摘要
本研究全面评估2023年东海浙南段水流域的放射性水平,为即将运行的三澳核电站的环境监测和评估提供可靠的本底数据。对目标海域的海水、海洋生物及海底泥样品进行季度采集与分析,评估这些放射性核素在时间和空间上的变化。结果发现,浙南段水流域海水的氚活度在4个季度中表现出显著的季节性变化,分别为0.33 Bq/L、0.38 Bq/L、0.39 Bq/L和0.26 Bq/L,α核素活度也呈现季节性波动,全年平均活度为0.03 Bq/L;生物样的氚活度较低;海底泥中γ核素活度范围为:238U(1.61~9.32 Bq/kg)、232Th(1.53~7.29 Bq/kg)、226Ra(1.08~8.48 Bq/kg)、40K(2.73~8.72 Bq/kg)、137Cs(1.02~9.29 Bq/kg);洋流的季节性变化明显影响了放射性核素的迁移和累积。放射性物质的时空变化表明,核素在海洋中的行为受复杂的环境因素控制,如洋流、气温和降水等影响。
The study aimes to comprehensively assess the radioactive levels in the East China Sea,Zhejiang South section in 2023,to provide reliable baseline data for the environmental monitoring and evaluation of the upcoming San'ao Nuclear Power Station.Quarterly collection and analysis of seawater,marine organisms,and seabed sediment samples from the target maritime area were performed to evaluate temporal and spatial variations in radioactive nuclides.The results revealed that the tritium activity in the seawater of the Zhejiang South section exhibited significant seasonal changes across four quarters,with activities of 0.33 Bq/L,0.38 Bq/L,0.39 Bq/L,and 0.26 Bq/L,respectively.The activity of alpha nuclides also exhibited seasonal fluctuations,with an annual average activity of 0.03 Bq/L.The tritium activity in the biological samples was low.The activity range of gamma nuclides in seabed sediment was as follows:238U(1.61‒9.32 Bq/kg),232Th(1.53‒7.29 Bq/kg),226Ra(1.08‒8.48 Bq/kg),40K(2.73‒8.72 Bq/kg),and 137Cs(1.02‒9.29 Bq/kg).Seasonal changes in ocean currents significantly affected the migration and accumulation of radioactive nuclides.The spatiotemporal variations in radioactive substances indicate that the behavior of nuclides in the ocean is controlled by complex environmental factors,such as ocean currents,temperature,and precipitation.
作者
王天姿
刘晓冬
万新龙
任世刚
陈海滨
WANG Tianzi;LIU Xiaodong;WAN Xinlong;REN Shigang;CHEN Haibin(School of Public Health,Wenzhou Medical University,Wenzhou 325035,China;South Zhejiang Institute of Radiological Medicine and Nuclear Technology Application,Wenzhou 325809,China)
出处
《辐射研究与辐射工艺学报》
2025年第2期118-126,共9页
Journal of Radiation Research and Radiation Processing
基金
苍南县科技局重大社会科技项目(苍科[2022]23号)。
关键词
东海
放射性核素
氚
α核素
γ核素
East China Sea
Radionuclides
Tritium
α radionuclides
γ radionuclides
