核动力平台事故后^(137)Cs泄漏排放方式模拟研究  

Simulation of ^(137)Cs leakage emission mode after nuclear power platform accidents

作　　者：胡知临 叶枫 鲍萍 陈君军[1] 龚军军[1] HU Zhilin;YE Feng;BAO Ping;CHEN Junjun;GONG Junjun(Naval Univ.of Engineering,Wuhan 430033,China;Zhongnan Institute of Safety and Environment Technology Co.,Ltd.,Wuhan 430061,China)

机构地区：[1]海军工程大学,武汉430033 [2]中南安全环境技术研究院股份有限公司,武汉430061

出　　处：《海军工程大学学报》2025年第2期99-104,共6页Journal of Naval University of Engineering

基　　金：海军工程大学自主立项基金资助项目(2022506050)。

摘　　要：针对核动力平台在近岸海域突发事故后放射性物质泄露排放问题,以某近岸海湾为例,利用MIKE21水动力软件建立了近岸海湾的水动力模型。基于该模型,模拟计算研究了在近岸海湾的某点位,以一次性全部排放和连续均匀排放两种方式,释放长半衰期放射性物质^(137)Cs在海洋中的迁移扩散情况,并研究了扩散模拟结果与水面高程、水流流速两种水文条件之间的关系。研究结果表明:在典型半日潮时段内,相比于将放射性物质一次性全部排放到水体中,物质以连续均匀排放方式释放,对水体环境影响范围更小,排放后等时段内相对浓度更低;释放物质浓度和水面高程、水体流速之间呈一定负相关关系。该模拟结果可为核动力平台事故应急和海洋环境影响评价提供一定的参考价值。Aiming at the problem of radioactive material leakage and discharge from nuclear power platforms after sudden accidents in the nearshore waters,an inshore bay was taken as an example,and the MIKE21 hydrodynamic software was used to establish the hydrodynamic and diffusion model of the research area.Based on the established hydrodynamic model,the migration and diffusion of long-half-life radioactive material ^(137)Cs released by a random point in the inshore bay in two ways,i.e.,one time total discharge and continuous uniform discharge,and the relationship between the diffusion simulation results and the two hydrological conditions of water surface elevation and flow velocity were studied.The research shows that during typical half-diurnal tide period,the radioactive substances released in a continuous and uniform discharge mode have a smaller impact on the sea,and the relative concentration at the same time after discharge is lower compared with all radioactive substances discharged into the sea at one time;and that there is a certain negative correlation between the simulated concentration of released substances and the water surface elevation as well as the water velocity.The simulation results have some reference value for coping with emergency situation of nuclear power platform accidents and for marine environmental impact assessment.

关 键 词：核动力平台 MIKE21软件 排放方式 水文条件 

分 类 号：X55[环境科学与工程—环境工程]