| 陈英民,李海亮,宋钢,毕明卫,万恩广,李明刚,李明言.山东省非铀矿山氡浓度测量及所致矿工剂量[J].中华放射医学与防护杂志,2009,29(2):178-180 |
| 山东省非铀矿山氡浓度测量及所致矿工剂量 |
| Measurement of radon concentration and dose assessment of miners for non-uranium mines in Shandong Province |
| 投稿时间：2008-09-17 |
| DOI：10.3760/cma.j.issn.0254-5098.2009.02.021 |
| 中文关键词: 非铀矿山 氡 累积测量 年有效剂量 |
| 英文关键词:Non-uranium mines Radon Time_integrating measurement Annual effective dose |
| 基金项目:科技部科研院所社会公益研究专项(2005DIB1Z087) |
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| 中文摘要: |
| 目的 调查山东省典型非铀矿山井下222Rn浓度并估算矿工接受年有效剂量。方法 利用固体径迹探测器CR-39累积测量金矿、铁矿、煤矿井下220Rn、222Rn浓度,利用高纯锗γ谱仪分析矿石226Ra、232Th、40K活度浓度。结果 山东非铀矿山井下220Rn浓度平均值由高到低依次为金矿、铁矿、煤矿、黏土矿,分别为1200、280、120和40 Bq/m3;煤矿、金矿、黏土矿和铁矿的226Ra、232Th、40K活度浓度基本处于我国土壤天然放射性核素浓度范围内;222Rn及其子体所致井下矿工年有效剂量,金矿最高为7.7 mSv,铁矿次之,为1.7 mSv,煤矿和黏土矿均低于1 mSv。结论 金矿和铁矿应采取加大通风能力等措施降低井下氡浓度,井下矿工应该作为职业照射人员进行管理。 |
| 英文摘要: |
| Objective To measure 222Rn and 220Rn concentrations in the underground non-uranium mines in Shandong Province, and to estimate the annual effective dose to the miners. Methods Concentrations of 222Rn and 220Rnin selected gold, iron, coal and clay mines were determined by passive time_integrating detectors with CR-39. Activity concentrations of 226Ra, 232Th and 40K were determined using gamma spectrometry equipped with HPGe detector. Results The average concentrations of 220Rnin the gold, iron, coal and clay mines were estimated to be 1200, 280, 120 and 40 Bq/m3, respectively. The activity concentrations of 226Ra,232Th,40K in the ores for gold, iron, coal and clay mines ranged the same as the soil in China. The annual effective dose due to radon exposure in gold and iron mine was 7.70 mSv and 1.74 mSv, respectively. The annual doses received by miners in the coal and clay mines were lower than 1 mSv. Conclusions Underground miners in some gold and iron mines should be treated as workers occupationally exposed to ionizing radiation. The measurement such as increasing ventilation should be implemented to reduce underground radon concentration in these mines. |
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