三级筛选法检测水生生物辐射剂量

Detection of Radiation Dose in Aquatic Organisms by Three-Stage Screening

利用RESRAD-BIOTA程序,采用三级筛选法对某滨海核电厂8种类型水生生物的辐射影响进行了预测分析。结果表明,水生生物的辐射剂量主要由内照射构成,内照射剂量高于外照射剂量2个数量级;随着生物体个体的增大,内照射剂量逐步增大,而外照射剂量逐步减小;水生生物的辐射剂量主要由^(14)C、^(137)Cs和^(134)Cs构成,随着生物个体的增大,^(14)C所占的照射剂量份额逐步降低,^(137)Cs和^(134)Cs所占的照射剂量份额逐步增高。

The radiological impact of 8 types aquatic organisms near a coastal nuclear power plant was evaluated through three-stage screening method by RESRAD-BIOTA.The result shows that,the radiation dose of aquatic organisms is mainly composed of internal exposure,internal radiation dose is higher than external exposure dose of two orders of magnitude;with the increase of individual organisms,internal radiation dose increases gradually,and external dose reduced gradually;radiation dose of aquatic organisms is mainly made up of^(14)C and^(137)Cs.