CAJ | 학술논문

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。
SiO2열화효응가능대핵폐료지질저존고분석화공간반응퇴추락습사정황하적림계안전조성일정영향。본문결합최신적ENDF/B Ⅶ.1적TSL고，제작료ACE격식적SiO2열중자절면수거고。분석료불동온도대SiO2열중자산사절면적영향，비교료채용성자보모형적SiO2열중자산사절면수거여채용자유기체모형적SiO2열중자산사절면수거적차이，병채용본문제작적절면고，대공간퇴추락습사정황하적림계안전특성진행료분석，급출료반응퇴최역중반림계적습사성분비례。
T hermal neutron scattering of SiO2 may have the impact on analysis of the ge-ologic 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 investiga-ted .Comparison of SiO2 thermal neutron scattering cross sections between phonon mod-el 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 w as given .