用于快速中子场表征的简化博纳球系统的开发、特性研究与测试

DEVELOPMENT, CHARACTERIZATION AND TESTING OF A SIMPLIFIED BONNER SPHERE SYSTEM FOR RAPID NEUTRON FIELD CHARACTERIZATION.

作者信息

Van Hoey Olivier, Vanhavere Filip, Verbraeken Lise

机构信息

The Belgian Nuclear Research Center SCK·CEN, Mol, Belgium.

Fontys University of Applied Sciences, Eindhoven, The Netherlands.

出版信息

Radiat Prot Dosimetry. 2018 Aug 1;180(1-4):85-88. doi: 10.1093/rpd/ncx224.

DOI:10.1093/rpd/ncx224

PMID:29040786

Abstract

Personal neutron dosimetry requires workplace specific correction factors from detailed neutron field characterization. A Bonner sphere system (BSS) with a 3He proportional counter and a 3 inch an a 9 inch sphere was developed at SCK·CEN for rapid neutron field characterization. The BSS energy and angular responses were simulated with MCNPX and validated by irradiations with a thermal neutron beam at the Belgian Reactor 1 (BR1) and 252Cf and Am-Be sources at the SCK·CEN Laboratory for Nuclear Calibration (LNK). The BSS unfolding performance was tested using the FRUIT unfolding code for measurements of the scattered neutron field at the LNK. The unfolded spectra were in good agreement with MCNPX simulations.

摘要

个人中子剂量测定需要根据详细的中子场特征得出特定工作场所的校正因子。SCK·CEN研发了一种配备³He正比计数器以及3英寸和9英寸球体的邦纳球系统（BSS），用于快速中子场特征描述。利用MCNPX对BSS的能量和角响应进行了模拟，并通过在比利时1号反应堆（BR1）用热中子束以及在SCK·CEN核校准实验室（LNK）用²⁵²Cf和Am-Be源进行辐照来进行验证。使用FRUIT解谱代码对BSS在LNK测量散射中子场时的解谱性能进行了测试。解谱后的能谱与MCNPX模拟结果吻合良好。