SUPERCRITICAL WATER REACTOR STEADY-STATE, BURNUP, AND TRANSIENT ANALYSES WITH EXTENDED PARCS/RELAP5

摘要

This paper studies the U.S. reference Supercritical Water Reactor (SCWR) design with the newly extended coupled codes PARCS/RELAP5. Steady-state, burnup, and loss-of-feedwater transients are simulated. A possi ble flow reversal in moderator channels is found in the simulations, and the impact of this reversal on power rnpeaking and reactivity is observed. The transient results show that the assembly with the maximum cladding sur face temperature (MCST) and the assembly with the max imum power are different and that the MCST is within the material limit under the current design.