基于无源伽马扫描检测方法的MOX燃料棒芯块PuO_(2)含量检测技术研究  

Research on PuO_(2)Content Detection Technology of MOX Fuel Rod Pellets based on Passive Gamma Scanning Detection Method

作　　者：袁平 李铁成 张雷 何永堂 马金波 YUAN Ping;LI Tiecheng;ZHANG Lei;HE Yongtang;MA Jinbo(China Nuclear Power Engineering Co Ltd Zhengzhou Branch,Zhengzhou,450052,China)

机构地区：[1]中国核电工程有限公司郑州分公司,郑州450052

出　　处：《核电子学与探测技术》2025年第1期31-36,共6页Nuclear Electronics & Detection Technology

摘　　要：本文采用基于蒙特卡罗方法的MCNP-4C程序对NaI(Tl)探测器探测CEFR-MOX芯块的能谱曲线进行了模拟,选取了284~464 keV的能谱峰计数率用来测量CEFR-MOX芯块中的PuO_(2)含量。建立了使用NaI(Tl)探测器测量MOX燃料棒芯块PuO_(2)含量的理论检测模型,根据MCNP-4C程序的计算结果证明了NaI(Tl)探测器对PuO_(2)平均含量芯块的检测精度小于1%,对PuO_(2)含量异常芯块的检测精度小于2%。该计算结果与实验结果一致。This article uses the MCNP-4C program based on the Monte Carlo method to simulate the energy spectrum curve of the Nal(Tl)detector detecting the CEFR-MOX pellets.The energy spectrum peak count rate of 284~464 keV is selected to measure the PuO_(2)content in CEFR-MOX pellets.A theoretical detection model for measuring the PuO_(2)content of MOX fuel rod pellets using a Nal(Tl)detector was established.The calculation results based on the MCNP-4C program proved that the detection capability of the Nal(Tl)detector for the average PuO_(2)content pellets is greater than 1%,and for the abnormal PuO_(2)content is better than 2%.The calculated results are consistent with the experimental results.

关 键 词：蒙特卡罗 NAI(TL)探测器 CEFR-MOX芯块 PuO_(2)含量 

分 类 号：TL812.1[核科学技术—核技术及应用]