Tanbay, TayfunDurmayaz, Ahmet2026-02-122026-02-1220229786250008430https://hdl.handle.net/20.500.12885/654123rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022 -- 2022-06-26 through 2022-06-30 -- Istanbul -- 186176In this paper, the multiobjective optimization of a nuclear cogeneration plant for hydrogen production is carried out. The analysis focuses on the secondary cycle of a pressurized water reactor nuclear cogeneration plant providing process heat and electrical energy to a high-temperature steam electrolysis facility. The utopia point method is used to determine the values of heat/electricity energy ratio, hydrogen production capacity, live steam temperature and steam extraction node that yield a compromise optimum solution between thermal efficiency, thermal-to-hydrogen production efficiency, exergy efficiency and utilization factor. For a hydrogen production capacity of 7 kg/s, an energy ratio of 0.0561 results with the best overall performance, while an energy ratio of 0.10 gives the best performance for a capacity of 0.1 kg/s. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.enHigh-Temperature Steam ElectrolysisHydrogen ProductionMultiobjective OptimizationNuclearPWRConference Object3623642-s2.0-85147190851N/A