强激光与粒子束2024，Vol.36Issue(3)：158-165,8.DOI:10.11884/HPLPB202436.230387
压水堆核电厂燃料棒破损诊断分析研究
Research on diagnosis of fuel defects in operating pressurized water reactors
摘要
Abstract
Fuel cladding is the first barrier to confine the radionuclides produced in the reactor core.Once the fuel rods defect,fission product activity in the primary loops will increase and may lead to temporary shutdown of the reactor when fuel rod failure has deteriorated to certain levels.This paper introduces the theoretical mechanism of production and migration of fission product from defective fuel rods to the primary loops in the operating pressurized water reactors.The analytical solution of fission product concentration in primary loops is got based on the first-order differential equations for steady operation.Based on the release-to-birth ratios for recoil and diffusion by least squares method,a method is developed to diagnose the status of fuel failure in pressurized water reactors,including fuel failure time,the degrees of defect size,the disseminated actinides,the average burnup and the fuel batch.The prediction results of fuel failure are verified well with that of a typical fuel failure with secondary degradation in one commercial pressurized water reactor,as well as those of the sipping test and the post irradiation examination.关键词
燃料破损/裂变产物/释放产生比/二次氢化Key words
fuel failure/fission product/release-to-birth/secondary hydriding分类
能源科技引用本文复制引用
付鹏涛,章安龙,辜培勇..压水堆核电厂燃料棒破损诊断分析研究[J].强激光与粒子束,2024,36(3):158-165,8.基金项目
中国广核集团燃料战略专项(3100121513) （3100121513）
中广核研究院有限公司青峰计划 （）
