VVER机组大修期间燃料缺陷所致放射性碘的估算  

Estimation on Radioactive Iodine in Outage Caused by Fuel Defect for VVER Unit

作　　者：谢江山[1] 王志兵[1] 李中华[1] 丁长龙 易柏元 

机构地区：[1]江苏核电有限公司保健物理处,江苏连云港222042

出　　处：《核科学与工程》2017年第2期314-319,共6页Nuclear Science and Engineering

摘　　要：本文分析了VVER机组燃料气密性丧失缺陷在大修期间所致放射性碘的辐射影响,以某次存在燃料缺陷大修为例估算了一回路碘净化时间、大修相关作业期间反应堆厂房碘浓度水平和反应堆厂房碘去除时间,通过与设计文件、实际值对比表明,该估算是合理的,可以有效指导该类型机组大修期间的燃料缺陷的辐射风险控制。This article mainly analyzes the radiation risk of radioactive iodine caused by the fuel defect （gas tightness） during refueling outage of VVER unit, and calculates the purification time of iodine in the primary circuit, the iodine concentration in the reactor building and duration of removing the iodine from the reactor building during the refueling outage. It is proved that the estimation is reasonable through comparison with the design documents and actual values, and can effectively direct the radiation risk control of fuel defects during refueling outage.

关 键 词：VVER机组 燃料缺陷 大修 放射性碘 碘峰 估算 

分 类 号：R147[医药卫生—公共卫生与预防医学] TL75[核科学技术—辐射防护及环境保护]