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research-article

Burnable Poison Design for Supercritical Water Cooled Reactor with Annular Fuel

[+] Author and Article Information
Chuanqi Zhao

Nuclear and Radiation Safety Center, Ministry of Environmental Protection, 2nd East Floor, Huike Building, Xi Si Huan North Road, Haidian, Beijing, China, 100142
zhaochuanqi@chinansc.cn

Kunpeng Wang

Nuclear and Radiation Safety Center, Ministry of Environmental Protection, 2nd East Floor, Huike Building, Xi Si Huan North Road, Haidian, Beijing, China, 100142
wangkunpeng@chinansc.cn

Liangzhi Cao

School of Nuclear Science and Technology, Xi'an Jiaotong University, Xianning Xi road 28#, Xi'an, Shannxi, China, 710049
caolz@mail.xjtu.edu.cn

Youqi Zheng

School of Nuclear Science and Technology, Xi'an Jiaotong University, Xianning Xi road 28#, Xi'an, Shannxi, China, 710049
yqzheng@mail.xjtu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4037119 History: Received April 24, 2017; Revised June 13, 2017

Abstract

Burnable poison (BP) is used to control excess reactivity in Supercritical Water Cooled Reactor (SCWR). It helps reducing the number of control rods. Overall BP designs, the design in which rare-earth oxide mixes with fuel is widely used in SCWR. BP has influence on fuel assembly neutronics performance. After comparing four kinds of rare-earth oxide, Er2O3 is chosen as BP for annular fuel assembly. The effect of different BP loading patterns on assembly power distribution is analyzed. The safety of annular fuel assembly is estimated with different BP containments. Core performance with and without BP is compares. The results have shown that the core radial power peaking factor decreases by introducing BP. It is also shown that the core axial power peaking factor increases and the power peak moves towards the top of the core. The reason of this effect was studied. Two optimizations were given based on this study: decreasing the temperature of lower plenum, and increasing the gradients of axial enrichments. By applying these optimizations, core axial power peaking factor and maximum cladding surface temperature decreased.

Copyright (c) 2017 by ASME
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