Validation of the axial expansion reactivity worth for a metal-fueled Sodium-cooled Fast Reactor via a physical experiment

被引：3

作者：

Yun, Sunghwan ^{[1
]}

Mikhailov, Gennadii ^{[2
]}

Kim, Sang Ji ^{[1
]}

Lim, Jae-Yong ^{[1
]}

机构：

[1] KAERI, 989-111 Daedeok Daero, Daejeon 305353, South Korea

[2] Inst Phys & Power Engn, Bondarenko Sq 1, Obninsk 249033, Kaluga Region, Russia

来源：

ANNALS OF NUCLEAR ENERGY | 2017年 / 110卷

基金：

新加坡国家研究基金会;

关键词：

BFS-109-2A; Axial expansion reactivity; Direct decomposition method; Physical experiment; Critical experiment;

D O I：

10.1016/j.anucene.2017.06.034

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：

For a metal-fueled SFR (Sodium-cooled Fast Reactor), the negative feedback of the reactivity due to the thermal expansion of fuel has been a principal safety mechanism to guarantee passive reactor shutdown after undercooling accidents. In this paper, an experimental model of the fuel axial expansion reactivity in a metal-fueled SFR was proposed and measured values using the BFS-109-2A critical assembly was compared with calculated values using as-built MCNP models based on the ENDF/B-VILO library. The energy-dependent axial expansion reactivity components of the BFS-109-2A model showed good agreement with those of the target core. The difference in the calculation/experiment ratio between the as built MCNP models and measurements vary from -10.2% to 2.6% for the axial expansion reactivity, meanwhile the suggested axial expansion model showed a 25% discrepancy comparing to the target core. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：244 / 257

页数：14

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