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提出“数值燃料棒”概念,研究燃料棒多物理数值模拟技术,开发出相应的模型及程序。编制了基于有限元方法的热传导、力学计算模块和基于特征线方法(MOC方法)的中子输运计算模块,并进行验证。计算结果表明:相关计算模块的开发是有效的,可为进一步耦合求解燃料棒热传导问题、力学问题和中子输运问题,模拟燃料棒在反应堆内极端环境下的各种行为奠定基础。
Put forward the concept of “numerical fuel rod”, studied the multi-physics numerical simulation technology of fuel rods, and developed corresponding models and procedures. The heat conduction and mechanics calculation module based on the finite element method and the neutron transport calculation module based on the characteristic line method (MOC method) were developed and verified. The calculation results show that the development of the relevant calculation module is effective and it can lay a foundation for further coupling to solve the heat conduction problem, mechanics problem and neutron transport problem of the fuel rods and simulate the various behaviors of the fuel rods in the extreme environment of the reactor.