海洋核动力平台乏燃料贮存格架设计及安全分析研究

针对海洋核动力平台乏燃料组件海上长期贮存所面临的安全保证问题，通过改进燃料组件与贮存小室之间固定形式、优化贮存小室与贮存格架本体之间连接形式以及增加贮存格架与乏燃料水池池壁之间的缓冲结构，设计了一种满足设计基准以及适应海洋环境的乏燃料贮存格架，并采用蒙特卡罗程序MCNP-5、计算流体力学软件Fluent 14.0、有限元分析软件ANSYS 17.0对该贮存格架进行临界、热工、结构仿真计算。结果表明，该贮存格架设计合理、安全性高，可为海上浮动式核电站乏燃料贮存提供解决方案。 

Study on Design and Safety Analysis of Spent Fuel Storage Grid for Marine Nuclear Power Platform

For the problem in the safety assurance for long-term maritime storage of spent fuel for marine nuclear power platform, this paper improved the fixed form between the fuel assembly and the storage cell, optimized the connection form between the storage cell and the spent fuel storage grid frame body, and added a buffer structure between the spent fuel storage grid and the wall of the spent fuel pool. In this way, a spent fuel storage grid meeting the design criteria and adapting to the marine environment is designed. Monte Carlo code MCNP-5, computational fluid dynamics (CFD) software Fluent 14.0 and finite element analysis software ANSYS 17.0 are used to simulate the criticality, the thermal hydraulics and the structural of this storage grid. The results show that the design of the storage grid is reasonable and safe. Therefore, the spent fuel storage grid designed in this study can provide a solution for the maritime storage of spent fuel in floating nuclear power plants.