钍基熔盐堆用238群中子-48群光子耦合多群常数库的屏蔽基准验证  

Shielding Benchmarks of the 238-NEUTRON AND 48-Gamma Ray Coupled Group Constant Library for Thorium Molten Salt Reactor

作　　者：赵秋娟 吴海成[1] 吴小飞[1] 刘萍[1] 葛智刚[1] 

机构地区：[1]中国原子能科学研究院中国核数据中心,北京102413

出　　处：《原子核物理评论》2017年第3期682-690,共9页Nuclear Physics Review

摘　　要：采用OKTAVIAN脉冲球实验对钍基熔盐堆用AMPX主库格式238群中子-48群光子耦合多群常数库进行了屏蔽基准验证,重点检验了该库中的F,Li,Be,C、Al,Si,Cr,Ni,Zr,Co,Cu,Mn,Mo,Nb,Ti,W,Pb同位素/元素的数据。采用SCALE 5.1程序系统中的XSDRN-PM程序进行一维屏蔽问题计算,将计算结果与实验测量数据及MCNP程序计算结果进行比较,发现中子泄漏谱的符合程度较好,而光子泄漏谱检验中发现大多数核素都出现了不同程度的高估。通过对GENDF格式到AMPX格式的转换程序MILER-4进行修正,解决了这一问题。通过对多群常数库的屏蔽基准验证,进一步证明了该库的可靠性。OKTAVIAN pulsed sphere experiment was used for Shielding Benchmarks of the AMPX formatted multi-group（238 n-48γ） coupled neutron-gamma cross-section library for Thorium Molten Salt Reactor, of which the following isotopes/elements were checked—F, Li, Be, C, Al, Si, Cr, Ni, Zr, Co, Cu, Mn, Mo, Nb, Ti, W. One dimension shielding problem was calculated using XSDRN-PM program of SCALE 5.1 code system and results were compared with experiment results and MCNP calculated results, which shows that neutron leakage spectra agree well. Calculated results of photon leakage spectra of most facilities compared with MCNP results and experiment data are over-rated. MILER-4 code which is used for converting GENDF files produced by NJOY to the AMPX master library format is revised to solve this problem. The shielding benchmark verifications confirm the reliability of this new library.

关 键 词：AMPX格式 多群常数库 屏蔽基准验证 中子 光子泄漏谱 

分 类 号：TL426[核科学技术—核技术及应用]