threats. Moreover, Carcinogenic Risk (CR) values for Cd, Cr, and Ni indicated a risk of carcinogenicity to the public exposed to road dust. The study also examined the bioaccessibility of the metals, which showed that the gastric phase accumulated a higher percentage of Ni (42.52%), Pb (34.79%), Co (22.22%), As (20%) and Cu (15%) than the intestinal phase. Strong positive correlation was observed between metal concentration (Cu, Pb, Cr, Fe, Zn, and Mn), HI, and CR of adult and child, while bioaccessibility of intestinal phase was positively correlated with gastric phase of metals (Cu, Ni, Co, As, and Mn). [ABSTRACT FROM AUTHOR]

Water samples were collected near the thermal power plant and coal mine (Gacko, Republic of Srpska, Bosnia and Herzegovina) and analyzed to measure the concentration of 33 parameters (pH, temperature, electrical conductivity, alkalinity as CaCO3, total hardness as CaCO3, total solids, total suspended matter, dissolved oxygen, oxygen saturation, biological oxygen demand, chemical oxygen demand with permanganate, ammonia, nitrite, nitrate, P, PAH, PCBs, phenolic index, mineral oils, detergents, content of As, Cd, Cr, Fe, Mn and Pb, sulfates, chlorides, fluorides, aerobic organotrophs, total coliforms, fecal coliforms and fecal streptococci). Determined average mean pH values and EC are within the reference values for class I surface water quality. The surface water in the study area is alkaline, with a mean pH value of 8.01. Depending on the location, other analyzed parameters correspond from I to V water quality classes. The ERI for As, Cd, Cr and Pb is low and for Mn is appreciable. The RI of the surface water in location 1 and 2 were moderate. In other locations, risk coefficients are low. [ABSTRACT FROM AUTHOR]

In recent years, there has been a focus on clean power generation, and it is critical to assess the environmental impact of novel technologies used in pollution control in power generation. The study uses life cycle assessment (LCA) to assess the environmental impacts of coal-fired thermal power plants with different emission control techniques in an Indian scenario. As there are no such studies available in the Indian context, this work might provide a holistic view of the impacts of energy generation. A supercritical coal-fired plant with a capacity of 660 MW is considered in this study. The system boundary included coal extraction, transportation, power plant operation, and transmission losses of electricity with a functional unit of 1 kWh. It was observed that there was an energy penalty due to the power consumed in emission control devices, but the maximum energy penalty was due to the power used in the carbon capture system. The LCA is done from "cradle to gate", with impact indicators at the mid-point evaluated using the RECIPE (H) 2016 LCIA method. LCA results showed that power plant operation is the most significant contributor to environmental impact. Initially, in cases 1 and 2, climate change (CC) potential was a major impact category, but CC potential was reduced with carbon capture and storage, 0.27 kg CO2 eq. in case 3 with ESP, FGD, SCR, and carbon capture and storage (CCS) and 0.263 kg CO2 eq. in case 4 with ESP and CCS. But there was a considerable increase in the majority of the impact categories in case 4. Freshwater consumption potential increased from 3.98 E−03 m3 in base case 1 to 4.98 E−03 m3 in case 3 due to the amount of water used in chemical production during CCS, as CC potential is a major concern in power generation, However, compared to case 1, the potential for climate change increased in case 2, whilst in case 4, the potential for climate change is lower but has resulted in an increase in the majority of impact categories. Case 3 shows an optimal approach to reducing CO2 emissions compared to other cases. The combination of ESP, FGD, SCR, and CCS is favourable for cleaner energy generation. [ABSTRACT FROM AUTHOR]

The pollution of upper soil horizons in the city of Gusinoozersk (the Republic of Buryatia) under the influence of emissions from the State District Power Plant (SDPP) working on brown coal from the Okino-Klyuchevskii deposit was studied. The contents of 14 elements (Sr, As, Co, Mo, Sb, V, Cu, Ni, Cr, W, Zn, Bi, Cd, and Pb) in bulk soil samples, as well as in the fraction of physical clay (particles with a diameter <10 µm, PM10) and in samples of brown coal and ash from the SDPP were determined. Priority pollutants of local soils (Urbic Technosols) are Sr, As, Co, Mo, Sb, and V; these elements tend to have higher concentrations in the PM10 fraction. The most contaminated area is the industrial zone of the city, where Sr, As, Co, V, Cu, Mo, Ni, and Cr contained in the fly ash of the Gusinoozersk SDPP tend to accumulate. A larger part of the territory (57% for bulk soils and 47% for the PM10 fraction) is characterized by a low level of pollution (Zc = 8–16). Arsenic poses the greatest environmental hazard; in the PM10 fraction, its concentrations exceed the maximum permissible concentration in 90% of the studied samples. The main factors controlling the accumulation of elements in soils and their PM10 fraction are the contents of iron and manganese oxides and organic matter, soil texture, acid–base conditions, and the location of sampling sites in the particular land use zones; these factors specify the formation of various classes of geochemical barriers. The polluting effect of brown coals depends on the contents of heavy metals and metalloids in them. A comparison of the chemical composition of the Okino-Klyuchevskii brown coal and fly ash from the Gusinoozersk SDPP with the Kansk–Achinsk coal and fly ash from the Central Thermal Power Plant (CTPP) of Severobaikal'sk indicates that the brown coal and ash from Severobaikal'sk are only slightly enriched in metals and metalloids, which significantly reduces their accumulations in soils. [ABSTRACT FROM AUTHOR]

Thermal power plants require water for their cooling system. Water availability is a limiting factor for electricity generation. The water footprint is a tool used to quantify water appropriation. Its blue component quantifies the volumetric water consumption by the cooling system, while the grey component can quantify the effect of the cooling water discharge in the water body. Several authors have estimated the blue water footprint of the cooling system, but only a few have assessed how the discharged water may affect the water body’s temperature. This paper assessed the thermal pollution produced by three Ecuadorian thermal power plants by estimating their grey water footprint. Results show that the grey water footprint can be up to three orders of magnitude larger than the blue water footprint of the plants, implying that the water bodies must have at least that volume of water to buffer the possible thermal pollution. [ABSTRACT FROM AUTHOR]

The article is devoted to the study of technical water used in thermal power plants. One of the devices of thermoelectric plant are heat exchangers, heat exchangers consist of pipes of different diameters. Heat exchangers used in production plants are made of carbon steel, suitable for high temperatures (up to 565 °C). At the same time inside the heat exchangers used for a certain period of time, a scale is formed in the form of a solid sediment, which reduces the thermal efficiency of heat carriers. Therefore, in this paper, the object of research are the heat transfer fluids of industrial heat exchangers, namely feed and process water. In order to obtain feed water at industrial thermal power plants, special water treatment processes are carried out. That is, its main purpose is to prevent the formation of solid deposits in heat exchangers. The studied water samples were taken directly from the thermal power plant from different stages of water treatment, i. e. raw water entering the chemical shop, treated water entering the deaerator, feed water entering the boiler. As a result of the study, water samples related to the formation of scale on the surfaces of heat exchangers, i. e. dosed amounts, elemental composition and particles were studied. During the study, hourly, daily and monthly dosages of reagents were determined. In addition, the elemental compositions of raw water, pure water and feed water of the thermal power plant were investigated. The results of this study allow to explore ways of economical and effective descaling formed in heat exchangers. [ABSTRACT FROM AUTHOR]

The capacity market is a response to potential capacity scarcity in the system. The missing money problem may occur as a result of the dynamic development of renewable energy sources because their capacity factors are significantly lower in comparison to those of conventional generating units. The capacity market is a response to capacity scarcity in dynamic growth in renewable energy sources with lower capacity factors than thermal power plants. It is a support mechanism that provides additional funds in order for generation companies to be ready to produce electricity in system stress events. So far, seven capacity auctions have been held for 2021-2027 delivery periods. Since the vast majority of capacity market units are coal-fired public thermal power plants and combined heat and power plants, the analysis of capacity auction results provides valuable findings on coal consumption in the years to come. With this in mind, the objective of the study is to investigate the potential of coal consumption resulting from the long-term capacity contracts signed thus far. For this purpose, a comprehensive analysis of the capacity auctions' results is conducted, including the analysis of the duration of the contracts, the structure of ownership, and fuels used in power units. The results show that the figures relating to the consumption of steam coal in units that have won capacity auctions are around 21,306 thousand Mg for 2023 and decreasing to 9,603 thousand Mg for 2035. Although European restrictions were introduced to limit remuneration for high-emission units, the long-term contracts ensure that these will remain in the system and will have an impact on the total consumption of steam coal in the medium- and long-term in the Polish power system. [ABSTRACT FROM AUTHOR]

Thermal power plants expel pollutants consisting of hazardous gases that result in degradation of environment and ecosystem, gasification technologies offer potential for clean and efficient energy. To address sustainable power production using coal-based thermal power plants, analysis for integration of fluidized bed gasifier with thermal power plants with varying gasifier pressure, air-fuel ratio, steam-fuel ratio and flue gas-fuel ratio has been carried out. Optimum performance at gasifier pressure of 2 bar and the steam-fuel ratio of 0.25 was observed with relative air-fuel of 0.075. With increasing flue gas-fuel ratio from 0.25 to 1.00, although the mole fractions of components of syngas don’t differ much, the heating value and cold-gas efficiency of syngas produced decreases for each fuel. Considering the emissions, simulated results present co-gasification as better option over conventional systems. A reduction of two-third in kg of CO2 released per kg of fuel was observed with almost three-fourth decrement in kg of CO2 per kWh of power produced. Also, zero SOx and NOx emissions were observed compared to coal based thermal power plants. Simulation of the gasification cycle with varying parameters is carried out using MATLAB. Results exhibit optimum performance of gasification system at gasifier pressure of 2 bar, air-fuel ratio of 0.1, steam-fuel ratio of 0.25 and flue gas-fuel ratio of 1.00. The proposed cycle presents itself suitable for further research and its application to coal based thermal power plants, providing potential towards supplementary power generation and cleaner exhaust. [ABSTRACT FROM AUTHOR]

In case of firing pulverized coal in power steam boiler certain fuel preparation process has to be taken in order to ensure stable and optimal combustion in boiler furnace. Before entering furnace low caloric coal is introduced from coal bunker to the coal preparation system where milling/pulverization and drying processes of raw large coal particles are conducted. For the purpose of defining fineness of grinding of pulverized coal mill gaseous mixture at mill outlet is introduced to the separator where large coal particles, separated from outgoing mill gaseous mixture, are recirculated to mill for regrinding. In this paper character of two-phase flow in inertial separator at milling plant in TPP Nikola Tesla Unit B under various operating conditions has been analyzed. The CFD approach has been used for calculating two-phase flow in separators flow domain. Measurement data taken on site along with results of performed heat balance calculations of milling plant have been used for validating calculation model as well as for setting appropriate boundary conditions in CFD model. The CFD calculations has been performed for different positions of all regulating flaps, recirculation rates of gaseous phase and values of specific weight of solid phase in two-phase mixture. For evaluating separators operating performance at different operating regimes changes of milling capacity and fineness of grinding of pulverized coal at separators outlet have been observed. Additionally, deviation rate of trajectories of different-sized particles to the streamlines of gaseous phase has been examined. [ABSTRACT FROM AUTHOR]

Coal-powered thermal plants are the primary source of energy production around the globe. More than half (56.89%) of the Indian power plants use coal for power production. Coal burning in power plants results in coal combustion residuals, which contain coal fly ash (CFA) that is recognized as principle by-product. CFA is difficult to characterize due to its broad compositional variation. Hence, the present article summarizes the various physical, chemical, mineralogical, and petrological characterizations of CFA to its use in different applications. Indian coal thermal power plants are found to release two types of CFA: F (fine) and C (coarse). CFA particles are identified as unburned carbon particles with a large fraction of silica oxides, alumina oxides, and iron oxides with a small fraction of calcium oxide (CaO). Morphologically, CFA particles are spherical, with large carbon molecules and a smooth texture surface. In terms of mineralogy; quartz, mullite, magnetite, and hematite are the dominant mineral phases of CFA and tend to be non-plastic, with permeability levels ranging from 8 × 10−6 to 1.87 × 10−4 cms−1. Petrographically, CFA is enriched in inertinite and liptinites as well as collotelinite, collodetrinite, and vitrodetrinite particles. Moreover, CFA is found to be composed of various organic and inorganic particles. By virtue of multiple characterizations, it has been utilized in several applications for decades, which is still quite limited. Therefore, current study aim to provide helpful insights into the potential use of CFA-derived products in different ways to increase sustainability. [ABSTRACT FROM AUTHOR]

The article presents the discussion on important for sustainable growth to all segments of citizens of our country. Topics include reducing profitability, and growing environmental concerns, and are taking different approaches to move away from coal; and allowing stranded assets to derive potential value and providing an effective exit strategy for utilities.

Combustion of coal in thermal power plants poses significant threat to surrounding ecology, by the release of harmful effluents. This study assesses the bio-thermal impact of emissions from Catalagzı Thermal Power Plant Region (CTPPR). A geospatial analytical framework has been modeled, utilizing satellite-based bio and thermal indicators. Average hazardous bio and thermal influence zones around CTPPR have been found to be 1465 m and 1380 m, respectively. Bio-influence zone extent depends upon a combination of meteorological factors, whereas, the bio-hazard severity depends mainly on atmospheric temperature. Thermal influence extent is inversely related to seasonal temperature, whereas corresponding severity depends upon local heat sinks as well. Collectively, hazardous bio-thermal influence in the surroundings of CTPPR shows spatial constancy over long term. The study concludes usefulness of satellite-based economical alternatives for monitoring area under stress around CTPPR for sustainable environmental management of ecological landscapes, needed to improve the human-environment nexus. [ABSTRACT FROM AUTHOR]

Copyright of Informatica (03505596) is the property of Slovene Society Informatika and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study aimed to estimate the environmental pollutants emitted from a thermal power plant's chimney. The power plant emission distribution during the 8-hour and average annual periods was modeled using the AERMOD and compared with national and international standards from December 22 2019 to September 21 2020. When the use of mazut fuel, the PM10, NOX, CO concentrations as fuel burn are less than the national and international standard. The maximum CO concentration at the 8-hour time interval is 0.15, which indicates power plants have a smaller share of CO emissions in an urban environment. [ABSTRACT FROM AUTHOR]

As point sources of pollution, thermal power plants (TPPs) emanate hazardous gaseous and particulate matter that are of significant detriment to surrounding biological landscapes. To provide support to ecological conservation and resource management in developing countries, this study aims to establish a cost effective and robust geospatial methodology for dynamic vegetation monitoring of local pollution zones around TPPs using passive satellite-based indicators. The extent and severity of hazardous bio-influence around four TPPs is identified and monitored for a period of 5 years, using vegetation indices (VIs). High correlations of vegetation health with distance from TPPs have also been identified, signifying the hazardous impact of TPP emissions to surrounding vegetation. Variations in behavior of zones of high pollutant concentration are observed both in space and time, as a response to local seasonal weather, nature of fuel used in TPP, and type and areal coverage of vegetation around the power plants. Winter and Monsoon seasons have been identified to create favorable conditions for sustaining high pollution concentration around TPPs, and hence, the extent of hazardous bio-influence zones in these seasons is maximum. Moreover, oil-based power plant is revealed to be associated with large radial zones of degraded vegetation around it and, therefore, poses greater ecological hazard than gas-powered TPPs. The average bio influence zone measured for the test sites has been found to be 1660 m that ranges from 1600 to 1730 m for different power plants, explaining variable behavior of the used fuel and surrounding vegetation conditions. In this way, the study stresses upon the importance of geospatial data and analytical frameworks in reliable and economical monitoring of environmental pollution associated with anthropogenic sources, using passive environmental indices derived from remote data. [ABSTRACT FROM AUTHOR]

Soil samples were collected near the thermal power plant and coal mine (Gacko, Republic of Srpska, Bosnia and Herzegovina) and analyzed to measure the concentration of 16 toxic metals (Pb, Cd, Cr, Ni, Zn, Cu, Hg, As, Mo, Co, Ba, V, Tl, B, S and F). The pollutant with the highest mean concentration was B (3,210.02 mg/kg), followed by the Ba (242 mg/kg), Zn (109.50 mg/kg), V (90 mg/kg), Ni (82.10 mg/kg), Cr (60.22 mg/kg), Cu (46.28 mg/kg), Pb (38.90 mg/kg) and Co (19.25 mg/kg). From the evaluation of the soil pollution indices (contamination factor (CF), pollution load index (PLI), ecological risk assessment (ERI), geoaccumulation index (Igeo) and degree of soil load), it can be seen that the studied soil samples in most cases are contaminated. CF values indicate that all values for Cu, Co, Ba and Va in all samplers, Ni in three samplers and Zn in one sampler indicate a moderate degree of contamination. In all soil samples, the values PLI indicates the presence of soil pollution. This study reveals that Ni for RI index is the toxic metal that poses the highest ecological threat. In according average values for Igeo for all toxic metals are >5, it can be concluded that the soil belongs to the class "extremely polluted". The values of degree of soil load for Ba and V load show that V class is a land of very high load (limit values in according of national legislation for Ba is 160 mg/kg and for V is 42 mg/kg). Values for Ni load show that IV class is a land of high loads (limit value 35 mg/kg). In accordance with the obtained results, it is necessary to prioritize the work on sustainable solutions to mitigate the current risks. [ABSTRACT FROM AUTHOR]

The increasing demand for electric power is an established trend in China, of which coal power accounts for a large proportion. This paper proposes an inventory hub location model considering multi‐type coal to minimize the total transportation and inventory cost in a multi‐coal‐power supply chain. A second‐order cone programming method is adopted to convert the original model. The exact solutions of the small‐scale real case show that the model can greatly reduce the total costs by CPLEX. For real‐world large‐scale cases, a customized greedy randomized adaptive search simulated annealing algorithm is devised and tested to obtain near‐optimal solutions within a reasonable time. The research has strong practical guiding significance for the management of the thermal coal supply chain. [ABSTRACT FROM AUTHOR]

Current work presents salient insights from energy audit of a 1050 MW thermal power plant by BEE Certified Energy Auditors. It provides insights into grassroot level data instead of relying only on theoretical calculations, unlike previously published literature. Arresting the air leakages in air-preheater has given total saving of 10.72 million kWh/year, saved 398,978.97 kJ/year, thus saving of 25,322.80 MT of coal/year. Upgradation of insulation resulted in total saving of 6632.208 Million kJ/year, i.e. saving of 510 MT/year of coal. Replacing cooling tower blades material proposed saving of 15,242.4 kWh/year. Installation of Variable Speed Drives for pumps provided saving of 274,836 kWh/year. Replacement of old inefficient pumps with energy efficient pumps has saving potential of 739,632 kWh/year. Pressure reduction in compressors has given saving of 344,794 kWh/year. Thus, in total, this energy audit helped to conserve 12.098 Million kWh & 25,832.80 MT coal/year and consequently, 104,243 tCO 2 /year. Such savings not only help the plant management/decision makers on the monetary front but also identify the avenues for improvement and channelize the resources such time and investment, prudently. Consequently, it has been established that energy audit is a pragmatic tool to achieve energy conservation at grassroot level. [Display omitted] • Energy audit of coal fired thermal power plant to identify significant energy saving potential with minimum investment. • Novel effort to provide fresh insights into air preheater leakage arrest as substantial energy saving avenue. • Saving of 12, 098, 293.30 kWh electricity/year. • Saving of 25,832.80 MT of coal/year. • Saving of 104,243 tCO 2 /year without hefty investment. [ABSTRACT FROM AUTHOR]

Heat and energy consumption is currently one of the largest environmental polluters. First of all, this is expressed in an increase in air pollution, poor quality of drinking water, soil pollution and the accumulation of certain types of waste. In order to reduce the harmful impact on the environment, it is necessary to solve the issues of effective purification and standardization of emissions and calculation of maximum allowable emissions. Therefore, the object of research is the impact of an industrial enterprise on the environment. One of the sources of environmental pollution is heat production enterprises, to which the Prydniprovska thermal power plant (Dnipro, Ukraine) belongs. The research is aimed at assessing the impact of the Prydniprovska thermal power plant (TPP) on the environment and develop proposals for the implementation of appropriate environmental measures. Like most industrial enterprises, Prydniprovska thermal power plant is a source of solid waste, polluted rains and gaseous emissions into the atmosphere. Since the enterprise is located within the city, the relevant environmental protection requirements for it have been increased. The economic activity of the enterprise is accompanied by the fulfillment of the requirements for the rational use of natural resources, environmental safety, planning measures for environmental protection and public health. In the work, an assessment was made of the impact of Prydniprovska thermal power plant on the environment and a description of the area where the enterprise was located was given. The analysis of these data allows to give recommendations on the choice of the type of treatment facilities and the requirements for them. As a result of the research, it can be concluded that the excess of the surface concentration for the main emitted substances was not recorded. In the future, the study of emissions from the Prydniprovska TPP can be carried out on other emitted harmful substances, as well as after the work on the modernization of treatment equipment. [ABSTRACT FROM AUTHOR]

The flue gas desulfurization (FGD) process eliminates Sulphur dioxides from flue gas produced by the combustion of fossil fuels in furnaces, boilers, and other sources. Limestone is an essential element for the FGD process in coal-fired thermal power plants. FGD system contributes efficaciously to the prevention of air pollution through its limestone/gypsum treatment in greater reliability, higher efficiency, and more capability. The selection of the limestone suppliers is thus a crucial task to improve environmental aspects and reduce cost. To optimize the selection of limestone suppliers, appropriate criteria determination and an effective solution approach are the central undertakings, which need to be made scientifically. Addressing the multi-criteria nature of the selection process, this study introduces a new Multi-Criteria-Decision-Making (MCDM) approach to evaluate supplier selection and deliver a group decision making (GDM) method in an ambiguous and fuzzy environment. The proposed method also takes decision makers' judgments into account in times of pressure, bias, and lack of expertise during the evaluation process. Consequently, this study, for the first time, integrates the Pythagorean Fuzzy Sets (PFSs), Simple Additive Weighting (SAW), and Evaluation Based on Distance from Average Solution (EDAS) under GDM setting. This paper, also for the first time, includes the analyses of an evaluation for the right supplier selection in a thermal power plant. A real case study from Turkey is applied to illustrate the validity of the proposed approach. Sensitivity analysis and comparison of the results with the existing techniques are also presented to verify the significance of the found outcome. [ABSTRACT FROM AUTHOR]

In Poland, there is a growing awareness of the need to change the sources of electricity and heat. An expression of this is the adoption of the document entitled Poland's Energy Policy until 2040 (PEP 2040) in February 2020 by the Council of Ministers. The goal of the Polish Energy Policy until 2040 is "energy security - ensuring the competitiveness of the economy, energy efficiency and reducing the environmental impact of the energy sector - taking into account the optimal use of own energy resources". In PEP 2040, the previous assumptions of the state's long-term energy policy were amended and an increase in the use of low- or non-emission sources was declared. In addition, the energy policy guidelines contain forecasts for the production of steam coal and the demand for this raw material. Based on the provisions of the document, as well as forecasts of the coal-production volume prepared by the authors and the assessments of experts in the fields related to energy and mining, the article contains considerations on the validity of the developed forecasts together with the determination of the production capacity of domestic mining enterprises in terms of covering the demand for steam coal used for the production of electricity and heat. It is planned, inter alia, that blocks of coal-fired power plants will be decommissioned and, in their place, there is to be the expansion of solar and wind energy and the commissioning of the first blocks of a nuclear power plant. Such activities, which cause a decrease in the demand for coal, are also related to the plans of changes in the functioning of mining enterprises - there will be successive closures of individual mines and mining plants. [ABSTRACT FROM AUTHOR]

The world is undergoing a massive energy transition. Over the next decades, there will be radical changes in the way we produce and consume energy. The conventional energy infrastructure being set up now would be abandoned ever before their economic life is over. A quarter of India’s population have no access to electricity and our per capita consumption of electricity is very low at almost one third of world average with millions getting power a few hours a day. Surprisingly the plant load factor (PLF) for thermal power plant have steadily declined over the last four years and was only 63.6% in Sep. 2015. Breakthrough in solar plant technology posed a challenge for fossil fuel based thermal power plants. In April 2017, the tariff of utility connected large solar power projects in India hit a record low of Rs.3/kWh. This is the same as the average tariff of coal based power. At this tariff, solar plants are cheaper than a large number of new and old coal fired power plants in India. Stringent pollution norms add to the cost of generation of thermal power. Several projects in the power sector have become unviable on account of states like Andhra Pradesh, Uttar Pradesh and Karnataka have either cancelled the power purchase agreement or reworking on them. Few more states may follow in cancellation of power purchase agreement (PPA). Distribution Companies (DISCOMS) are reluctant to sign PPA because of high tariff, demand uncertainties, long duration of PPA and need to take the responsibility of fixed charges for the life of PPA. This will lead to creation of non-performing asset (NPA) worth Rs.1.5 lakh crores and to the extent the bank loans will be at risk. Some mitigation measures are suggested to meet the challenges in operation of coal/lignite based thermal power plants. [ABSTRACT FROM AUTHOR]

The high temperature corrosion and wear of steels in coal based power plant at elevated temperature is the primary reason behind downtime in power generating plants. The failure of steel components is big hazard to the effectiveness of the power-plant and responsible for the economic loss. To counter the effect of environmental degradation on steels, the chemical composition has been improved and their microstructures are also modified. But these changes have provided limited protection to the steels. The other useful method to control the degradation of steels is to apply coating of the protective material on the surface of target metal with the help of thermal spray technology. In this article, a systematic study of literature has been done to understand the level of protection provided by the HVOF (thermal spray technique) sprayed coatings to the different steels employed in degrading environments in coal based power plant. This article may help to researchers to select the HVOF technique with best coating combination to resist the failure of steels in coal based power plants. [ABSTRACT FROM AUTHOR]

In this investigation, metals of environmental concern, Cd, Cr, Co, Pb and Cu, are identified in the feed coal of thermal power plant from eastern India. The concentrations (0.56–10.3 µg/g) of these metals are enriched (one- to twofold) in fly and bottom ash during combustion. Additionally, a noticeable presence of Cd, Cr, Co, Pb, and Cu was also observed on the surface (0.26–5.6 µg/l) and groundwater (0.12–2.65 µg/l) of the neighbouring power plant, which focuses on the contribution of combustion ashes in the water contamination of these elements. The analytical result shows that rainwater has a greater influence on the rapid transportation of these elements into the surface water than groundwater. The mobility of such metals of environmental concern from the combustion ashes into the surface and groundwater may pose a risk to the ecosystem. A regular monitoring of chemical quality of coal as well as expert dumping custom, chemical treatment before disposal and recycling of combustion residues are the essential steps for clean energy generation and safe environment. [ABSTRACT FROM AUTHOR]

The article presents the results of laboratory tests determining the concentration of rare earth elements (REE) in coal-burning wastes to assess their economic usefulness. The content of valuable elements was determined by the technique of inductively coupled plasma mass spectrometry (IC P-MS) in the material collected from three regions of southern Poland. A mixture of waste (including fly ash, furnace slag) from heat and power plants using coal for thermal transformation processes was an object for testing. Part of the research project was to identify a share of the rare elements in the collected samples with a selected grain class of <0.045 mm. [ABSTRACT FROM AUTHOR]

Ensuring the reliable operation of the dust fuel preparation system at thermal power plants (TPP) is a topical issue since it determines the energy strategy of any country that fires coals for thermal energy production. This unit is one of the most energy-intensive units in TPP. Those systems are outdated, poorly automated and high energy-intensive. Furthermore, they must ensure efficient and safe operation of the facility while being environmentally friendly. The current work focuses on the process of grinding coals in ball drum mills for further pulverized combustion. An experimental study was performed in order to determine the main factors (rotational speed of the drum mill, the degree of loading with the grinding balls, and the velocity of the supplied air) that affect the efficiency of the fuel preparation system. The obtained experimental data and performed mathematical modeling resulted in regression equations describing the energy performance of the mill. Three regression equations for mill productivity, power consumed, and specific surface area of the final product were obtained and validated. The study reveals that the lowest specific energy consumption is achieved when the relative rotational speed of the mill is between 0.81 and 0.87; the weighted average diameter of the balls ranges from 33.5 up to 34.5 mm; the load factor of the grinding media ranges from 0.325 up to 0.335, the supplied air velocity is between 0.2 and 0.3 m/s. The proposed methodology allows adjustment of the operating parameters of the grinding process to achieve the lowest energy consumption. The power consumption for the preparation can be reduced up to 5 % for the selected operation mode of the grinding facility [ABSTRACT FROM AUTHOR]

Purpose. Analysing the current state of sulfur dioxide and dust emissions from coal combustion at thermal power plants of Ukraine, predicting them with regard to changes which have occurred in the Ukrainian power industry over the last years, and estimating these emissions to compare with the limit gross emission values of pollutants according to the National Emissions Reduction Plan. Methodology. The method for calculating the pollutant emissions is elaborated, based on using the quantity of produced or supplied electricity for each year of TPP operation. Findings. It has been established that the gross emissions of SO2 at Ukrainian TPPs over the last years have amounted to about 620 thousand tons, and those of dust have made 140 thousand tons. In 2019, the average emission factors for all types of coal were 1180 g/GJ (for sulfur dioxide) and 288 g/GJ (for dust). The average values of specific emissions of SO2 and dust were 14.4 and 3.4 g/kWh of supplied electricity, respectively, as compared with 1.2 and 0.2 g/kWh, which are characteristic of the current level at coal TPPs of the EU countries. Originality. Analytic dependency has been established between SO2 emission factors in flue gas at coal TPPs and low heat value and sulfur and ash content for Ukrainian energy coal. Practical value. The developed method allows one to perform calculations of maximum permissible and predicted gross emissions of SO2 and dust at TPPs of Ukraine. [ABSTRACT FROM AUTHOR]

External cost or negative externality is a cost that a transaction or activity imposes on a party that is not part of the transaction or activity. In the present work, an attempt is made to calculate the external cost per unit of electricity generation from coal-based power plants in India due to the emissions of SO2, CO2, NOx and Particulate Matter. Purchasing Power Parity and population density correction factor are considered for the estimation of external cost to suit Indian economic and demographic conditions. Total external cost due to release of emissions from nine states having more coal-based power plants in India during the year 2018 is estimated to be INR 19.5 trillion and unit external cost of coal-based electricity generation is estimated to be INR 2.92. The cost of power generation from coal-based power plants in India with and without considering the external cost is estimated till the year 2030. Comparison is also made between the cost of solar power generation and coal-based thermal power generation. It is predicted that the cost of solar power generation without energy storage is cheaper than the power generation from coal-based power plants if the external cost of power generation is included in the cost. [ABSTRACT FROM AUTHOR]

The aim of the work is to predict 100% decarbonization of power plant's flue gases; to recover carbon from CO 2 in in-situ mode; to extract valuable metals from ash; and to process ash and converter slag into stone casting. The novelty of the work is the development of a system for the integrated processing of coal in a smelter reactor by using high-temperature off gases in a boiler; carbon splitting according to the formula CO 2 + 2Zn = 2ZnO + C, with the return of "C" to the system; sublimation of Zn from ZnO using a highly efficient counter-impacting jet method. Experiments carried out in a smelter have shown, the degree of reduction of germanium and zinc from slags ∼70%. The specific energy consumption is 2–3 times lower than in an acting analog. In a pessimistic scenario, the net profit of the system will be sufficient to purchase the missing electricity for the distillation unit: for the 60% carbonization of CO 2 , at the cost of electricity from wind turbines $46.3/MWh; in order to fully decarbonize CO 2 - $31.8/MWh. The system's payback period will not exceed 6–8 years, with the expected net profit of $21,660,860/y. The operating principle of the proposed system is as follows (see Figure 1). Fluxed ash is processed in melting unit 1 with the release of a melt suitable for the production of construction products; high-temperature gases from reactor 1 produce steam in boiler 2; CO 2 gases from boiler 2 are split in decarbonization chamber 3 in a steam-zinc flow according to the reactions: Zn + H 2 O ZnO + H 2 ; Zn + CO 2 ZnO + CO; CO + H 2 C + H 2 O; (ZnO, C)-concentrate is captured in an electric precipitator and fed to a distiller to restore zinc and the process is repeated; the distiller is heated with electricity from wind turbines; residual Zn-contained slag is fed to melting unit; gases purified from CO 2 are released into the atmosphere.1-melting reactor, 2-boiler,3-decarbonization chamber, 4-electric precipitator, 5-distillerFigure 1. Simplified diagram of CO2 decarbonization of boiler gases. [Display omitted] • For high ash coal processing, a combination "smelter-boiler' is proposed. • In-situ method for carbon splitting from CO 2 -gases by Zn is developed. • A design for Zn sublimation and condensation in one apparatus is suggested. • A method of Zn sublimation in an arc by counter-colliding jets is developed. • A condition of 100% decarbonization of the boiler's gases is predicted. [ABSTRACT FROM AUTHOR]

Nowadays, the disposing of coal bottom ash from thermal power plants is increasing day by day and creates serious environmental problems, especially in Vietnam. The utilization of coal ash from Vietnam's thermal power plants in a pavement base course has been attempted in this study. A total of 345 specimens in California bearing ratio, proctor compaction, compressive strength, resilient modulus, and splitting tensile strength test of bottom ash–cement, coarse aggregate–fly ash–cement, and local soil–fly ash–cement mixtures are investigated to find the mixtures that meet the technical requirements of the pavement base course. First, bottom ash was mixed with (3, 5, 7, 9, 11, and 13)% cement by weight. Second, coarse aggregates were mixed with 3% cement and (5, 10, 15, and 20)% fly ash by weight. Last, local soil was mixed with 5% cement and (5, 10, 15, and 20)% fly ash. Test results show that the optimal mixtures that have qualified properties for a pavement base course are mixtures of bottom ash + 11% cement, coarse aggregates + 20% fly ash + 3% cement, and local soil + 10% fly ash + 5% cement. These results demonstrate that Vietnam's coal ash can be reused in a base course pavement. [ABSTRACT FROM AUTHOR]

This study evaluated the characteristics and mechanism of phosphate adsorption by fly ash discharged from a biomass thermal power plant (BTP-FA) under various environmental conditions in order to increase the recyclability of BTP-FA. The phosphate adsorption properties of BTP-FA and fly ash derived from coal thermal power plant (CTP-FA) were better matched by those predicted by the Langmuir isothermal model and the pseudo-second-order model, and their maximum adsorption capacities were 62.1 and 4.1 mg/g, respectively. It was found that the adsorption of phosphate by BTP-FA was predominantly influenced by the outer boundary layer rather than the inner diffusion in the pores. The phosphate adsorption process by BTP-FA was greatly influenced by the initial pH and the BTP-FA dose. Therefore, to effectively treat phosphate using BTP-FA, the concentration and flow rate of phosphate in the incoming wastewater must be considered. The concentration of dissolved calcium from BTP-FA decreased sharply during the phosphate adsorption process compared to that in the phosphate-free solution. This was thought to be due to surface adsorption/reaction between calcium and phosphate. The SEM–EDS and FTIR results also supported the surface adsorption/precipitation reaction of Ca-P. Recycling fly ash discharged from biomass power plants as phosphate adsorbents is expected to contribute not only to waste reduction, but also to wastewater purification. [ABSTRACT FROM AUTHOR]

In this paper, the combined wind and thennal power plant systems are operated optimally to reduce the total fossil fuel cost (TFFC) of all thennal power plants and supply enough power energy to loads. The objective of reducing TFFC is implemented by using antlion algoritlun (ALA), particle swarm optimization (PSO) and Cuckoo search algoritlun (CSA). The best method is then detennined based on the obtained TFFC from the tlu·e.e methods as dealing with two study cases. Two systems with eleven units including one wind power plant (\VPP) and ten thennal power plants are optimally operated. The two systems have the same characteristic of MFSs but the valve foading effects (VLEs) on thennal power plants are only considered in the second system. The comparisons of TFFC from the two systems indicate that CSA is more powerful than ALA and PSO. Fmthennore, CSA is also superior to the two methods in tenns of faster search process. Consequently, CSA is a powerful method for the problem of optimal generation for wind-thennal power plant systems with consideration ofMFSs from thermal power plants. [ABSTRACT FROM AUTHOR]

Alternative technologies in combination with thermal power plant allow the production of heat, electricity and hydrogen using renewable energy sources in combination with gas or coal, as a very important energy source in traditional energy engineering in Slovenia. The technologies aim, inter alia, to reduce greenhouse gas emissions, increase the use of renewable energy sources and take a step forward to the production of hydrogen as an alternative energy source in numerous applications. In view of the estimated demand for heat, electricity and hydrogen in the Savinja-Šalek region, Slovenia, the technologies to meet such demand are proposed in this article from a technical perspective. An energy and economic analysis of the operation of the Thermal Power Plant (TPP) will be done. The TPP is operating in a variable operating regime. The possibility of stationary operation of the power plant will be analysed, the surplus of produced electricity will be used for the hydrogen production. The process is based on the Rankine-Clausius cycle (RC) with dual superheating using water or steam as the working media. The idea in this article, is to generate in the above mentioned facility as much hydrogen, heat, cold and electricity as needed by the Savinja-Šalek region in industry, transport, etc. Thus, the power plant could operate optimally, constantly at 100% of power, which would allow simultaneous production of electricity, heat and hydrogen. Hydrogen could be used for sale on the market or for the electricity production or for heating. Hydrogen could be produced via electrolysis or thermochemical process. In the second part of article, the analysis of RC with concentrated solar energy and wood chips was analysed. [ABSTRACT FROM AUTHOR]

Necessary measures should be taken to ensure that the energy is uninterrupted in coal-fired thermal power plants. For this reason, in the study, 100 accident reports that occurred in 13 units between 2016-2019 at the X coal-firedpower plant were analyzed. The causalfactors of these accidents were analyzed statistically and classified using the human factor analysis and classification system (HFACS) method. As a result of the study, the accidents that occurred in 13 units were analyzed according to the HFACS category in the tables and it was concluded that most of them were caused by inadequate management. [ABSTRACT FROM AUTHOR]

In the present study, indoor radon (222Rn), thoron (220Rn), radon progeny (214Po) and thoron progeny (212Po) activity concentration have been measured in a region around the National Capital Power Station, Dadri, Uttar Pradesh, India. The mean values of the 222Rn, 220Rn and their progeny in the studied region are found to be 22.1 ± 10.0 Bqm−3, 48.6 ± 13.5 Bqm−3, 8.8 ± 4.8 Bqm−3 and 0.49 ± 0.15Bqm−3 respectively. The annual inhalation dose estimated from the observed concentrations varies from 0.29 ± 0.04 to 2.06 ± 0.121 mSv with a mean value of 0.75 ± 0.32 mSv and is well within the reference level. It has also been observed that 212Po is a significant contributor (= 18.7%) to the total annual inhalation dose. Seasonal variations of 222Rn, 220Rn, and their progeny have also been reported. [ABSTRACT FROM AUTHOR]