基于ENDF/B-VII.0评价库的多群参数库MUSE1.0的开发与初步验证  

Verification and Validation of Multi-Group Library MUSE1.0 Created from ENDF/B-VII.0

作　　者：陈义学[1] 陈朝斌[2] 吴军[1] 杨寿海[1] 张斌[1] 陆道纲[1] 

机构地区：[1]华北电力大学核科学与工程学院,北京102206 [2]北京应用物理与计算数学研究所,北京100088

出　　处：《核动力工程》2010年第2期6-10,15,共6页Nuclear Power Engineering

基　　金：国家重点基础研究发展计划资助项目(2007CB209800);国家自然科学基金资助项目(10705011;10875042);长江学者和创新团队发展计划资助项目(IRT0720)

摘　　要：采用NJOY程序研制了基于ENDF/B-VII.0评价库的172群中子-42群光子多群截面库(MUSE1.0),该库的权重谱采用Vitanim-e谱,角分布采用勒让德P6近似;热散射数据由自由气体模型产生,共振自屏修正选择了10组背景截面。该库含有293、600、800、900 K等温度下的截面数据;采用GENDF、MATXS和ACE多群3种格式存储。采用MCNP程序,从临界计算和屏蔽计算两个方面对该库进行较全面检验。结果表明,MUSE1.0在临界计算以及屏蔽计算方面具有较强的通用性,对于热散射效应以及共振自屏效应具有较好地描述能力,可以满足超临界水堆概念设计研究方面的应用要求。A multi-group library set named MUSE1.0 with 172-neutron group and 42-photon group is produced based on ENDF/B-VII.0 using NJOY code.Weight function of the multi-group library set is taken from the Vitanim-e library and the max legendre order of scattering matrix is six.All the nuclides have thermal scattering data created using free-gas scattering law and 10 Bondarenko background cross sections se lected to generate the self-shielded multi-group cross sections.The final libraries have GENDF-format,MATXS-format and ACE-multi-group sub-libraries and each sub-library generated under 4 temperatures（293 K,600 K,800 K and 900 K）.This paper provides a summary of the procedure to produce the library set and a detail description of the validation of the multi-group library set by several critical benchmark devices and shielding benchmark devices using MCNP code.The ability to handle the thermal neutron transport and resonance self-shielding problems are investigated specially.In the end,we draw the conclusion that the multi-group libraries produced is credible and can be used in the RD process of Supercritical Water Reactor.Design.

关 键 词：ENDF/B-VII.0评价库 多群参数库 积分检验 MCNP程序 

分 类 号：TL32[核科学技术—核技术及应用]