有色金属矿中氡及其子体浓度与评价

Levels of radon and its daughters and risk estimation in three nonuranium mines of Fujian.

本文报告了1986～1988年福建省宁化钨矿、福安钼矿和连城铅锌矿中氡及其于体浓度调查结果。在三个矿井申氡子体α潜能浓度以宁化钨矿为最高,平均值达4.26×10^(-5)J·m^(-3),比国家标准限值约高出4.5倍;钼矿和铅锌矿氡子体α潜能浓度分别为3.20×10^(-7)J·m^(-3)和5.94×10^(-7)J·m^(-3)。估计了三个矿各工种矿工肺部所受氡子体α潜能年暴露量以及终生肺癌危险度,并将其结果与国内外文献资料作了比较。

^(222)Rn and its daughters concentration in three nonuranium mines in Fujian were investigated. The mean concentration of Rn daughters ranged from 4.37×10^(-7)～3.75×10^(-5)J·m^(-3), the highest levels were found to be 7.3 ×10^(-7)～9.98×10^(-5)J·m^(-3). The mean concentration of radon daughters in Ninghua mine exceeded the permissible level for miners (8.3 ×10^(-6) J·m^(-3)) set by Chinese hygiene standards. The cumulative annual exposure doses to miners was 26.2 WLM in Ninghua mine. In addition, the incidences of lung cancer among the miners in three mines were estimated.