摘要
输运修正(TC)被广泛应用于堆芯输运求解中,但是在中子各向异性较强时精度较差。本文基于TC和通量矩修正技术(MHT),提出了输运修正-通量矩均匀化群常数计算方法(TC-MHT),将线性各向异性和角度依赖性信息引入到P0截面,并开展确定论程序的堆芯求解。利用微型热管微堆MegaPower基准堆芯验证了该方法的有效性。在反应性计算中,误差低于160pcm(1pcm=10^(-5)),显著优于体积-通量群常数的计算结果。在功率计算中,燃料棒功率误差在4%以内。表明本文提出的TC-MHT可以生成高精度的多群截面并应用于确定论程序中。
The transport correction(TC)method,while widely employed in core transport calculations,exhibits diminished accuracy under strongly anisotropic neutron scattering conditions.In this study,a TC-MHT method based on continuous energy Monte-Carlo is developed by integrating TC with flux-moment homogenization technique(MHT),which introduces linear anisotropy and angular dependency into P0 cross-sections for deterministic core simulations.This method is validated using the MegaPower benchmark.In reactivity calculations,the bias is reduced to less than 160 pcm(1pcm=10^(-5))by using the TC-MHT method,significantly outperforming volume-flux weighted group constant results.In power calculations,the maximum pin-by-pin power distribution deviation is within 4%.These results demonstrate that the proposed TC-MHT method can produce high-fidelity multi-group cross-sections suitable for application in deterministic codes.
作者
沈宇阳
吴逸炜
郭辉
宋去非
Shen Yuyang;Wu Yiwei;Guo Hui;Song Qufei(Shanghai Jiao Tong University,Shanghai,200240,China)
出处
《核动力工程》
北大核心
2025年第S2期1-7,共7页
Nuclear Power Engineering
基金
国家自然科学基金(12475178)
中核集团领创基金。
