TITLE:
Passive Cooldown Performance of Integral Pressurized Water Reactor
AUTHORS:
Shoubao Dai, Chunnan Jin, Jingfu Wang, Yuxiang Chen
KEYWORDS:
An Integral Pressurized Water Reactor (IPWR); Passive Safety System; Styling; Natural Circulation
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
October
29,
2013
ABSTRACT: The design of an integral pressurized water reactor
(IPWR) focuses on enhancing the safety and reliability of the reactor by
incorporating a number of inherent safety features and engineered safety
features. However, the characteristics of passive safety systems for the marine
reactors are quiet different from those for the land nuclear power plant
because of the more formidable and dangerous operation environments of them.
This paper presents results of marine black out accident analyses. In the case
of a transient, the passive residual heat removal system (PRHRS) is designed to
cool the reactor coolant system (RCS) from a normal operation condition to a
hot shutdown condition by a natural circulation, and the shutdown cooling
system (SCS) is designed to cool the primary system from a hot shutdown
condition to a refueling condition by a forced circulation. A realistic
calculation has been carried out by using the RELAP5/MOD3.4 code and a
sensitivity analysis has been performed to evaluate a passive cooldown
capability. The results of the accident analyses show that the reactor coolant
system and the passive residual heat removal system adequately remove the core
decay heat by a natural circulation.