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Science and Technology of Nuclear Installations
Volume 2014, Article ID 178129, 8 pages
Research Article

Core Flow Distribution from Coupled Supercritical Water Reactor Analysis

1School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2Department of Engineering Physics, University of Wisconsin-Madison, Madison, WI 53705, USA

Received 6 January 2014; Revised 9 April 2014; Accepted 10 April 2014; Published 15 May 2014

Academic Editor: Jiejin Cai

Copyright © 2014 Po Hu and Paul P. H. Wilson. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper introduces an extended code package PARCS/RELAP5 to analyze steady state of SCWR US reference design. An 8 × 8 quarter core model in PARCS and a reactor core model in RELAP5 are used to study the core flow distribution under various steady state conditions. The possibility of moderator flow reversal is found in some hot moderator channels. Different moderator flow orifice strategies, both uniform across the core and nonuniform based on the power distribution, are explored with the goal of preventing the reversal.