| SiO2热中子散射截面在空间堆事故分析中的应用 |
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| 引用本文： | 王立鹏,江新标,赵柱民,陈立新.SiO2热中子散射截面在空间堆事故分析中的应用[J].原子能科学技术,2014,48(4):680-684. |
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| 作者姓名： | 王立鹏 江新标 赵柱民 陈立新 |
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| 作者单位： | 西北核技术研究所，陕西 西安710024 |
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| 基金项目： | 国家自然科学基金资助项目(11275152) |
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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/B Ⅶ-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。
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| 关 键 词： | SiO2" target="_blank">2')">SiO2 热化效应 空间堆事故 |
Application of SiO2 Thermal Neutron Scattering Cross Sections in Space Reactor Accident Analysis |
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| WANG Li-peng,JIANG Xin-biao,ZHAO Zhu-min,CHEN Li-xin.Application of SiO2 Thermal Neutron Scattering Cross Sections in Space Reactor Accident Analysis[J].Atomic Energy Science and Technology,2014,48(4):680-684. |
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| Authors: | WANG Li-peng JIANG Xin-biao ZHAO Zhu-min CHEN Li-xin |
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| Affiliation: | Northwest Institute of Nuclear Technology, Xi’an 710024, China |
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| Abstract: | Thermal neutron scattering of SiO2 may have the impact on analysis of the geologic storage of nuclear waste and criticality safety of space reactor’s falling accident. The ACE format SiO2 thermal 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 SiO2 thermal 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. |
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| Keywords: | SiO2 thermal kernel effect space reactor accident |
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