小型动力堆码头中破口失水事故大气扩散研究  

Atmospheric Dispersion Research of Mid-break LOCA for Small Reactor of Nuclear-powered Device in Dock

作　　者：王伟[1] 张帆[1] 陈力生[1] 晏峰 

机构地区：[1]海军工程大学核能科学与工程系,湖北武汉430033 [2]海军陆战学院陆战系,广东广州510430

出　　处：《原子能科学技术》2014年第11期2012-2016,共5页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(11075212)

摘　　要：采用高斯分段烟羽模型估算了某小型动力堆在码头内发生破口尺寸为29.4%当量直径的设计基准事故时,放射性核素在码头20km区域范围内的大气扩散规律。源项采用严重事故计算程序MELCOR仿真获得,并将计算结果输入到大气扩散分析软件MACCS进行分析计算。计算结果表明:中破口失水事故会造成码头区域的放射性污染,风速越小、气象条件越稳定,放射性的影响范围越大。Using the model of Gaussion subsection plume ,the radioactive nuclide atmos‐pheric dispersion rule in the terrain of 20 km of the coastal w as estimated w hen the design basis accident with 29.4% equivalent diameter break size happened .The source term was captured by the calculation program of severe accident named MELCOR ,and the result was used as input in the analysis software of atmospheric dispersion named MACCS .The results show that the mid‐break LOCA would lead to the radioactive pol‐lution for the area of dock .The slower the wind blows and the more steady the weather is ,the larger the radioactive polluted area is.

关 键 词：高斯分段烟羽模型 大气扩散 MELCOR MACCS 

分 类 号：TL326[核科学技术—核技术及应用]