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• A newly developed ocean-based small modular reactor system is investigated from thermodynamic aspects. • Bifacial PV plant is integrated with hydrogen-based energy storage system. • Energy and exergy efficiencies are investigated for various cases. • A transient analysis is carried out. In this study, a novel nuclear and solar hybridized energy system with onshore and offshore components is designed, analyzed and assessed by using thermodynamic-based energy and exergy approaches. A high-temperature gas-cooled pebble bed reactor is considered in the floating nuclear plant to integrate with a bifacial photovoltaic (PV) plant in order to supply heat and electricity to four different communities. The process/waste heat and excess electricity are exploited via the thermochemical copper-chlorine hydrogen production cycle to store the energy in a chemical form. The offshore floating nuclear plant is integrated with an onshore energy system in various locations to be able to cover the needs more communities. As a case study, The cities, namely Iqaluit, Rankin Inlet, Pond inlet, and Cambridge Bay, in Nunavut, Canada, are investigated with thermodynamic-based analyses. A time-dependent thermodynamic analysis is carried out by using hourly meteorological data and a shift schedule due to the demands of those communities. The integrated system potentially designed for the city of Iqaluit consists of a 25 MW p bifacial PV plant, a polymer electrolyte membrane (PEM) fuel cell stack at 15 MW capacity, a 150 MW th offshore-based floating nuclear power plant, which is coupled to a copper-chlorine-based thermochemical cycle for hydrogen production. This integrated system, which is extensively analyzed thermodynamically under dynamic conditions, is able to produce a total of 1648 tons of hydrogen, 47,239 MWh of electricity and 75,900 MWh of heat in a typical meteorological year. For the floating nuclear plant's connected period, both energy and exergy efficiencies are found to be 24.5 % and 19.7 %, respectively. During the floating nuclear plant's disconnected period, the energy and exergy efficiencies are calculated as 39.9 % and 46.0 %, respectively. [ABSTRACT FROM AUTHOR]

• Bifacial PV plant is designed for the arctic environment. • HTR-type pebble bed reactor is integrated with the Cu-Cl cycle. • The integrated multigenerational system is investigated thermodynamically with energy and exergy approaches. • The proposed system is designed with different capacities for eleven indigenous communities in Nunavut Territory. In this study, a unique integrated system is developed to produce multiple useful outputs, including energy, fuel, and food, for indigenous communities to achieve sustainable development and address some of the sustainability goals developed by the United Nations in this regard. The Nunavut Territory is identified with the highest food and energy insecurity across Canada for the present study. A pilot project is, in this regard, developed under a case study and thermodynamically analyzed for Iqaluit, Nunavut as an Indigenous City. The high-temperature reactor (HTR)-type pebble bed nuclear reactors are considered to be used with the copper chlorine Cu-Cl hydrogen production cycle, bifacial photovoltaic (PV) plant, gas and steam turbines, greenhouse, fish farm and residential heating systems, and multi-effect water desalination in the integrated multigenerational system. The proposed system primarily produces electricity, district heating, fresh water, domestic hot water, and hydrogen fuel. The simulations are carried out on the PVsyst and Aspen Plus. The renewable and nuclear energy systems, as well as other subsystems, are assessed via the engineering equation solver (EES) software package. The proposed integrated system has achieved a 62.64% overall energy efficiency and a 68.91% overall exergy efficiency at the average ambient conditions. Moreover, the present system is designed in different capacities for eleven indigenous communities in Nunavut Territory by considering the energy resources and local demand. [ABSTRACT FROM AUTHOR]