摘要
在中子周围剂量当量仪校准过程中,使用D-D中子源代替传统同位素中子源会使校准过程具有更高的安全性。为推动D-D中子源在中子周围剂量当量仪校准过程中的应用,提出了应用蒙特卡罗(MC)法的能量截断法代替影锥法的散射中子研究方法;分析了在不同类型房间中,不同内部空间尺寸对散射中子的影响。计算结果表明随着房间内部空间的增大,入射探测器的散射中子所占比例会逐渐减小。若使用D-D中子源进行中子周围剂量当量仪校准,在探测距离75 cm,探测器直径20 cm的情况下,所需的最小正方体房间的内部空间棱长为332 cm;所需最小长方体房间的内部空间的长、宽、高分别为410 cm、410 cm、205 cm。。
In the calibration process of neutron peripheral dose equivalent instrument,using D-D neutron source instead of traditional isotope neutron source will make the calibration process more secure.In order to promote the application of D-D neutron source in the calibration process of neutron peripheral dose equivalent instrument,the method of scattering neutron research using MC energy truncation instead of shadow cone method is proposes,and the influence of different internal space sizes on scattering neutron in different types of rooms is analyzed.The calculation results show that with the increase of the internal space of the room,the scattering neutron of the incident detector accounts for the proportion will gradually decrease.If the D-D neutron source is used for the calibration of the neutron peripheral dose equivalent instrument,when the detection distance is 75 cm and the detector diameter is 20 cm,the minimum cube room required is a cube room with an internal space of 332 cm edge length;the minimum cube room required is a cuboid room with an internal space of 410 cm in length,410 cm in width and 205 cm in height.
作者
田兴宇
张雄杰
汤彬
胡斌
宋乐天
TIAN Xing-yu;ZHANG Xiong-jie;TANG Bin;HU Bin;SONG Le-tian(Engineering Center of the Ministry of Education of Nuclear Technology Application,Nanchang,Jiangxi 330013,China;East China University of Technology,Nanchang,Jiangxi 330013,China)
出处
《计量学报》
CSCD
北大核心
2021年第7期971-976,共6页
Acta Metrologica Sinica
基金
国家重大科学研究计划(2017YFF0104200)
国家自然科学基金(41704171)
国防基础科研项目(JCKY2018-401C001)
江西省自然科学基金(20192BAB202009)。
关键词
计量学
D-D中子源
散射中子
中子周围剂量当量仪
校准
metrology
D-D neutron source
scattered neutron
neutron ambient dose equivalent meter
calibration
