
第33卷
第1期
2013年
3月
核科学与工程
Nuclear Science and Engineering
基于Bonner
多球的环境中子
能谱和剂量率测量
祝庆军1.2,宋逢泉12,郭
倩1,2,廖燕飞2,宋
(1.中国科学技术大学,安徽合肥230026:
Vol.33No.1
Mar.2013
钢2.FDS团队
2.中国科学院核能安全技术研究所,安徽合配230031)
摘要:使用Bonner谱仪对室内中子谱进行测量。根据Bonner多球的读数,采用最大摘法求解中子能谱,并根据注量-剂量转换系数得到中子剂量率,为验证测量结果,使用基于解析公式的模拟软件 EXPACSVer2.21进行能谱验证、使用BF;固定式环境中子监测器进行剂量率验证。经过验证分析表明基于最大端法的Bonner测量结果与其他方法的结果基本符合,合肥地区环境中中子周雷剂量当量率在2.6nSv·h-1至14.38nSv·h-1之间。
关键调:最大炼法;Bonner多球;环境中子;中子能谱
中图分类号:0536
文章标志码:A
文章编号:0258-0918(2013)01-0049-06
Measurement of spectrum and dose rateof
naturalneuronusingbonnerspheres
ZHU Qing-jun'-, SONG Feng-quanl, GUO Qian'-2,
LIAO Yan-fei’, SONG Gang", FDS Team
(1. University of Science and Technology of China, Hefei, Anhui Prov. 230026, China:
2. Institute of Nuclear Energy Sefety Technology , Chinese Academy of Sciences, Hefei, Anhui Prov, 230031, China) Abstract: The natural neutron spectrum indoor was measured by using Bonner spheres spectrometer in Hefei. A Bonner sphere spectrometer with maximum entropy method was used to unfold neutron spectrum. Then according to the fluence to dose coefficient, the dose rate was calculated.The software EXPACS Ver2.21 based on the analytic methods for simulating the natural neutron spectrum was adopted to verify the neutron spectrum, and the BF, natural neutron monitors were used to confirm the effective dose rate. The verification and analysis indicated that the results from Bonner spheres spectrometer consistent with others. The ambient dose equivalent rate of neutron in Hefei was between 2. 6 nSv · h~'and 14. 38 nSv · h=1
收日期:2012-10-12:修回日期:2012-12-03
基金项目:国家自然科学基金(No.30900386)和中国科学院战略性先导科技专项(No,XDA03040000)作者简介:祝庆军(1985一),男,安徽人,在读博士研究生,主要研究方向为中予物理与核安全
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