摘要
基于等价理论通过预制的共振积分表来插值产生具体问题共振能区有效截面的方法是反应堆物理计算中传统的共振处理方法,有着十分广泛的应用。为弥补传统方法在处理空间效应和多核共振干涉效应方面尚存在的不足,本文以SCALE软件包中的CENTRM和NITAWL共振处理模块为工具,研究探讨了一种简便易行的改进措施,有望在今后的堆芯计算中得到应用。
It is well-established in reactor physics calculations that problem-dependent effective resonance cross-sections for a heterogeneous system are generated by applying the equivalence theory via interpolating the pre-generated resonance integral table for homogeneous systems.In order to address the defects of this method for the treatment of spatial effect and resonance interference effect,we propose an effective but simple improvement by introducing an additional correction factor.By virtue of the two resonance self-shielding calculation modules of the SCALE package,i.e.,CENTRM and NITAWL,we demonstrate that the introduced correction factor changes monotonically with the number density ratio between moderator and nuclear fuel,which will greatly facilitate the future application of this factor and makes the proposed improvement more promising.
出处
《核科学与工程》
CSCD
北大核心
2010年第3期204-209,共6页
Nuclear Science and Engineering
基金
国家自然科学基金资助项目(10975098)
