|
KMID : 1151820170110040183
|
|
Journal of the Korean Society of Radiology
2017 Volume.11 No. 4 p.183 ~ p.188
|
|
|
The Study on Design of lead monoxide based radiation detector for Checking the Position of a Radioactive Source in an NDT
|
|
Ahn Ki-Jung
|
|
|
Abstract
|
|
|
|
In recent years, the automatic remote control controller of the gamma ray irradiator malfunctions, and radiation workers are continuously exposed to radiation exposure accidents. In the non-destructive testing field, much time and resources are invested in establishing a radioactive source monitoring system in order to prevent potential incidents of radiation. In this study, the gamma-ray response properties of the lead monoxide-based radiation detector were estimated through monte carlo simulation as a previous study for the development of a radioactive source location monitoring system that can be applied universally to various non-destructive testing equipment. As a result of the study, the optimized thickness of the radiation detector varies according to the gamma-ray energy emitted from the radioactive source, and the optimized thickness gradually increases with increasing energy. In conclusion, the optimized thickness of the lead monoxide-based radiation detector was 200 μm for the Ir-192, 150 μm for the Se-75 and 300 μm for the Co-60. Based on these results, the appropriate thickness of lead monoxide-based radiation detector considering secondary-electron equilibrium was evaluated to be 300 μm for general application. These results can be used as a basic data for determining the appropriate thickness required in the radiation detector when developing a radiation source location monitoring system for universal application to various non-destructive testing equipment in the future.
|
|
|
KEYWORD
|
|
|
Non-destructive inspection, Gamma-ray projector, Radioactive source, Solid-state detector, lead monoxide
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|