Simulation study on the design of nondestructive measurement system using fast neutron direct interrogation method to nuclear materials in fuel debris

被引:3
|
作者
Maeda, Makoto [1 ]
Furutaka, Kazuyoshi [1 ]
Kureta, Masatoshi [1 ]
Ohzu, Akira [1 ]
Komeda, Masao [1 ]
Toh, Yosuke [1 ]
机构
[1] Japan Atom Energy Agcy, Nucl Sci & Engn Ctr, 2-4 Shirakata, Toukai 3191195, Japan
关键词
Fast response detector bank; fuel debris; material accountancy; FNDI method; MVP; PHITS; DIE-AWAY ANALYSIS; CODE;
D O I
10.1080/00223131.2019.1611500
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
In order to measure the amount of nuclear materials in the fuel debris produced in the Fukushima Daiichi Nuclear Power Plant accident, we have designed a measurement system based on a Fast Neutron Direct Interrogation (FNDI) method. In particular, we have developed a fast response detector bank for fast neutron measurements by Monte Carlo simulations. The new bank has more than one order of magnitude faster response compared to the standard ones. We have also simulated the nondestructive measurements of the nuclear materials in homogeneously mixed fuel debris with various matrices which contain stainless steel (JIS SUS304), concrete, and various control-rod (CR) contents in the designed system. The results show that if the debris contains less than 1.0 vol% of CR component and more than 2.5 vol% of spent fuel component, the fissile materials in the debris can be measured by using the designed system.
引用
收藏
页码:617 / 628
页数:12
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