彭超,丁谦学,梅其良,付亚茹

• 1:上海核工程研究设计院有限公司

摘要(Abstract)：

基于最新发布的评价数据库ENDF/B-Ⅷ.0、FENDL-3.1D和EAF-2010开发了一个压水堆(PWR)用燃耗库BURN.SNERLIB,用于ORIGEN-S程序。此数据库由三部分组成:衰变数据、裂变产额数据和截面数据,其格式与ORIGEN-S自带压水堆数据库的格式保持一致。衰变数据选取MF=8文档中的MT=457反应数据进行加工;裂变产额数据共考虑了30种可裂变锕系核素,由特定入射能量下MT=454和MT=459反应数据加工得到;截面数据采用三群结构,首先基于典型压水堆燃料棒栅元在指定燃耗深度下的输运计算获得燃料区域内逐点中子能谱,以此逐点中子谱为权重谱通过NJOY程序将ENDF/B-Ⅷ.0等评价库中的连续截面制作成精细群截面,对精细群截面进行并群计算生成三群截面。利用OECD/NEA公布的压水堆基准题进行了验证,验证了此方法加工ORIGEN-S燃耗库的正确性。分析结果表明,对于某些燃耗计算重要核素,如238 Pu等,基于最新评价库开发的数据库比自带库的计算结果更接近于实验值,提升了ORIGEN-S的计算精度。

关键词(KeyWords)： ORIGEN-S;燃耗库;NJOY;三群截面

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 彭超,丁谦学,梅其良,付亚茹

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