Introduction   The increasing proportion of installed renewable energy, represented by photovoltaic and wind power, and the continuous decrease of coal power make the power grid's demand for high-quality regulation resources continue to increase and bring new pressure to the peak shaving of nuclear power. It is urgent to improve the peak shaving capability of nuclear power through system upgrading, so as to improve the utilization efficiency, system safety and economy of nuclear fuel.

    Method   The current situation of hydrogen energy preparation, storage, transportation and utilization was investigated and the suitable hydrogen energy storage technology route for nuclear power peak regulation was explored. Then the economic benefits of different hydrogen energy utilization technology routes were analyzed by taking the current operation situation of a nuclear power plant as an example.

    Result   Hydrogen production used surplus nuclear power can improve the utilization efficiency of nuclear power and has good economic benefits and application potential.

    Conclusion   With the improvement of technology and the reduction of equipment cost, hydrogen production using surplus nuclear power can not only improve the utilization efficiency of nuclear power units and obtain better economic benefits, but also contribute to the development of hydrogen energy industry. As a green energy with high energy density, hydrogen energy will play an extremely important role in energy saving and emission reduction and help achieve the goal of carbon neutrality.