| 柳州地区建筑材料放射性水平及其致居民剂量 |
| 摘要点击 744 全文点击 906 |
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| 中文关键词 建材 柳州地区 放射性水平 |
| 英文关键词 radioactive level building materials Liuzhou area |
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| 中文摘要 |
| 本文采用全国统一方法,检测了广西柳州地区常用建材中226Ra、232Th、40K的比活度.以煤灰砖最高,石灰石最低。比活度依次为煤灰砖>粘土砖≈土壤>水泥>灰砂砖>混凝土制品>石灰石.经估算,煤灰砖致居民的有效剂量当量较大,为3.98mSv·a-1;其它各种建材致居民的有效剂量当量在0.23—1.01mSv·a-1之间,低于、等于或略高于本底. |
| 英文摘要 |
| Reported in this paper is an investigation on radioactive levels in building materials, from which the doses accepted by local residents were estimated in Liuzhou area, Guangxi Zhuang Autonomous Region. It lias been found that the specific activity (226Ra, 232Th, 40K) in coal-slag-made bricks is the highest, exceeding the limit value,and that of limestone is the lowest. The radioactive levels in order are coal-slag-made brick > clay brick ≈ earth > cement > concrete products > limestone. It have been estimated that the effective dose equivalent to the local residents from coal-slag-made bricks is 3.98 mSv/a, and those from other building materials are 0.23-1.01 mSv/a, equal to or slightly higher than background level. |
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