^(238)U非均匀共振积分表的可行性分析  

Feasibility Study of Heterogeneous Resonance Integral Table of ^(238)U

作　　者：张乾 李颂 赵强 吴宏春[2] 庄坤 ZHANG Qian;LI Song;ZHAO Qiang;WU Hongchun;ZHUANG Kun(Fundamental Science on Nuclear Safety and Simulation Technology Harbin Engineering University,Harbin 150001,China;School of Nuclear Science and Technology,Xi＇ an Jiaotong University,Xi＇ an 710049;Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]哈尔滨工程大学核安全与仿真技术国防重点学科实验室,黑龙江哈尔滨150001 [2]西安交通大学核科学与技术学院,陕西西安710049 [3]南京航空航天大学,江苏南京211106

出　　处：《原子能科学技术》2018年第7期1174-1180,共7页Atomic Energy Science and Technology

基　　金：中央高校基本科研业务费专项资金资助项目(GK2150260130)

摘　　要：随着新一代反应堆设计的复杂化以及共振计算精度要求的提升,有必要在多群数据库中引入非均匀共振积分表来提升共振计算精度。对不同方案制作的238 U核素非均匀共振积分表在嵌入式共振计算方法中的应用进行了精度分析,分析结果表明,慢化剂密度与硼浓度是非均匀共振积分在工程应用中必须考虑的因素。根据分析结果,改进了国际上现有的二维非均匀共振积分表,使用四维插值表来覆盖压水堆中可能出现的工况。数值结果表明,改进的238 U非均匀共振积分表提高了共振计算的精度,提高了核数据库的适用性。As the complexity and accuracy requirement increase of neutronics calculation of the next generation reactor,it is necessary to introduce the heterogeneous resonance integral table into the multi-group cross section library replacing the homogeneous resonance integral table. The accuracy of embedded self-shielding calculation using heterogeneous resonance integral tables of 238 U prepared in different schemes was analyzed.The results show that the density of the moderator and the concentration of boron are crucial in the practical application of heterogeneous resonance integrals.Based on the analysis results,the current scheme of the 2 Dheterogeneous resonance integral table was improved by a 4 Dinterpolation table to cover all possible operating conditions of PWR.Numerical results show that the improved heterogeneous resonance integral table enhances the accuracy of resonance calculation and improves the applicability of the multi-group library.

关 键 词：共振计算 共振积分 非均匀系统 多群库 

分 类 号：TL324[核科学技术—核技术及应用]