Analysis of HCSB DEMO neutron flux spectra and conceptual design of detection system based on foil activation method

doi:10.16568/j.0254-6086.201602009

Abstract

Abstract:

Monte Carlo particle transport code (MCNP) was applied to build the model of HCSB DEMO. The neutron flux spectra of HCSB DEMO has been analyzed. The foils were selected according to characteristics of the neutron flux spectra. Based on the rabbit radiation system and the foil activation method, the preliminary design of the neutron detection system was performed, which can be applied to detect the breeder blanket neutron of HCSB DEMO. The functions of the components of the system was introduced. The specific reaction rates of the foils were calculated when the foils are irradiated in the irradiation station of the detection system in HCSB DEMO. The emission rates and the counting rates of the characteristic γ rays were calculated. A reasonable operation scheme of the system was obtained and it can be used to detect the breeder blanket neutron.

Key words: DEMO, Blanket neutron detection, MCNP, Foil activation method

摘要：

利用蒙特卡罗粒子输运程序(MCNP)对氦冷固态增殖剂包层聚变示范堆(HCSB DEMO)做了中子通量谱分析。根据中子通量谱特点选出活化片材料，根据跑兔系统和活化片法测中子通量的原理设计出适用于测量HCSB DEMO 增殖包层中子的活化片法测量系统，并对其各组成部分及功能做了说明。计算了活化片在测量系统辐照端辐照时的活化反应率、活化片特征γ 射线发射率及特征γ 计数率，并得到一套合理的测量方案，用于HCSB DEMO 包层中子的测量。

关键词: DEMO, 包层中子测量, MCNP, 活化片法

CLC Number:

TL65+7

FENG Yong, LI Zai-xin, ZHAO Feng-chao. Analysis of HCSB DEMO neutron flux spectra and conceptual design of detection system based on foil activation method[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2016, 36(2): 148-153.

冯勇，栗再新，赵奉超. HCSB DEMO 中子通量谱分析及活化片法测量系统概念设计研究[J]. 核聚变与等离子体物理, 2016, 36(2): 148-153.

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