Determination of fuel burnup distribution of a research reactor based on measurements at subcritical conditions  

作　　者：Quang Binh Do Hoai-Nam Tran Quang Huy Ngo Giang T. T. Phan 

机构地区：[1]Ho Chi Minh City University of Technology and Education,1 Vo Van Ngan, Thu Duc, HCMC, Vietnam [2]Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh city, Vietnam

出　　处：《Nuclear Science and Techniques》2018年第12期30-38,共9页核技术（英文）

基　　金：supported by National Foundation for Science and Technology Development(NAFOSTED)of Vietnam under Grant103.04-2016.30

摘　　要：This paper presents the determination of the fuel burnup distribution of the Dalat nuclear research reactor(DNRR) using a method of measurements at subcritical conditions. The method is based on the assumption of linear dependence of the reactivity on the burnup of fuel bundles and the measurements at subcritical conditions.The measurements were taken for seven selected fuel bundles in two different measuring sequences. The measured burnup values have also been compared with the calculations for verifying the method and the measurement procedure. The results obtained with the three detectors have a good agreement with each other with a discrepancy less than 1.0%. The errors of the measured burnup values are within 6%. Comparison between the calculated and measured burnup values shows that the discrepancy of the C/E ratio is within 9% compared to unity. The results indicate that the method of measurements at subcritical conditions could be well applied to determine the relative burnup distribution of the DNRR.This paper presents the determination of the fuel burnup distribution of the Dalat nuclear research reactor （DNRR） using a method of measurements at subcritical conditions. The method is based on the assumption of linear dependence of the reactivity on the bumup of fuel bundles and the measurements at subcritical conditions. The measurements were taken for seven selected fuel bundles in two different measuring sequences. The measured burnup values have also been compared with the calculations for verifying the method and the measurement procedure. The results obtained with the three detectors have a good agreement with each other with a discrepancy less than 1.0%. The errors of the measured burnup values are within 6%. Comparison between the calculated and measured burnup values shows that the discrepancy of the C/E ratio is within 9% compared to unity. The results indicate that the method of measurements at subcritical conditions could be well applied to determine the relative burnup distribution of the DNRR.

关 键 词：研究反应堆 燃料 分发 测量过程 验证方法 方法论 价值 计算 

分 类 号：TL352[核科学技术—核技术及应用]