NECP-Atlas中屏蔽数据库制作模块的开发与验证  

Development and Verification of Shielding Database Generation Module in NECP-Atlas

作　　者：祖铁军[1] 徐宁 曹良志[1] 吴宏春[1] Zu Tiejun;Xu Ning;Cao Liangzhi;Wu Hongchun(School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an,710049,China)

机构地区：[1]西安交通大学核科学与技术学院,西安710049

出　　处：《核动力工程》2022年第3期15-20,共6页Nuclear Power Engineering

基　　金：国家自然科学基金(12075183)。

摘　　要：在核数据处理程序NECP-Atlas中开发了屏蔽数据库制作模块Shield_calc,该模块先利用NECPAtlas产生问题无关的MATXS格式细群中子、光子截面数据库;然后采用超细群方法、Bondarenko迭代方法进行共振自屏计算,获得有效自屏截面;最后,基于1维反应堆模型采用NECP-Hydra进行输运计算获得应用堆型的典型权重谱,将细群屏蔽数据库归并为宽群屏蔽数据库NECL-SHILED。利用Shield_calc模块,基于与BUGLE-B7相同的评价核数据库ENDF/B-Ⅶ.0,制作了47群中子、20群光子的NECL-SHILED,并与BUGLE-B7进行了对比,数值结果显示NECL-SHILD与BUGLE-B7计算结果吻合较好,验证了Shield_calc模块具有较高的精度。The shielding database generation module Shield_calc is developed in the nuclear data processing program NECP-Atlas.This module firstly uses NECP-Atlas to generate a database of fine-group neutron and photon cross sections in MATXS format which is irrelevant to the problem;then uses the ultrafine group method and Bondarenko iterative method to perform resonance self-shielding calculation to obtain effective self-shielding cross-sections;Finally,based on the one-dimensional reactor model,NECP-Hydraa is used for transportation calculation to obtain the typical weight spectrum of the applied reactor type,and the fine-group shielding database is merged into the wide-group shielding database NECL-SHILED.Using Shield_calc module,based on the same evaluation nuclear database ENDF/B-Ⅶ.0 as BUGLE-B7,NECL-SHILED with 47 groups of neutrons and 20 groups of photons is generated and compared with BUGLE-B7.The numerical results show that the calculation results of NECL-SHILD and BUGLE-B7 are in good agreement,which verifies that the Shield_calc module has high accuracy.

关 键 词：屏蔽数据库 核数据处理 BUGLE-B7 NECP-Atlas NECL-SHILED 

分 类 号：TL325[核科学技术—核技术及应用]