Analysis of the results from the 2024 national interlaboratory comparison for radionuclide measurement in bio-ash
10.13491/j.issn.1004-714X.2026.03.004
- VernacularTitle:2024年参加全国生物灰中放射性核素测量比对结果分析
- Author:
Chunming ZHONG
1
;
Xiang GAO
1
;
Jin ZHANG
2
;
Xin ZHANG
1
;
Yuqi HUANG
1
Author Information
1. Research Institute No. 230, CNNC, Changsha 410007, China;Hunan Engineering Technology Research Center for Evaluation and Comprehensive Utilization of Associated Radioactive Mineral Resources , Changsha 410007, China.
2. Hunan Engineering Technology Research Center for Evaluation and Comprehensive Utilization of Associated Radioactive Mineral Resources , Changsha 410007, China.
- Publication Type:OriginalArticles
- Keywords:
Comparison;
Radionuclide;
Gamma spectrometry analysis;
Bio-ash
- From:
Chinese Journal of Radiological Health
2026;35(3):331-335
- CountryChina
- Language:Chinese
-
Abstract:
Objective To enhance the gamma spectrometry analysis and detection capabilities of personnel in measuring radionuclides in bio-ash, and ensure the accuracy and precision of gamma spectrometer in our laboratory for the analysis of radionuclides in bio-ash. Methods The laboratory participated in the 2024 national interlaboratory comparison for radionuclide measurement in bio-ash. Radionuclides 241Am, 137Cs, and 40K in four different bio-ash samples were measured. Based on the measurement methods specified in GB/T 16145—2022, sample measurement, result calculation, and uncertainty evaluation were performed using spectrometry analysis software and sourceless efficiency calibration software. The measurement results and performance evaluation of the laboratory in the comparison were analyzed, and factors affecting gamma-spectrometry measurement and result interpretation were discussed. Results The relative deviation (D) of the measurement results for radionuclides 241Am and 137Cs in the four bio-ash samples ranged from −10.2% to 2.0% and −1.7% to 0.3%, respectively. The P statistic ranged from 7.0% to 12.5% and 5.0% to 10.8%, respectively. These results met the criteria of |D| ≤ 20% (MARB), |D| ≤ 2.58P, and P ≤ 20% (MARB). The ζ-scores for the measurement of 40K in the four bio-ash samples ranged from 0.8 to 1.3, satisfying the criterion of |ζ| < 2. All measurement results in this laboratory in the comparison were satisfactory. Conclusion The laboratory uses a high-purity germanium gamma spectrometer to measure radionuclides in bio-ash. The self-absorption correction method, analysis method, and uncertainty evaluation are appropriate, which can ensure the accuracy and precision of the measurement results. The measurement results are accurate and reliable.
