滨海电厂海洋生物辐射影响评估

文章介绍了生物辐射影响评价的重要性、海洋生态环境调查内容和代表性生物的选取方法。生物辐射影响评估方法包括近年研究进展、评价模型、评价参数及剂量率筛选值等,并以我国某滨海压水堆核电厂址为例,采用ERICA模型评估该电厂两台百万千瓦机组正常运行工况下由液态放射性流出物排放所致厂址附近海洋生物的影响率、内外照射剂量率和总剂量率水平。结果表明,该电厂两台机组正常运行时,液态放射性流出物对厂址附近海洋生物所致影响率低于1,辐射剂量率均在10μGy·h-1以下。总体而言,厂址附近海洋生物所受辐射剂量率满足要求。

The paper introduces the importance of biota radiological impact assessment,the aquatic biota survey and representative biota choice method,radiological impact assessment method of the aquatic biotainclude the research development assessment model,assessment parameter and dose rate screen value etc,takes a coastal nuclear power plant as an example,the risk quotient,internal,external and total dose rate of the aquatic biota near NPP caused by the liquid effluents were calculated by ERICA model when two 100MW units operate normally.It was concluded that the risk quotient of aquatic biota near NPP caused by the liquid effluents was below 1 and the dose rate was below ERICA screen value 10μGy·h-1 when two 100 MW units operate normally.So the radiation impact on aquatic biota will satisfy related standards.