Summary and analysis of national-wide γ-spectrometry assessment for radiological health institutions from 2015 to 2017
10.3760/cma.j.issn.0254-5098.2019.10.014
- VernacularTitle: 2015—2017年全国放射卫生技术机构γ能谱考核结果总结与分析
- Author:
Zeshu LI
1
;
Fei TUO
1
;
Jing ZHANG
1
;
Qiang ZHOU
1
;
Baolu YANG
1
;
Wenhong LI
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:Journal Article
- Keywords:
γ
-spectrometry;
Relative deviation;
Accuracy;
Precision
- From:
Chinese Journal of Radiological Medicine and Protection
2019;39(10):790-794
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To standardize the operation and data processing in radiological health institutions in China, in order to promote the assessment of γ-spectrometry, improve the measurement and analysis capabilities of each laboratory, and accordingly improve accuracy of environment sample measuring.
Methods:By collecting the values of 232Th, 40K and 137Cs contents in soil samples from 2015 to 2017, the assessment results of γ-spectrometry laboratores were summarized and analyzed.
Results:The technical institutions from 25 provinces were involved in the assessment until 2017, including disease control and prevention centers, entry-exit inspection and quarantine agencies, research institutes, universities and companies. The number of participants was increased from 40 to 48, and the qualified rate exceeded 90%, and the excellent rate was no less than 11% each year. The percentage of relative deviation less than 10% between the measuring result of 232Th, 40K and 137Cs contents and the reference value was larger than 80% in 2017. The accuracy became better. However, the number of institutions with U and Z score less than 1 was increased from 11 to 25, suggesting that the precision of measuring result has also been greatly improved.
Conclusions:Radiological health institutions in China have good measurement and analysis capabilities with regard to γ-spectrometry, which can meet the needs of environmental sample measurement and in-food radionuclide risk monitoring in an emergency of nuclear and radiation. But a few institutions′ measuring results were largely different from the reference values, as a consequence, it is important to strengthen their ability of measurement and analysis.
