摘要
堆芯内的核燃料在裂变过程中产生大量的放射性物质,ORIGEN-S可以采用多种数据库计算堆芯内放射性物质的积累和衰变,如Card-image数据库、二进制数据库以及ORIGEN-ARP通过插值产生的ORIGEN-S截面数据库。详细介绍了各数据库的基本情况,并采用Card-image数据库和ORIGENARP数据库,对比计算了反应堆堆芯放射性核素的活度,分析了典型核素的放射性活度随燃耗的变化。计算结果表明:不同数据库对各种核素的放射性活度计算产生了不同的影响,与Card-image库相比,采用ARP插值生成的数据库计算的小部分核素放射性活度偏大,而核素134 Cs、136 Cs放射性活度小15%左右。随着燃耗的加深,ORIGEN-S采用不同数据库计算的核素放射性活度差值逐渐增大,但核素放射性活度的比值随燃耗的增大呈现不同的变化规律。
The nuclear fuel in reactor core produces large amount of radioactive nuclides in the fission process.ORIGEN-S can calculate the accumulation and decay of radioactive nuclides in the core by using various forms of data libraries,including cardimage library,binary library and ORIGEN-S cross section library generated by ARP through interpolation method.In this paper,the information of each data library was described,and the reactor core inventory was calculated by using Card-image library and ARP library.The radioactivity concentration of typical nuclides with the change of fuel burnup was analyzed.The results showed that the influence of data libraries on the calculation of nuclide radioactivity was various.Compared to Card-image library,the radioactivity of a small part of nuclides calculated by ARP library were larger and the radioactivity of 134 Cs,136Cs were calculated smaller by about 15%.For some typical nuclides,with the deepening of fuel burnup,the difference of nuclide radioactivity calculated by the two libraries increased.However,the changes of the ratio of nuclide radioactivity were different.
出处
《核科学与工程》
CSCD
北大核心
2014年第4期475-481,487,共8页
Nuclear Science and Engineering
基金
科技部重大专项CAP1400安全评审技术及独立验证试验(2011ZX06002-010)
