某涉氚操作实验室源项调查活动对人员和环境的影响

Effect on Worker and Environment in Survey of Source Term for Decommission Tritium Laboratory

摘要: 在某涉氚实验室退役前期，为获得其中的放射性物质和其他有毒有害物质的信息，开展了源项调查。在源项调查活动中，根据该实验室的具体情况，采取了适当的辐射防护措施，并对从事该源项调查的工作人员和周围居民所受的放射性危害进行了监测和分析。结果表明：此次源项调查活动对该实验室所在的厂址环境有一定的影响，实验室外10 m范围内空气中的HTO略有升高，植物中氚含量明显提高，河水中的氚浓度均有一定程度的上升，但环境中的总α、总β仍处于当地本底水平范围；在进行源项调查期间，工作人员因氚所致的内照射最大值为0.111 mSv，公众所受的个人剂量为7.750×10^-5mSv。

Abstract: The survey of the source terms was carried out before a tritium laboratory decommission. The radiation protection for the action was reported based on the lab condition, and the radiation dose of the worker and the people who lived around were analyzed. The results show that the investigation has a little influence for the lab environment. During the actions the maximum value of radiation internal dose for worker is 0.111 mSv from HTO, and it’s 7.750×10^-5 mSv for the people who lived around the lab.