HTR－10高温气冷实验堆事故放射性释放及对环境的影响

ACCIDENT RADIOACTIVE RELEASE AND ENVIRONMENTAL IMPACT FOR HTR-10 HIOH TEMPERATURE GAS COOLED EXPERIMENTAL REACTOR

本文介绍了ＨＴＲ－１０高温气冷堆可能发生的向环境释放较多放射性的三种事故的释放机制和释放量计算中的假设，并给出了释放量和对公众的辐射剂量的计算结果。这三种事故中，堆芯进水事故引起的公众辐射剂量最大，在离排放点２５０ｍ处公众个人受到的全身剂量为５．４４×１０￣（－１）ｍＳｖ，此剂量比核安全法规中规定的要采取隐蔽等场外应急措施的干预水平低１个量级。

The radioactive release mechanism and the assumptions used for evaluating thethree potential accidents,in which the radioactivities released to environment are much morethan other accidents for HTR-10 high temperature gas cooled experimental reactor ,are de-scribed in the paper.The radioactive release and dose to man are calculated.Among thethree accidents,the highest dose is caused by water ingress accident into core,and thewhole-body dose to man at the distance of 250 m is 5.44×10￣(-1) mSv, which is one order ofmagnitude less than emergency action level for sheltering stiputated by national nuclear safe-ty code.