【摘要】 本文报道了用α闪烁罐法对北京市民用气体燃料（包括天然气、焦炉煤气、重油裂解气、液化石油气和农家沼气）中²²²Rn 浓度的测量结果。结果表明,上述气体中。²²²Rn 浓度的平均值分别为73、87、24、10和233Bq·m^-3。根据民用燃气日消耗量估算了北京市由于民用燃烧的气体每年向环境释放²²²Rn 的总量为3.5×10¹⁰Bq,其中焦炉煤气占85%,重油裂解气占9%,液化石油气的贡献甚微。同时估算了不同气体燃料对室内²²²Rn 浓度的贞献及对居民所致的年有效剂量当量。更多还原

【Abstract】 ²²²Rn concentrations of 69 samples from six civil fuel gasess collected in Beijing during 1987 have been measured.²²²Rn concentrations in natural gas,coking gas,liquefied petroleum gas,split-heavy-oil gas,and marsh gas are 73,87,24,10,and 233Bq·m^-3 respe-ctively.When1 burned in houses for cooking,these gases release radonand make indoor radon level to enhance.Based on the consumptionamount of the gases in Beijing during one year,it is estimated that²²²Rn released from gas burning is 3.5×10¹⁰ Bq and that the extraannual effective dose equivalent to resident is 0.09—15μSv·a^-1.更多还原