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SiO_2热中子散射截面在空间堆事故分析中的应用 被引量：3

Application of SiO_2 Thermal Neutron Scattering Cross Sections in Space Reactor Accident Analysis
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摘要 SiO2热化效应可能对核废料地质储存库分析和空间反应堆坠落湿沙情况下的临界安全造成一定影响。本文结合最新的ENDF/BⅦ.1的TSL库,制作了ACE格式的SiO2热中子截面数据库。分析了不同温度对SiO2热中子散射截面的影响,比较了采用声子谱模型的SiO2热中子散射截面数据与采用自由气体模型的SiO2热中子散射截面数据的差异,并采用本文制作的截面库,对空间堆坠落湿沙情况下的临界安全特性进行了分析,给出了反应堆最易重返临界的湿沙成分比例。 Thermal neutron scattering of SiO2may have the impact on analysis of the geologic storage of nuclear waste and criticality safety of space reactor’s falling accident. The ACE format SiO2thermal neutron cross sections were generated by using the new TSL library of ENDF/B Ⅶ.1.Cross sections at different temperatures were investigated.Comparison of SiO2thermal neutron scattering cross sections between phonon model and free gas model was done.The space reactor’s criticality safety in wet sand was analyzed by using the new library,and the harmful moderating proportion of wet sand was given.
作者 王立鹏 江新标 赵柱民 陈立新
机构地区 西北核技术研究所
出处 《原子能科学技术》 EI CAS CSCD 北大核心 2014年第4期680-684,共5页 Atomic Energy Science and Technology
基金 国家自然科学基金资助项目(11275152)
关键词 SIO2 热化效应 空间堆事故 SiO2 thermal kernel effect space reactor accident
分类号 TL329.2 [核科学技术—核技术及应用]
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参考文献9

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二级参考文献10

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原子能科学技术
2014年 第4期

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