Application of sourceless efficiency calibration in activity measurement of gas source in Marinelli beaker
10.13491/j.issn.1004-714X.2022.01.002
- VernacularTitle:无源效率刻度在马林杯状气体源活度测量中的应用
- Author:
Shuo WANG
1
;
Baolu YANG
1
;
Qiang ZHOU
1
;
Zeshu LI
1
;
Wenhong LI
1
;
Jing ZHANG
1
;
Fei TUO
1
Author Information
1. Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088 China.
- Publication Type:OriginalArticles
- Keywords:
Marinelli beaker;
Sourceless efficiency calibration;
LabSOCS;
Gamma ray spectrometry;
Noble gas
- From:
Chinese Journal of Radiological Health
2022;31(1):6-12
- CountryChina
- Language:Chinese
-
Abstract:
Objective To optimize the Marinelli beaker with the simulation of Laboratory Sourceless Object Calibration Software (LabSOCS), to investigate the detection efficiency of HPGe detector in measuring noble gas, and to provide a reference for the measurement and optimization of noble gas effluent from nuclear power plants. Methods LabSOCS was used to establish a Marinelli beaker model to investigate the relationship of gamma ray detection efficiency of noble gas with gas components, gas density, size and volume of the Marinelli beaker, and the shape of source container. Results The gas components had little effect on the detection efficiency of the noble gas in the Marinelli beaker. The gas density had a relatively great effect on the detection efficiency of low-energy gamma ray. The Marinelli beaker of appropriate height and radius enabled the HPGe detector to get better measurement results. For the BE5030 HPGe detector, the highest detection efficiency of the Marinelli beakers of different volumes were observed at the location where the radius/height ratio was 0.7, and the optimal values of height and radius were given for the Marinelli beakers of different volumes. Conclusion Choosing Marinelli beaker of the appropriate size can improve the detection efficiency of noble gas in the effluent from nuclear power plants.
