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| 某铀矿山废石场及尾砂库氡污染调查 |
| Investigation of Radon Pollution of Waste-rock Yard and Tailing Sand Reservoir of A Uranium Mine |
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| DOI： |
| 中文关键词: 氡析出率 内照射剂量 年有效剂量当量 铀矿山 |
| 英文关键词: Radonemanation rate Interirradiation dose Annualeffectivenormaldose Uranium mine |
| 基金项目: |
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| 中文摘要: |
| 通过对某退役铀矿山的14个废石堆放场及3个尾砂库氡析出率的测量及内照射剂量的估算, 表明 , 只有一个废石场的氡析出率超过国家规定的管理限值水平; 尾砂库的氡析出率较高, 个别测点的氡析出率超出管理限值水平近7倍; 因氡析出而使当地居民额外所受的年最大有效剂量当量为0 .058 mSv。指出在尾砂库表面覆盖黄土, 可以有效降低氡析出水平, 当覆盖厚度达0.5 m 时, 可将氡析出水平降低84% 以上。 |
| 英文摘要: |
| Theradonemanation rateof14 waste-rockyardsand 3tailingsandreservoirsofaretired uranium mine w as determined,andinterirradiation dose wasestimated. Theresultindicatedthatonlyone w aste-rock yard c sradon emanation rateexceededtherestrictivevaluestipulated bystate. Theradon emanation rateoftailing sand reservoirs w as 7times morethan restrictive valuein average. Theradon emanation contributed an extraradiation normaldoseof0 1 058mSv annual. Tocoverthesurfaceof tailingsand reservoirs withloesscanreduceradon emanationeffectively. Whenthe depthofcoverloess was0.5m,radon emanation wasdecreased morethan 84%. |
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