事故容错燃料包壳和芯块材料中子学分析  

Neutronics Analysis of Accident-Tolerant Cladding and Pellet Materials

作　　者：潘昕怿[1] 兰兵[1] 贾斌[1] 李铁萍[1] 韩向臻[1] 张春明[1] 

机构地区：[1]环境保护部核与辐射安全中心,北京100082

出　　处：《核电子学与探测技术》2016年第9期958-961,965,共5页Nuclear Electronics & Detection Technology

基　　金：国家科技重大专项(2013ZX06002001)资助

摘　　要：分别使用SCALE软件包和两种近似方法进行组件和堆芯中子学分析,进而对SiC、先进铁合金和钼等事故容错包壳材料以及U_3Si_2、U^(15)N和U-Mo等芯块材料进行中子经济性评价。结果表明:除了SiC外,金属包壳均有显著的中子惩罚,需通过提高燃料富集度或减少包壳厚度进行补偿;高密度芯块如U_3Si_2通常能够提高中子经济性,但由于过高的^(238)U含量,U^(15)N无明显经济性优势。SCALE software and two kinds of approximated methods are used for lattice and reactor core analysis respectively, based on which the neutron economy evaluation is performed for the accident -tolerant cladding materials including SiC, advanced steel alloy and Mo, and new pellet materials like U3Si2, U15N and U- Mo. The analysis results indicate that the metallic claddings have noticeable neutronie penalty, which should be compensated by thinner cladding or high fuel enrichment. High density pellets like U3Si2 can generally improve the neutron economy; however U15 N has no obvious economic advantage due to its high 238U content.

关 键 词：事故容错燃料 中子经济性 包壳 芯块 

分 类 号：TL352[核科学技术—核技术及应用]