Indirect neutron radiography experiment on dummy nuclear fuel rods for pressurized water reactors at CMRR  

作　　者：Yong Sun Qi-Biao Wang Peng-Cheng Li Ming Xia Bin Liu He-Yong Huo Wei Yin Yang Wu Sheng Wang Chao Cao Xin Yang Run-Dong Li Hang Li Bin Tang 

机构地区：[1]Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621000,China [2]School of Physics and Electronic Engineering,Sichan University of Science and Engineering,Zigong 643000,China

出　　处：《Nuclear Science and Techniques》2024年第11期13-27,共15页核技术（英文）

基　　金：supported in part by the National Key R&D Program of China (No. 2022YFA1604002);the Sichuan Postdoctoral Research Program (No. TB2022035);the Nuclear Energy Development Research Program of China;the Scientific Research and Innovation Team Program of Sichuan University of Science and Engineering (No. SUSE652A001)

摘　　要：Nuclear energy is a vital source of clean energy that will continue to play an essential role in global energy production for future generations.Nuclear fuel rods are core components of nuclear power plants,and their safe utilization is paramount.Due to its inherent high radioactivity,indirect neutron radiography(INR)is currently the only viable technology for irradiated nuclear fuel rods in the field of energy production.This study explores the experimental technique of indirect neutron computed tomography(INCT)for radioactive samples.This project includes the development of indium and dysprosium conversion screens of different thicknesses and conducts resolution tests to assess their performance.Moreover,pressurized water reactor(PWR)dummy nuclear fuel rods have been fabricated by self-developing substitute materials for cores and outsourcing of mechanical processing.Experimental research on the INR is performed using the developed dummy nuclear fuel rods.The sparse reconstruction technique is used to reconstruct the INR results of 120 pairs of dummy nuclear fuel rods at different angles,achieving a resolution of 0.8 mm for defect detection using INCT.

关 键 词：Conversion screen DYSPROSIUM Indirect neutron computed tomography Dummy nuclear fuel rods 

分 类 号：TM623.91[电气工程—电力系统及自动化] TL352[核科学技术—核技术及应用]