辐射防护 ›› 2015, Vol. 35 ›› Issue (3): 176-179.

• 经验交流 • 上一篇    下一篇

VVER机组燃料破损导致放射性碘危害的评估与防护探讨

李中华, 谢江山, 孙开斌, 王志兵   

  1. 中核集团江苏核电有限公司,江苏 连云港 222042
  • 收稿日期:2014-08-26 出版日期:2015-05-20 发布日期:2024-10-21
  • 作者简介:李中华(1977—),男,2000年毕业于南京大学核物理及核技术专业,高级工程师。E-mail:lizh@jnpc.com.cn

Discussion of radioactive iodine hazard estimation and protection caused by fuel defect for VVER unit

Li Zhonghua, Xie Jiangshan, Sun Kaibing, Wang Zhibing   

  1. Jiangsu Nuclear Power Corporation, Lianyungang of Jiangsu Province,Jiangsu Lianyungang 222042
  • Received:2014-08-26 Online:2015-05-20 Published:2024-10-21

摘要: 压水堆核电厂运行过程中可能发生燃料棒破损。燃料棒一旦破损,所包容的高水平放射性碘等裂变气体将释放至一回路,并可能进一步释放到厂房导致较高的空气污染,增加工作人员受到内照射的风险。对VVER机组燃料棒破损可能导致的碘危害进行了估算和分析,结果表明:即使1根燃料棒破损也可导致大修期间堆厂房放射性碘空气污染水平高达84DAC(derived air concentration)。结合电厂实践从一回路净化除碘、控制碘向厂房空气释放和扩散、空气净化和个人防护等方面探讨了放射性碘危害的控制和防护措施,并提出了后续应对类似情况的建议。

关键词: 燃料棒, 破损, 碘危害, 评估, 防护

Abstract: There is probability of fuel rods damage in PWR during operation. If the fuel rods damaged, the fission gases such as radioiodine will be released to the air of building, increasing the risk of internal exposure to personnel. According to the estimation of iodine hazard due to fuel rods damage for VVER unit, one damaged fuel rod can lead to air contamination of radioiodine as high as 84DAC. With reference to the practical NPP, radioiodine hazard control and protection measures such as the primary circuit purification, control of iodine releasing and diffusing to the air, air purification and personal protection are discussed, and some suggestions for similar situations are proposed.

Key words: fuel rod, damage, radioiodine hazard, estimation, protection

中图分类号: 

  • R144