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作 者:吕宁 过惠平 尚爱国 周城 吕金旭 赵括 魏志浩 吕汶辉 刘洋 李大吉 王凯[6] LV Ning;GUO Huiping;SHANG Aiguo;ZHOU Cheng;LV Jinxu;ZHAO Kuo;WEI Zhihao;LV Wenhui;LIU Yang;LI Daji;WANG Kai(Rocket Force Engineering University,Xi'an 710025;Troops 96942 of PLA,Beijing 102200;Troops 92609 of PLA,Beijing 100077;Xi'an Guanneng Neutron Detection Technology Co.Ltd.,Xi’an 710023;Troops 96605 of PLA,Shenyang 110000;Troops 96035 of PLA,Jilin Tonghua 134000)
机构地区:[1]火箭军工程大学,西安710025 [2]中国人民解放军96942部队,北京102200 [3]中国人民解放军92609部队,北京100077 [4]西安冠能中子探测技术有限公司,西安710123 [5]中国人民解放军96605部队,沈阳110000 [6]中国人民解放军96035部队,吉林通化134000
出 处:《辐射防护》2020年第3期186-192,共7页Radiation Protection
摘 要:本文利用小型可控中子源和中子剂量参考仪器组成的核设施现场标校系统,通过空间位置对称条件下的待校准仪器与参考仪器对中子管出射中子响应之比,得到校准系数;为了完成仪器的周围剂量当量校准系数从国家标准计量检定中心参考辐射场到核设施现场的传递,必须对其进行能量修正。通过Am-Be中子源模拟核设施内部辐射场,在其中进行中子剂量仪器现场标校实验,并与校准过的多球中子谱仪测量结果相比较。结果表明:使用未经修正的校准系数对待校准仪器的测量结果进行校准,周围剂量当量率相对偏差为17.0%;使用修正后的校准系数对待校准仪器的测量结果进行校准,周围剂量当量率相对偏差为-2.4%。In this paper,a nuclear facility on-site calibration system consisting of a small-scale controllable neutron source and a neutron dose reference instrument is used to obtain the calibration coefficient through the ratio of the response of the instrument to be calibrated and the reference instrument to the neutron emission of the neutron tube in a symmetrical position.In order to complete the transfer of the instrument’s ambient dose equivalent calibration coefficient from the reference radiation field of the National Standards Metrology and Calibration Center to the nuclear facility site,the calibration coefficient must be energy corrected.Am-Be neutron source was used to simulate the radiation field inside the nuclear facility,the on-site calibration experiments of neutron dose instruments were performed,and compared with the measurement results of the calibrated multi-sphere neutron spectrometer.The results have shown that:if the measurement results of the instrument to be calibrated were calibrated using an uncorrected calibration coefficient,the relative deviation of the ambient dose equivalent rate was 17.0%;while if the measurement results of the instrument to be calibrated were calibrated using the corrected calibration coefficient,the relative deviation of the ambient dose equivalent rate would be-2.4%.
关 键 词:中子剂量 仪器标校 能量修正 辐射场测量 现场标校
分 类 号:TL75[核科学技术—辐射防护及环境保护]
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