1.Engineering Center of the Ministry of Education of Nuclear Technology Application,Nanchang,Jiangxi 330013,China
2.East China University of Technology,Nanchang,Jiangxi 330013,China
Abstract：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 75cm and the detector diameter is 20cm, the minimum cube room required is a cube room with an internal space of 332cm edge length; the minimum cube room required is a cuboid room with an internal space of 410cm in length, 410cm in width and 205cm in height.
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2021, Vol. 42 
