Neutronic analysis of thorium S&B fuel blocks with different driver fuels in advanced Block-type HTRs

被引：9

作者：

Attom, Areej Mutwakkil ^{[1
]}

Wang, Jincheng ^{[1
]}

Huang, Jie ^{[2
]}

Yan, Changqi ^{[1
]}

Ding, Ming ^{[1
]}

机构：

[1] Harbin Engn Univ, Coll Nucl Sci & Technol, Harbin 150001, Heilongjiang, Peoples R China

[2] China Nucl Power Technol Res Inst, Shenzhen 518031, Guangdong, Peoples R China

来源：

ANNALS OF NUCLEAR ENERGY | 2020年 / 136卷

基金：

中国国家自然科学基金;

关键词：

Thorium; Seed and blanket; Advanced high temperature reactor; Driver fuel; Neutronic analysis; REACTOR; BLANKET; SEED;

D O I：

10.1016/j.anucene.2019.107041

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Because of the high burnup achieved by thorium fuels, they are attractive for utilization in the so-called advanced high temperature reactor (AHTR), which is a new reactor that merges HTR and molten salt reactor (MSR) designs. Based on a typical fuel block of AHTR, the neutronic characteristics of seed and blanket (S&B) fuel blocks with different driver fuels, including the infinite multiplication factor (k(inf)), conversion ratio (CR), discharge burnup, energy spectra, equilibrium mass of U-233 and temperature coefficient of reactivity (alpha(T)), were investigated based on DRAGON V4. The seed is assumed to contain thorium with either U-233, RGrPu, WGrPu or WGrU while the blanket is always thorium. In terms of maximizing discharge burnup, 6 kg heavy metal (HM) per fuel block was selected for the comparison analysis of the four drivers. The same configuration of S&B 4 + 5 was used for all the investigated fuel blocks. It is shown that the k(inf) has the highest value for the fuel block with U-233 as driver fuel (Th/U233) and decreases passing to Th/WGrU, Th/WGrPu and Th/RGrPu. Though Th/RGrPu achieves the highest CR. Th/U233 achieves the deepest discharge burnup because of its high k(inf). The temperature coefficients of reactivity of fuel (alpha(TF)) and moderator (alpha(TM)) of Th/RGrPu, Th/WGrPu, and Th/WGrU are all negative. However, alpha(TF) of Th/U233 fuel block is negative but its a m is positive. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：11

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