CAJ | 학술논문

堆芯熔化严重事故下保证反应堆压力容器（RPV ）完整性非常重要，高温蠕变失效是堆芯熔化严重事故下反应堆压力容器的主要失效模式。在进行严重事故堆芯熔化物堆内包容（IVR）下RPV结构完整性分析中，RPV内外壁和沿高度方向的温度分布以及剩余壁厚是结构分析的重要输入。本文采用CFD分析方法对RPV堆内熔融物、RPV壁以及外部气液两相流动换热进行热-固-流耦合分析，获得耦合情况下的温度场、流场、各相份额分布以及RPV的剩余壁厚，为RPV在严重事故IVR下的结构完整性分析提供依据。
퇴심용화엄중사고하보증반응퇴압력용기（RPV ）완정성비상중요，고온연변실효시퇴심용화엄중사고하반응퇴압력용기적주요실효모식。재진행엄중사고퇴심용화물퇴내포용（IVR）하RPV결구완정성분석중，RPV내외벽화연고도방향적온도분포이급잉여벽후시결구분석적중요수입。본문채용CFD분석방법대RPV퇴내용융물、RPV벽이급외부기액량상류동환열진행열-고-류우합분석，획득우합정황하적온도장、류장、각상빈액분포이급RPV적잉여벽후，위RPV재엄중사고IVR하적결구완정성분석제공의거。
It is very important to remain the integrity of reactor pressure vessel (RPV ) in the core melt severe accident .The high temperature creep failure is the main failure mode for RPV in core melt severe accident .T he altitude distributions of outer and inner wall temperatures are important inputs for structure analysis .In this work ,the CFD method was used to carry out heat-solid-fluid coupled analysis of the corium in RPV , RPV wall and outer gas-water two-phase flow heat transfer . The temperature field , flow field , the fraction distribution of each phase in the coupled situation and the remaining thickness of the pressure vessel wall were obtained ,providing the support for analyzing the RPV structure integrity in severe accident the reactor corium in-vessel retention (IVR) .