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1989年,我们对成都市18个具有代表性的地下建筑内氡浓度及相关人员居留时间作了调查。初步摸清了成都市地下建筑中工作人员受氡附加照射的影响。现报告如下。测量方法采用闪烁法闪烁瓶本底满足2Bq·m~(-3)的探测限,当空气中氡浓度为 n×10~2Bc·m~(-3)时,偏差在±5％内。采样地点离墙面1m,离地面1.5m,避开通风口采样,以保证样品的一致性。采样后放置3h,待氡及子体处于平衡后再测量。测量结果成都市地下建筑内氡浓度(附表)a 类建筑内氡浓度低于 b 类、c 类,这与 a 类的墙体都已装
In 1989, we investigated the concentration of radon in 18 representative underground buildings in Chengdu and the residence time of relevant personnel. Preliminary find out the underground buildings in Chengdu workers affected by additional radon exposure. The report is as follows. The measurement method uses the scintillation method to meet the detection limit of 2Bq · m ~ (-3). When the radon concentration in the air is n × 10 ~ 2Bc · m -3, the deviation is within ± 5%. Sampling site from the wall 1m, 1.5m away from the ground, to avoid venting sampling, in order to ensure the consistency of the sample. After the sample was placed 3h, radon and progeny to be measured after balance. Measurement results Radon concentration in underground buildings in Chengdu (Schedule) The radon concentration in buildings of type a is lower than that of type b and type c, which is equal to that of type a