全国标准级测氡仪的统一校准及低浓度测量比对

doi:10.3969/j.issn.1000-1158.2024.02.19

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Abstract To improve the capacity of radon metrology in China, the standard radon monitors from 11 standard laboratories were calibrated uniformly. The low-level concentration comparison was conducted base on the unified calibration. The unified calibration was carried out at 700~3000Bq/m³ radon concentration, and the reference value of radon concentration can be traced to the primary standard of radon activity, Urel=1.6% (k=2). The range of response to reference radon atmosphere for standard radon monitors are 0.93~1.02, and the uncertainties range are 2.2%~3.6% (k=2). The low-level concentration comparison was carried out at 100~400Bq/m³, the most standard radon monitors En<1. By optimizing the strategy, it is feasible for standard radon moniters to transfer above 100Bq/m³. However, it is necessary to improve the ability of measurement and concentration control for each laboratory to carry out transfer at concentration of 100Bq/m³or below.

Key words： ionizing radiation metrology radon volume activity standard radon monitor calibration domestic comparison

Received: 10 January 2023 Published: 21 February 2024

PACS:

TB98

Fund:Key fields of basic scientific research business expenses of National Institute of Metrology, China;Key fields of basic scientific research business expenses of National Institute of Metrology, China

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	Articles by authors
	SUN Changhao
	YANG Zhijie
	LIU Meiling
	LIU Haoran
	ZHANG Jian
	LIANG Juncheng

Cite this article:

SUN Changhao,YANG Zhijie,LIU Meiling, et al. Unified Calibration and Low-Level Concentration Comparison of Standard Radon Monitors in China[J]. Acta Metrologica Sinica, 2024, 45(2): 279-284.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2024.02.19 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2024/V45/I2/279

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