Abstract: Abstract:nuclear power plant requires enormous hydrogen element, consumes large amounts of hydrogen, and has high demand on the reliability of hydrogen supply system. Currently the hydrogen supply system of domestic nuclear power plants adopt two type of schemes in general: hydrogen production and hydrogen purchase. Give example as third generation 2×1250MW nuclear power unit, in a nuclear power plant as case study subject, the researchers conducted a thorough comparative analysis on technical and economic factors and finally defined a technologically reliable, economically reasonable model of hydrogen supply system for nuclear power plants.

Key words: Keywords:nuclear power plant, hydrogen, hydrogen supply system