【摘要】 中国原子能科学研究院周围植物叶上发现１３１Ｉ含量超标后，通过实验找出超排原因是１３１Ｉ生产过程中控制不够严格造成的。故提出了改进生产工艺、废液贮存后排出及安装活性碳过滤器等控制１３１Ｉ排放量的措施。对这些措施进行代价－利益分析后，付诸实施。对治理后７年（１９８２—１９８８）的运行过程进行监测，结果表明，这些措施有效地控制了１３１Ｉ排放，在１３１Ｉ生产量不断增加的情况下，使年均总排放量降低１７倍，充分证明这些措施符合辐射防护最优化的原则。更多还原

【Abstract】 I quantity in/on the leaves of plants around CIAE was found exceeding the GB 54 81 limit in 1979, so experiments are performed to investigate the causes and some measures for reducing 131 I release are suggested, such as improving the production process, adopting a high level 131 I liquid waste small storage tank at site for delay release, and installing a small charcoal fillter in the off gas discharge pipe of the 131 I production shop. The cost for these measures are analysed. The 7 year operating results indicate that the release quantity of 131 I has been effectively reduced to 18% of the GB 54 81 limit, although the total 131 I production is on the increase year by year. It is concluded that these measures meet well the ALARA rule.更多还原