Study on outdoor radon and its progeny concentration level and variation pattern in Beijing area
10.3760/cma.j.issn.0254-5098.2020.09.008
- VernacularTitle:北京地区室外氡及氡子体浓度水平及变化规律研究
- Author:
Peng GAO
1
;
Yi WANG
;
Zhiyan SONG
;
Xueyun SUN
Author Information
1. 北京市辐射安全技术中心，北京 100089
- From:
Chinese Journal of Radiological Medicine and Protection
2020;40(9):698-701
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To understand the concentration level of radon and its progeny in outdoor air in Beijing area and to analyze the related variation pattern and influencing factors.Methods:The continuous measurement device for radon and its progeny concentration is used for the one-year continuous measurement at three points in different directions in Beijing area.Results:The annual concentration average value was (10.9±4.9) Bq/m 3 for radon and (5.8±3.4) Bq/m 3 for its progeny (equilibrium equivalent radon concentration EEC) in outdoor air in Beijing with the annual average value of 0.52±0.19 for equilibrium factor F. Clear diurnal variations of the concentrations of radon and its progeny was observed. Conclusions:The result of one-year continuous measurement show that the concentrations of radon and its progeny in the outdoor air in Beijing area are close to the world average, lower than the typical values in China given by grab sampling measurement. The daily variation pattern of radon and its progeny concentrations is similar to those at home and abroad. The seasonal variation pattern features local climate in Beijing.
