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。
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 84 DAC. 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.
出处
《辐射防护》
CAS
CSCD
北大核心
2015年第3期176-179,187,共5页
Radiation Protection
关键词
燃料棒
破损
碘危害
评估
防护
fuel rod
damage
radioiodine hazard
estimation
protection
