FLOWAND HEAT TRANSFER IN PRESSURIZEDWATER REACTOR REFLOOD

Abstract

In a pressurized water rector (PWR), following a postulated large break loss of coolant accident (LB-LOCA) an important stage in the recovery of the core is the reflood process in which the core is reflooded (rewetted) by water injected from the emergency core cooling system (ECCS). This review summarises the studies which have been carried out on the reflood process. Despite all the work that has been done, it is concluded that there is still a need for improved basic understanding of the detailed processes occurring, and in particular the nature of the fluid/hot solid interactions in the close vicinity of the rewetting front.