| 空间离散对弥散颗粒燃料燃耗计算的影响 |
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| 引用本文： | 娄磊,张云飞,李满仓,张乾,李颂,梁越超,赵强,张志俭.空间离散对弥散颗粒燃料燃耗计算的影响[J].原子能科学技术,2021,55(5):856-864. |
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| 作者姓名： | 娄磊 张云飞 李满仓 张乾 李颂 梁越超 赵强 张志俭 |
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| 作者单位： | 中国核动力研究设计院 核反应堆系统设计技术重点实验室，四川 成都610213；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 |
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| 摘 要： | 单栅元燃耗计算是全堆芯燃耗计算的基础，栅元空间离散对燃耗计算的结果有显著影响。弥散颗粒燃料由于双重非均匀性的存在，空间离散的情况更为复杂。本文基于ALPHA组件程序，分析了颗粒在平源区上归类的宏观离散方案与颗粒内部细分燃耗区的微观离散方案对弥散颗粒燃料燃耗计算的影响。算例包括无毒物的UC颗粒单栅元，含Gd2O3层的QUADRISO颗粒单栅元和含UC颗粒与Gd2O3毒物颗粒的双颗粒单栅元。数值结果表明，无毒物栅元宏观需分3圈以上，含Gd2O3栅元宏观需分5圈以上；无毒物算例微观不需要分圈，含Gd2O3层的QUADRISO颗粒需在微观燃料区细分2圈，双颗粒问题的Gd2O3毒物颗粒微观需分12～15圈。
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| 关 键 词： | 双重非均匀性 燃耗计算 弥散颗粒燃料 空间离散 |
Influence of Spatial Discretization on Burnup Calculationof Dispersed Particulate Fuel |
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| LOU Lei,ZHANG Yunfei,LI Mancang,ZHANG Qian,LI Song,LIANG Yuechao,ZHAO Qiang,ZHANG Zhijian.Influence of Spatial Discretization on Burnup Calculationof Dispersed Particulate Fuel[J].Atomic Energy Science and Technology,2021,55(5):856-864. |
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| Authors: | LOU Lei ZHANG Yunfei LI Mancang ZHANG Qian LI Song LIANG Yuechao ZHAO Qiang ZHANG Zhijian |
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| Affiliation: | Science and Technology on Reactor System Design Technology Laboratory,
Nuclear Power Institute of China, Chengdu 610213, China;Fundamental
Science on Nuclear Safety and Simulation Technology Laboratory, Harbin
Engineering University, Harbin 150001, China |
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| Abstract: | Pin cell burnup calculation is the basis of the whole core burnup
calculation. The spatial discretization of burnup region has significant
influence on the accuracy of burnup calculation. The spatial
discretization of dispersed particulate fuel is more complicated due to
the double heterogeneity. Based on the lattice physics code ALPHA, the
effect of macroscopic discretization at pin level and microscopic
discretization at particle level was analyzed. Cases included UC
particle pin cell, Gd2O3-layered QUADRISO particle pin cell and a
double-particle pin cell filled with Gd2O3 particles and UC particles.
The numerical results show that case without poison should set at least 3
macroscopic burnup regions while cases with Gd2O3 need at least 5
macroscopic burnup regions. No microscopic discretization is required
for case without poison. QUADRISO particle containing Gd2O3 layer should
set 2 microscopic burnup regions in the fuel region, and the Gd2O3 particle of double-particle cell need 12-15 microscopic burnup regions. |
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| Keywords: | double heterogeneity burnup calculation dispersed particulate fuel spatial discretization |
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