强激光与粒子束2026，Vol.38Issue(11)：159-164,6.DOI:10.11884/HPLPB202638.250173
压水堆运行中微小燃料棒破口的预测诊断研究
Study on prediction and evaluation method of micro fuel rod failures during PWR operation
袁潇 1付鹏涛 2丁兆建 1张松1
作者信息
- 1. 广西防城港核电有限公司,广西 防城港 538001
- 2. 中广核研究院有限公司,广东 深圳 518000
- 折叠
摘要
Abstract
[Background]During the operation of a nuclear power plant,fuel rod failure will lead to an increase in the radioactive activity in the primary coolant,increases the difficulty of storing,transporting and disposing of spent fuel.If the fuel failure has deteriorated to some degree,the reactor should be shut down within several hours to limit the release of fission products to the environment.[Purpose]Therefore,it is necessary to assess the status of fuel failure for the utilities as soon as possible.[Methods]In the paper,the generation and migration mechanism of fission products in the primary loops in pressurized water reactors has been introduced,and then one analytical method for diagnosing the status of fuel failure based on the measured fission product volume activity has been established.The characteristics of iodine and noble gas release from fure rod with tiny defects has been identified through one typical fuel failure case.The evolution of fuel defect size can also be determined by the regression of release-to-birth(R/B)and the decay constant(λ)of fission products.[Results]The model diagnosis results have been confirmed by the sipping examination.The analysis of a typical failure case successfully reveals the characteristic release behavior of iodine and noble gases from small defects.[Conclusions]The proposed analytical method can help quickly identify and locate failed fuel assemblies,thereby reducing the impact of fuel failure treatment in the reactor overhaul period.This approach provides with a practical tool for timely assessment of fuel failure status and informed decision-making regarding reactor operation.关键词
压水堆/微破口/释放产生比/裂变产物释放Key words
pressurized water reactor/tiny fuel failures/release to birth/release of fission products分类
能源科技引用本文复制引用
袁潇,付鹏涛,丁兆建,张松..压水堆运行中微小燃料棒破口的预测诊断研究[J].强激光与粒子束,2026,38(11):159-164,6.
