Proposal of a new fuel assembly design for supercritical water cooled reactor

LIU Xiaojing; CHENG Xu

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Proposal of a new fuel assembly design for supercritical water cooled reactor

LIU Xiaojing 1 * #,CHENG Xu 2

1.School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240

2.School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240

*Correspondence author

#Submitted by

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Funding: Doctoral Fund of Ministry of Education of China （No.No.20110073120045）

Opened online:12 May 2014

Accepted by: none

Citation: LIU Xiaojing,CHENG Xu.Proposal of a new fuel assembly design for supercritical water cooled reactor[OL]. [12 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4595492

The supercritical water cooled reactor (SCWR) is a Light Water Reactor (LWR) operating at higher pressure and temperature. Operation above the critical pressure eliminates coolant boiling phenomenon so that the coolant remains single-phase throughout the reactor. Due to its high thermal efficiency and economical competitiveness, SCWR has achieved significant interests of nuclear industries and research institutions. R&D programs have been launched worldwide to study the phenomena involved in SCWR. Design of fuel assemblies of thermal SCWR is one of the main challenging tasks due to: complicated fuel assembly configurations and strong coupling effect of thermal-hydraulics with neutron-kinetics. Although a large number of fuel assembly designs have been proposed, no agreement has been achieved. Further activities are thus needed to develop reliable numerical analysis tools and to propose and assess new fuel assembly designs. In the present paper, new design concepts of SCWR fuel assembly were proposed. The thermal-hydraulic performance and neutron-physical behavior of the new fuel assemblies were investigated using the newly developed coupled code. The results achieved so far indicate the new fuel assembly design has a more uniform distribution of the power density and the coolant temperature compared to the previous ones.

Keywords:Supercritical water cooled reactor (SCWR), fuel assemblies, design analysis

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