为开展深海铅铋堆热工水力及安全特性分析，本报告调研了物理、热工水力和燃料元件分析数学物理模型，用于开发深海超小型紧凑高效铅铋堆物理、热工和燃料元件分析程序；还调研了各程序的耦合接口模型，以综合考虑上述物理场之间的反馈交互作用，实现反应堆的高精度模拟。

In order to analyze the thermal hydraulic and safety characteristics of a deep-sea lead-bismuth reactor, mathematical physical models of physical, thermal hydraulic and fuel element analysis are investigated in this report for the development of a compact and efficient deep-sea physical, thermal and fuel element analysis program.The coupling interface model of each program is also investigated to comprehensively consider the feedback interaction between the above physical fields and realize the high precision simulation of the reactor.