Analysis of Thorium-Loaded S&B Fuel Blocks Using RGPu and WGPu as Driver Fuels

被引：0
作者：
Wang J. [1 ]
Huang J. [2 ]
Ding M. [1 ]
机构：
[1] Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin
[2] China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen, 518026, Guangdong
来源：
Hedongli Gongcheng/Nuclear Power Engineering | 2020年 / 41卷 / 02期
关键词：
Reactor grade plutonium(RGPu); Spatial separation; Thorium-loaded S&B fuel blocks; Weapon grade plutonium(WGPu);
D O I：
10.13832/j.jnpe.2020.02.0016
中图分类号：
学科分类号：
摘要：
Weapon grade plutonium(WGPu) and reactor grade plutonium(RGPu) can be obtained from old dismantled nuclear weapons and spent fuel in LWRs, both of which can be used as driver fuels of thorium-loaded reactor. In order to analyze the two driver fuels, the DRAGON V4 and the JEFF 3.11-295 group cross section library were used for neutronic calculation. The modified four-factor formula was used to analyze the initial infinite multiplication factor of S&B 6+3 block under WGPu and RGPu driving conditions. At the same time, in order to determine the optimal spatial separation scale and thorium content of WGPu and RGPu proliferation performance, the 233U mass of S&B type blocks in different spatial separation scales and MOX blocks at the end of life were further compared. The results show that with same content of thorium, WGPu has a higher thermal neutron fission coefficient, which leads to its initial infinite multiplication factor and discharge burnup greater than RGPu, and has nothing to do with the thorium content. RGPu, as a driving fuel S&B 5+4-70 %Th, has the best proliferative properties. As for WGPu, the 233U mass of the MOX type block is greater than that of the S&B type block and reaches a maximum at 70% thorium content. © 2020, Editorial Board of Journal of Nuclear Power Engineering. All right reserved.
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页码：16 / 21
页数：5
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