| 沈阳地区环境放射性水平及切尔诺贝利核电站事故影响 |
| 摘要点击 869 全文点击 864 投稿时间：1990-02-12 |
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| 中文关键词 放射性水平 核电站事故 沈阳地区 |
| 英文关键词 environmental radioactivity Chernobyl accident Shenyang |
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| 中文摘要 |
| 本文报道1981-1987年沈阳地区环境介质中总β、90Sr、137Cs、131I、U、Th、226Ra、40K的放射性水平。1986年4月26日切尔诺贝利核电站事故后,于5月13日放射性沉降物中有大量的总β和131I,其值分别为131.0Bq/m2·d和281.2Bq/m2·d。牛奶和蔬菜中131I最高值分别为5.1Bq/L和48.1Bq/kg.这就说明,环境已被污染诺贝利核电站事故放射性沉降物所污染。估算了沈阳居民甲状腺的剂量,成人甲状腺有效剂量当量小于2μSv,婴儿小于11pSv,均低于国家放射卫生防护标准的剂量限值。 |
| 英文摘要 |
| This paper deals with the radioactive levels of gross β, 90Sr, 137Cs, 131I,U,Th,226Ra,40K in some environ-mental media in Shenyang area during 1981-1987. After Chernobyl accident on April 26, 1986, large amounts of gross β and 131I were found in radioactive fallout on May 13 of that year, their values were 131 Bq/m2.d and 281.2 Bq/m2.d respectively. The highest value of 131I in milk was 5.1 Bq/L and that in spinach 48,1 Bq/ kg. So It is shown that the environment was affected by Chernobyl accident. However, the residents' thyroid doses in the area were estimated, and the effective dose equivalents for adults were less than 2 μSv, and for infants less than 11 μSv not beyond the dose limits, according to "Basic Sanitary Standard for Radioactive Protection". |
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