Quality control measures of thermoluminescent dosimetry system used in environmental radiation monitoring
10.13491/j.issn.1004-714X.2021.04.014
- VernacularTitle:用于环境辐射水平监测的热释光测量系统的质量控制
- Author:
Li YANG
1
;
Lijiao WANG
1
;
Minggang SHAO
1
;
Fanfan KONG
1
;
Zhongwen WANG
1
Author Information
1. China Institute of Atomic Energy, Beijing 102413 China.
- Publication Type:RadiationMonitoring/OriginalArticles
- Keywords:
Thermoluminescent Dosimetry System;
Quality Control Measures;
Stability;
Metrological Performance Test
- From:
Chinese Journal of Radiological Health
2021;30(4):457-462
- CountryChina
- Language:Chinese
-
Abstract:
Objective To discuss the quality control measures of the thermoluminescent dosimetry system and to verify its propriety of when used in environmental radiation monitoring. Methods The quality control measures included the stability test, the dispersibility screening and the uncertainty evaluation of measurement results of the TLD reader and TLD detector, in addition, the environmental radiation accumulated dose monitoring results obtained by the high pressure ionization chamber were compared with those by the thermoluminescent dosimetry system. Results The variation range of TLD reader’s light source coefficient is within 0.070 ～ 0.073 during the preheating and measuring process, which meets the requirements of stability; The χ2 value of the TLD detector is 2.088, which obeys the normal distribution; The thermoluminescent dosimetry system’s nonlinear response, coefficient of variation and energy response meet the measurement requirements; There is a deviation of −6.58% the largest between the cumulative dose obtained by TLD and the high pressure ionization chamber. Conclusion The quality control measures discussed in this paper can be used as a reference for similar thermoluminescent dosimetry system. Our system has passed all the tests and can meet the environmental radiation cumulative dose monitoring requirements.
