Numerical Simulation of Natural Circulation Phenomena in a PWR (Pressurized Water Reactor) during TMLB' Transients Prior to Core Damage,

摘要

Multidimensional thermal-hydraulic simulation of natural circulation phenomena during a TMLB' transient prior to core damage has been performed by using the COMMIX computer code. Both a three-loop and a four-loop PWR plant are analyzed. Effects of various parameters on natural circulation are investigated. The most important result is that natural circulation exists during a TMLB' transient for all the cases investigated so far.