摘要
滨海核电厂流出物的排放会对周围公众产生照射,其中剂量贡献最大的放射性核素为^(14)C,又以食入海产品中^(14)C所致的剂量占比最高。在进行食入海产品这一关键途径的剂量评价时,海产品中^(14)C的浓集情况将直接影响剂量评价的合理性。本文采用比活度平衡模式,充分考虑福清核电厂址海域海水及海产品实际碳含量,计算出不同种类海产品^(14)C浓集因子,并通过与部分厂址海产品的^(14)C浓集因子实测值及国际原子能机构(IAEA)推荐值对比验证,得到了适用于福清核电厂址海域的海产品^(14)C浓集因子,推荐鱼类取6800、藻类取5300、甲壳类取5000、软体动物取4500,并应用于公众剂量评价,划分不同年龄组,计算出食入海产品中^(14)C所致的公众个人有效剂量。
Considering the exposure to the surrounding public caused by coastal nuclear power plant radioactive effluents,the largest contribution is caused by ^(14)C.During dose evaluation of the key route feeding from marine organisms,the ^(14)C concentration will directly affected the rationality.In this study,the specific activity equilibrium model was adopted,as well as consideration of the actual carbon content of sea water and marine organisms in Fuqing NPP.Calculating ^(14)C concentration factors of different species of marine organisms,which were verified by comparing with measured values and IAEA rec-ommended values of some marine organisms on sites.As conclusions,^(14)C concentration factors suitable for the Fuqing NPP area were obtained.It is recommended to take 6800 for fish,5300 for algae,5000 for crustaceans and 4500 for mollusks.They can be applied to public dose evaluation by dividing different age groups and calculate the public personal effective dose caused by ^(14)C intake from marine organisms.These recommended values can be applied to the assessment of the public radiation dose caused by the effluents from the coastal NPP.
作者
许莉萍
XU Liping(Fujian Fuqing Nuclear Power Co.Ltd.,Fujian Fuqing 350318)
出处
《辐射防护》
CAS
CSCD
北大核心
2024年第2期174-181,共8页
Radiation Protection
关键词
^(14)C
浓集因子
海产品
剂量评价
^(14)C
concentration factor
marine organisms
dose evaluation
