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One of the vital components for the pebble reactor is the fuel handling system which was employed to load, recirculate and discharge the depleted fuel during the operation of reactor. The previous fuel handling design and experience of the High Temperature Reaktor 10 MWth (HTR-10) and HTR-PM were beneficial for the development of High Temperature Gas-cooled Reaktor (HTGR) in Indonesia such as for the Reaktor Daya Eksperiment (RDE) 10 MWth and PELUIT 150 MWth. One of the focus for the development especially for the control is an important factor to ensure that the reliability and the safety during operation were guarantee. Therefore, aims of this paper is to understand and develop the automatic control system of the fuel handling. The development was done by applying the logic flowchart of the fuel handling HTGR with the HTR-10 as the reference. Some modification was made considering the future application in Indonesia It was demonstrated that the automation systems with Programmable Logic Controller (PLC) can control handling systems easily because each valve can be drive to open and close immediately as requested from the sensor. It was also demostrated that the timing chart monitoring confirms the control of flowchart process description for the new fresh fuel loading. [ABSTRACT FROM AUTHOR]

Reliability program plan (RPP) for instrumentation and control (I&C) system with Field Programmable Gate Array (FPGA) technology for the system platform should develop to ensure the reliability of systems and components both hardware and software since reliability is one of mandatory requirement from the regulator and industrial standards of nuclear power generating station safety system. Therefore, it is very important to arrange which methodologies and tools that will be used to verification and validation (V&V) both hardware and software which is concerned as reliable I&C system since it is mandatory to meet the safety system criteria because have to handle the complex safety I&C system. This RPP should be designed by referring to the condition of the type of the reactor. To be applied on 10MW high temperature gas-cooled reactor-test module (HTR-10) which is a high temperature reactor with gas coolant system, the design should be conditioned for high temperature environment. This paper present the RPP to develop reliability analysis for FPGA-based I&C system of NPP to provide a minimum requirement to meet the reliability goal of the safety I&C system of HTR-10. It is mandatory to develop RPP since FPGA-based I&C system become an alternative platform to change Programmable Logic Controller (PLC) to avoid common cause failure because of software problems and cyber security aspects. In the process of reviewing recommended methods from industrial standards, it was found that the complexity of the system can increase the capabilities of the system, but from the other side show that by reducing the complexity of the system will increase the reliability of the system. By implementing this RPP to verify and validate the system development, hope that I&C system for HTR-10 will meet the safety criteria and reliable for safety I&C system. [ABSTRACT FROM AUTHOR]

The paper provides a system design proposal of multifunctional plant irrigation monitoring system which can achieve the automatic control for plant irrigation, enhance the irrigation effect efficiently in order to improve the deficiency of manual irrigation such as insufficient watering quantity and untimely watering. The system can achieve irrigating automatically without supervision, operate accurately and efficiently according to the temperature, humidity and illuminance which are required necessarily by plant. The environmental condition of plant growth can be gotten in real time by HMI. The consumption and usage frequency of water and nutrient solution for plant can be adjusted based on the different situation. The system can set up the fitting function, produce the irrigation strategy automatically which can be multiple and targeted. The irrigation strategy can be chosen conveniently and adjusted in real time. The flexibility and convenience of system operation can be enhanced [ABSTRACT FROM AUTHOR]

Aircraft fuselage docking is the key link of aircraft assembly. The traditional manual or semi-automatic docking process will lead to errors due to human factors and other factors. Therefore, this paper developed an aircraft fuselage docking control system based on PLC. First, the composition and working principle of the PLC control system were described, then the topology of the control system was analyzed, and the control structure of the system was established. Finally, the application of the system in the aircraft fuselage docking process was analyzed as an example [ABSTRACT FROM AUTHOR]

This paper presents a comparison of the two original architectures of programmable bit controllers built on FPGAs. Programmable Logic Controllers (which include, among other things programmable bit controllers) built on FPGAs provide a efficient alternative to the controllers based on microprocessors which are expensive and often too slow. The presented and compared methods allow for the efficient implementation of any bit control algorithm written in Ladder Diagram language into the programmable logic system in accordance with IEC61131-3. In both cases, we have compared the effect of the applied architecture on the performance of executing the same bit control program in relation to its own size. [ABSTRACT FROM AUTHOR]

This paper presents a procedure for the implementation of control algorithms for hardware-bit compatible with the standard IEC61131-3. The described transformation based on the sets of calculus and graphs, allows translation of the original form of the control program to the form in full compliance with the original, giving the architecture represented by two tick. The proposed method enables the efficient implementation of the control bits in the FPGA with the use of a standardized programming language LD. [ABSTRACT FROM AUTHOR]

An experimental platform for cryogenic Helium gas bearing turbo-expanders is established at the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. This turbo-expander experimental platform is designed for performance testing and experimental research on Helium turbo-expanders with different sizes from the liquid hydrogen temperature to the room temperature region. A measurement and control system based on Siemens PLC S7-300 for this turbo-expander experimental platform is developed. Proper sensors are selected to measure such parameters as temperature, pressure, rotation speed and air flow rate. All the collected data to be processed are transformed and transmitted to S7-300 CPU. Siemens S7-300 series PLC CPU315-2PN/DP is as master station and two sets of ET200M DP remote expand I/O is as slave station. Profibus-DP field communication is established between master station and slave stations. The upper computer Human Machine Interface (HMI) is compiled using Siemens configuration software WinCC V6.2. The upper computer communicates with PLC by means of industrial Ethernet. Centralized monitoring and distributed control is achieved. Experimental results show that this measurement and control system has fulfilled the test requirement for the turbo-expander experimental platform. [ABSTRACT FROM AUTHOR]

There are many pump and motor installations with quite extensive speed variation, such as Sago conveyor, heating, ventilation and air conditioning (HVAC) and water pumping system. A common solution for these applications is to run several fixed speed motors in parallel, with flow control accomplish by turning the motors on and off. This type of control method causes high in-rush current, and adds a risk of damage caused by pressure transients. This paper explains the design and implementation of a temperature speed control system for use in industrial and commercial sectors. Advanced temperature speed control can be achieved by using ABB ACS800 variable speed drive-direct torque sequential control macro, programmable logic controller and temperature transmitter. The principle of direct torque sequential control macro (DTC-SC) is based on the control of torque and flux utilizing the stator flux field orientation over seven preset constant speed. As a result of continuous comparison of ambient temperature to the references temperatures; electromagnetic torque response is particularly fast to the motor state and it is able maintain constant speeds. Experimental tests have been carried out by using ABB ACS800-U1-0003-2, to validate the effectiveness and dynamic respond of ABB ACS800 against temperature variation, loads, and mechanical shocks. [ABSTRACT FROM AUTHOR]

The Photon Factory control system was originally developed more than 20 years ago and has been upgraded several times. As a part of the straight-sections upgrade, which started in March, 2005, we renewed the control system incorporating modern technologies in both low-level and high-level control layers. In the low-level layer, a PLC (Programmable Logic Controller) is now intensively used for title safety control system, for RF klystron control boards and for the vacuum control system. In the middle-level and high-level layers, the EPICS (Experimental Physics and Industrial Control System) software toolkit was adopted. We also replaced VME-board computers with HP-RT operating system by Linux-based computers, which are now used as input/output controllers (IOCs) for the EPICS. The new system has been running without any serious problems since its commissioning in September, 2005. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

The BEPC(Beijing Electron-Positron Collider) is upgraded to be BEPCII, a two-ring Electron-Positron collider. Due to the construction of the BEPCII and upgrade of the existing front ends and beamlines, all the existing EPSs(Equipment Protection Systems) have to be redesigned and reconstructed at BSRF. All the redesigned EPSs for the upgrading front ends and beamlines are a PLC- and SCADA-based equipment protection and control and monitoring system. The EPSs are used to protect BEPCII two storage rings vacuum against vacuum failures in a beamline, as well as to protect the front-end and beamline components from being damaged by synchrotron radiation. For the high-power wiggler beam lines, a fast movable mask is used to protect the blade of a fast-closing valve from damage when the fast-closing valve is triggered to close, which does not need to dump the electron beam running in BEPCII outer ring. In addition, all redesigned PLC- based EPSs are used to communicate with the same centralized monitoring computer to monitor a variety of parameters from all PLC- based EPS systems. The monitoring computer runs the SCADA (Supervisory Control And Data Acquisition) software with its own web server. Graphical HMI interfaces are used to display a few overall views of all front-end equipment operation status and the further detailed information for each EPS in a different pop-up window. On the web services, the SCADA-based centralized monitoring system provides a web browse function, etc. The design of the reconstructed systems is described in this paper. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]