Development and application of radiation shielding device for radiation survey detector

VernacularTitle:辐射巡测仪探头的射线屏蔽装置的设计与应用
Author: Xiaoguang LU ; Hiroki OHTANI
Keywords: Radiation level; Fukushima; Decontamination; Radiation survey meter; Radiation shielding
From: Chinese Journal of Radiological Medicine and Protection 2017;37(4):282-285
CountryChina
Language:Chinese
Abstract: Objective To develop the radiation shielding device for an environmental radiation survey meter with an aim to precisely measure local radiation levels and evaluate decontamination effectiveness in Fukushima.Methods A kind of lead alloy was selected as the main material for the shielding device.Attenuation effects of different lead plates and lead cylinders were measured at the radiation regulatory laboratory and in a polluted area of Fukushima,respectively.The whole shielding device was designed on the basis of measurement results,attenuation effects,cost of production and practicability.Results The whole device was composed of main shielding,probe shielding and a bracket with lid.The main shielding was a lead cylinder with 10 cm in height and 3 cm in thickness.The probe shielding was a lead cylinder with 8 cm in height and 2 cm in thickness.The thickness of lid was 1 cm.Conclusions The device can be available to effectively shield the influence of ambient radiation and accurately measure local radiation levels and evaluate decontamination effectiveness.It can play a valuable part in post-disaster reconstruction of contaminated areas in Fukushima.