摘要
探索了将概率安全评价(PSA)方法系统地应用于放射性物品运输的辐射风险评价,分析了高温气冷堆核电站示范工程(HTR-PM)新燃料元件公路运输的辐射风险。基于实际路况数据和可能的事故情景,选择货包辐射水平升高和临界两种事故工况进行了事故频率分析。分析表明:货包辐射水平升高事故的发生频率为4.21×10^(-7)(车·单次运输)-1;临界事故的发生频率低于1×10^(-13)(车·单次运输)-1,可不考虑其辐射后果。对事故后果估算的结果表明:货包辐射水平升高事故对应急人员造成的最大外照射剂量为0.55mSv,对附近公众造成的最大外照射剂量为4.55×10^(-3) mSv,其辐射影响是可接受的。总体辐射风险为1.24×10^(-10)人·Sv/(车·单次运输),其中撞击事故对风险的贡献最大。
The systemic application of probabilistic safety assessment （PSA ） method to radiation risk assessment of radioactive material transportation was explored ,and then the radiation risk of road transportation of new fuel elements of HTR‐PM was analyzed . Based on actual route data and potential accident scenarios ,both accident conditions of package radiation level hoist and criticality were chosen for accident frequency analysis . The results show that the frequency of package radiation level hoist accident is 4.21 x10-7 （vehicle ·each transportation ）-1 , w hile the consequence of criticality accident could not be considered because its frequency is less than 1 x 10-13 （vehicle ·each trans‐portation）-1 .T he results of accident consequence show that in the package radiation level hoist accident ,the maximum external exposure dose arising from the accident for emergency worker is 0.55 mSv ,and 4.55x 10 -3 mSv for public people around ,which are acceptable .The global radiation risk is 1.24 x 10 -10 person · Sv/（vehicle · each transportation） ,for w hich impact accident contributes the maximum percent .
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2016年第12期2299-2304,共6页
Atomic Energy Science and Technology
基金
国家科技重大专项基金资助项目(2011ZX06903-009)
关键词
概率安全评价
燃料
公路运输
辐射风险
HTR-PM
probabilistic safety assessment
HTR-PM
fuel
road transportation
radia-tion risk
