任意温度下H_2O中H中子热散射律数据研制  

Production of Thermal Scattering Law Data for H Bound in H_2O at Any Temperature

作　　者：胡泽华[1,2] 王佳[1,2] 师学明[1] 邓力[1,2] 孙伟力[1] Hu Zehua Wang Jia Shi Xueming Deng Li Sun Weili(Institute of Applied Physics and Computational Mathematics, Beijing, 100094, China CAEP Software Center for High Performance Numerical Simulation, Beijing, 100088, China)

机构地区：[1]北京应用物理与计算数学研究所,北京100094 [2]中物院高性能数值模拟软件中心,北京100088

出　　处：《核动力工程》2017年第3期34-37,共4页Nuclear Power Engineering

基　　金：中物院中子物理学重点实验室基金资助项目(2013BA01;2013AA02);能源局06重大专项(2015ZX06002008)

摘　　要：轻水反应堆堆芯模拟计算需在较宽的温度范围内进行,热中子能区(4eV以下)H_2O中H的热散射律数据对计算有很重要的影响。目前主流基础评价核数据库中,H_2O中H的热散射律数据均在有限的几个温度点上给出,因此计算只能在这些温度下精确进行。为提高轻水反应堆模拟计算的可靠性,基于IKE热中子散射模型,给出了293.6~1000 K范围内任意温度下H_2O中H的热散射律数据的计算方法,并制作了系列H_2O中H的温度间隔为10 K的热散射律数据。利用制作的热散射数据和MC输运计算程序,模拟分析HMF004基准实验和VENUS3轻水反应堆在不同慢化剂温度下的有效增殖因数(keff)。计算结果符合物理规律,验证了H_2O中H的热散射数据的制作是正确的。Calculations of light water reactor cores need to be implemented at a wide range of temperatures. In thermal energy range （below 4eV）, the thermal scattering law for H bound in H2O is with important effect on the calculations. In the current major evaluated nuclear data libraries, the thermal scattering laws for H bound in H2O are given at fixed temperatures. The calculations can only performed accurately at those temperatures. In order to improve the accuracy of the calculations of light water reactor cores, the methodology for the generation of the thermal scattering law data at any temperature in the range of 293.6-1000K based on the IKE model is introduced. A set of thermal scattering laws are generated on thetemperature grid at interval of 10 K. With the thermal scattering law data and MC transport code, the kerr of the benchmark models HMF004 and VENUS3 are calculated at various temperatures. The results show that the generation of the thermal scattering data is correct.

关 键 词：热散射律 H2O中H 评价核数据 有效增殖因数keff 慢化剂温度 

分 类 号：O643.1[理学—物理化学]