严重事故IVR下反应堆压力容器稳态温度场计算

摘要

In -Vessel Retention (IVR) is an important and crucial method for preventing and mitigating the consequences of severe accident. According to energy balance equation, as well as different material propertity and reactor cavity flooding are summarized. Temperature distribution of reactor pressure water is obtained under steady condition. The results indicate that the vessel can ensure its integrality under external reactor vessel cooling and the implementation of IVR in advanced pressurized water reactor is successful from the perspective of thermal load.%在发生堆芯熔化的严重事故后,通过容器外冷却将堆芯熔融物滞留( In - Vessel Retention,IVR)在反应堆压力容器内是一种重要的核电站严重事故缓解措施.根据能量平衡方程,考虑器壁的物性参数变化、外部水冷却等情况,建立了器壁上的温度场模型,计算出稳态情况下的器壁温度场分布.研究表明,从热负荷角度,先进压水堆实施IVR是成功的.在分层结构的交界处,器壁熔化程度最严重.