Chen Jing
Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa, Ontario, Canada.
Radiat Prot Dosimetry. 2019 Dec 23;185(2):143-150. doi: 10.1093/rpd/ncy284.
Using data from a number of radon surveys, it was assessed that on average, radon progeny concentrations in Canadian homes are about three times higher than in school buildings, 4.7 times higher than in public buildings and indoor workplaces, and 12 times higher than in outdoor air. Canadian statistics show that most Canadians spend ~70% of their time indoors at home, 20% indoors away from home and 10% in outdoors. Due to relatively higher radon concentration in residential homes and longer time spent indoors at home, the exposure at home contributes to 90% of the radon-induced lung-cancer risk.
通过多项氡气调查的数据评估得出，加拿大住宅内氡子体的平均浓度大约是学校建筑内的三倍，是公共建筑和室内工作场所的4.7倍，是室外空气中的12倍。加拿大的统计数据显示，大多数加拿大人约70%的时间待在自家室内，20%的时间在自家以外的室内，10%的时间在室外。由于住宅内氡浓度相对较高，且在家中室内停留的时间更长，在家中的暴露导致了90%的氡诱发肺癌风险。
