| Li Zeshu,Tuo Fei,Zhang Jing,Zhou Qiang,Yang Baolu,Li Wenhong.Summary and analysis of national-wide γ-spectrometry assessment for radiological health institutions from 2015 to 2017[J].Chinese Journal of Radiological Medicine and Protection,2019,39(10):790-794 |
| Summary and analysis of national-wide γ-spectrometry assessment for radiological health institutions from 2015 to 2017 |
| Received:February 18, 2019 |
| DOI：10.3760/cma.j.issn.0254-5098.2019.10.014 |
| KeyWords:γ-spectrometry Relative deviation Accuracy Precision |
| FundProject:国家重点研发计划资助项目（2017YFF0206206） |
| Author Name | Affiliation | E-mail | | Li Zeshu | 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 | | | Tuo Fei | 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 | tuofei@nirp.chinacdc.cn | | Zhang Jing | 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 | | | Zhou Qiang | 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 | | | Yang Baolu | 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 | | | Li Wenhong | 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 | |
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| 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. ResultsThe 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. |
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