Analysis of Radioactive Effect in Molten Salt Reactor
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摘要: 由于熔盐反应堆燃料熔盐的流动特性,堆芯内部物理过程呈现出强烈的耦合特性。基于有限元方法和离散坐标方法的耦合模拟,对熔盐反应堆内部的反应堆物理-热工水力-辐射传热过程进行了全耦合研究,着重分析了辐射效应对反应堆内部温度及流场的影响。数值模拟结果表明,虽然堆芯内部的辐射效应对于流动过程影响不大,但对反应堆内部的整体温度有明显的影响,尤其对堆芯出口位置影响明显。因此,在熔盐反应堆的设计及安全分析中,堆芯内部的辐射效应不能忽略。Abstract: Due to the flow characteristics of molten salt in molten salt reactor(MSR),the internal physical processes of this reactor show strongly coupling characteristic.This paper studied the coupled neutronics-thermo-hydrodynamic and radiative heat transfer processes in MSR by using finite element method and discrete-ordinate method.The influences of radiation effect on internal temperature and flow fields are analyzed particularly.Simulation results show that although the radiation process has little effect on the flow process,the influence of radiation process on overall temperature can be very obvious.Therefore,in the design and the safety analysis of MSR,the influence of radiation effect cannot be neglected.
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Key words:
- Molten salt reactor /
- Radiative heat transfer /
- Neutronics /
- Thermo-hydrodynamic /
- Multi-physics
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