Journal of Radiation Research and Radiation Processing, Volume. 43, Issue 3, 030501-1(2025)

Uncertainty evaluation of the measurement of gross beta activity in the groundwater of a nuclear power plant

Juntao ZHENG1, Di WU2, Jin XU3, Guopeng XU3, Zhihao ZHENG4, and Feng CHENG1、*
Author Affiliations
  • 1Yangjiang Nuclear Power Co., Ltd., Yangjiang, Yangjiang 529941, China
  • 2Daya Bay Nuclear Power Operations and Management Co. Ltd., Shenzhen 518124, China
  • 3CGN Huizhou Nuclear Power Co., Ltd., Huizhou 516353, China
  • 4Huizhou Ruihui Labor Property Management Co., Ltd., Huizhou 516005, China
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    In this study, a comprehensive assessment of the uncertainty in the measurement of gross beta activity in the groundwater of a nuclear power plant was performed. Through a detailed analysis of the main steps in the determination process, the sources of uncertainty affecting the measurement results were identified and quantified, and the combined and expanded uncertainties were calculated. The results showed that the main factors affecting the determination of gross beta activity concentration in groundwater by the thick source method include sampling, sample recovery rate, correction factor of α-ray cross-talk in the β channel, specific activity of the reference material, and sample counting rate, collectively accounting for approximately 80.6%. The contributions of the specific activity of the reference material, the sample counting rate, and the spreading uniformity of the sample were approximately 35.4%. The effects of the sample size, residue quality, and data rounding were relatively small. The uncertainty introduced by sampling, which accounted for 13.5%, should not be underestimated.

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    Juntao ZHENG, Di WU, Jin XU, Guopeng XU, Zhihao ZHENG, Feng CHENG. Uncertainty evaluation of the measurement of gross beta activity in the groundwater of a nuclear power plant[J]. Journal of Radiation Research and Radiation Processing, 2025, 43(3): 030501-1

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    Paper Information

    Category: RADIATION DOSIMETRY

    Received: Sep. 24, 2024

    Accepted: Nov. 23, 2024

    Published Online: Jul. 7, 2025

    The Author Email: Feng CHENG (成丰)

    DOI:10.11889/j.1000-3436.2024-0079

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