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报导了切尔诺贝利核电站事故后苏州市环境介质中~(134,137)Cs含量变化和剂量评价。结果表明,核事故后的1986年5月14～20日期间环境介质中~(134,137)Cs含量达到最大值,三个月后逐渐降低并趋于本底水平。峰值期间由空气浸没外照射、空气吸入和叶类蔬菜摄入内照射所致居民个体(成人)有效剂量当量是1.6×10~(-7)Sv,该值为事故后第一年2.9×10~(-7)Sv/a的55％,接近正常年份值1.5×10~(-7)Sv/a,其中食入途径约占90％,吸入途径约占8.6％,外照射途径很小。
Reported the change of ~ (134,137) Cs content in environmental media and dose assessment in Chernobyl after a nuclear accident. The results show that after the nuclear accident, the content of ~ (134,137) Cs reaches the maximum in the environmental medium from May 14 to May 20, 1986, and gradually decreases to the background level after three months. The effective dose equivalent of inhabitants (adults) induced by air immersion, air inhalation and internal irradiation of leafy vegetables during the peak period was 1.6 × 10 -7 Sv, which was 2.9 × 10 in the first year after the accident ~ (-7) Sv / a, which is close to normal value of 1.5 × 10 ~ (-7) Sv / a, of which about 90% are ingested, 8.6% are inhaled, and the external exposure route is very small.