FuelCell Energy's solid oxide electrolysis cell (SOEC) system is undergoing testing at the Idaho National Laboratory (INL) to explore the potential of hydrogen production in nuclear power plants. The project, partially funded by the U.S. Department of Energy, aims to demonstrate the system's ability to convert 100% of electricity and water into zero carbon hydrogen, showcasing the efficiency and cost-effectiveness of the technology. The testing involves the largest electrolyzer studied at INL, capable of producing 150 kilograms of hydrogen per day from 250 kilowatts of nuclear energy-generated electricity. By utilizing waste heat from the nuclear power plant, the system simulates 100% efficiency, highlighting the benefits of integrating nuclear power with FuelCell Energy's electrolyzer. FuelCell Energy's electrolyzer distinguishes itself by achieving 100% efficiency when paired with external heat sources like nuclear plants, reducing hydrogen production costs and enabling smart energy utilization. The system's modular design, small footprint, and scalability make it a practical solution for commercializing hydrogen production in nuclear power plants. The INL testing will explore real-world applications of the technology, including incorporating thermal energy from nuclear reactors, grid dynamics, and a nuclear reactor control simulator. The project aims to drive down costs, emissions, and leverage multiple energy sources to create a more sustainable energy ecosystem. Overall, the testing at INL showcases the potential for integrating FuelCell Energy's electrolyzer with nuclear power plants, offering a pathway to commercializing hydrogen production and enhancing the efficiency and profitability of nuclear energy.