摘要
传统子群参数制作方法在单共振核素的条件下计算子群参数。然而,该方法中的单共振核素假设与燃料成分中多种核素并存的情况不相符,不能精确处理多核素之间的共振干涉效应。针对此问题,提出了一种新的子群参数制作方法,使用多核素等效截面制作共振积分表,在子群参数制作过程中考虑共振干涉效应。计算结果表明,在不改变子群计算方法的情况下,新的子群参数可更精确地处理共振干涉效应。
The traditional subgroup parameters are generated under the assumption that only one resonant nuclide is in the system.However,this assumption is not in accordance with the real condition of fuel pellet which may contain different kinds of nuclides,and the resonance interference effect can＇t be considered in this method.To solve this problem,a new calculation method of subgroup parameters was proposed in this paper.The effective cross sections of all resonant nuclides in the fuel were used to make the resonance integral table,and the resonance interference effect was treated during this procedure.The numerical results show that the new subgroup parameters have better accuracy for resonance interference treatment.
作者
李颂
张乾
赵强
李佩军
LI Song;ZHANG Qian;ZHAO Qiang;LI Peijun(Fundamental Science on Nuclear Safety and Simulation Technology Laboratory Harbin Engineering University,Harbin 150001,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2018年第7期1166-1173,共8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)
关键词
共振自屏
子群方法
共振干涉效应
超细群方法
resonance self shielding
subgroup method
resonance interference effect
ultra fine group method
