深次临界反应性测量中的动力学畸变效应修正  

Deep Subcritical Levels Measurements Dependents upon Kinetic Distortion Factors

作　　者：盘世标[1] 李翔[1] 付国恩[1] 黄礼渊[1] 穆克亮[1] 

机构地区：[1]中国核动力研究设计院,成都610041

出　　处：《核动力工程》2013年第6期10-12,共3页Nuclear Power Engineering

基　　金：国家自然科学基金-青年基金项目(11105132);四川省科技支撑计划项目(2011FZ0055)

摘　　要：深次临界反应性测量中,随着次临界度的增加,中子注量率空间能谱分布偏离静态,由此产生的动力学畸变效应对次临界反应性测量产生影响。本文根据扩散理论分析次临界系统中子注量率空间能谱分布偏离的规律,并根据相对中子注量率计算动力学畸变效应修正因子。在零功率装置上进行4个不同棒态组合的次临界度测量试验。试验测量分析表明,随着次临界度的增加,动力学畸变效应修正因子从0.052逐渐增大到0.065,对应的反应性修正量为0.78eff^3.01eff,可见,深次临界反应性测量中对动力学畸变效应进行修正是必要的。The measurement of deep subcritical levels, with the increase of subcriticality, showed that the results impact on the kinetic distortion effect, along with neutron flux strongly deteriorated. Using the diffusion theory, calculations have been carded out to quantify the kinetic distortion correction factors in subcritical systems, and these indicate that epithermal neutron distributions are strongly affected by kinetic distortion. Subcriticality measurements in four different rod-state combination at the zero power device was carried out. The test data analysis shows that, with increasing subcriticality, kinetic distortion effect correction factor gradually increases from 1.052 to 1.065, corresponding reactive correction amount of 0.78βeff-3.01βeff Thus, it is necessary to consider the kinetic distortion effect in the deep subcritical reactivity measurements.

关 键 词：深次临界 脉冲源法 动力学畸变效应 

分 类 号：TL31[核科学技术—核技术及应用]