论文部分内容阅读
为定量评价西安脉冲堆(XAPR)场外风险,建立XAPR核事故场外后果概率评价模型,以XAPR场区特征气象数据为输入数据,分析计算了XAPR核事故场外后果.结果表明:完整释放谱发生后,在XAPR场区100 m边界处有效剂量超过1、10 mSv的条件概率分别约为0.652％、0.0750％;个人有效剂量超过10 mSv的总频率小于2.20×10-9a-1;致死癌症风险超过1×10-6的总频率小于1.89×10-6 a-1;XAPR场外个人平均癌症死亡风险满足草拟的核安全目标.XAPR场外风险极小.“,”The emphasis of this paper lies in the quantitative estimation of off-site risk to the public from Xi\'an Pulsed Reactor (XAPR).Off-site consequence model for XAPR nuclear accident was established,and the meteorology data acquired from XAPR site was used as the input parameter with probabilistic theory.The off-site risk to the public of XAPR\'s radioactivity release was preliminarily analyzed in application of probabilistic safety assessment at 100m point of XAPR boundary in radioactivity.The results demonstrate that the conditional probabilities of effective dose exceeding 1 mSv and 10 mSv are about 0.652％ and 0.0750％ respectively in the case of radioactivity release spectrum.The overall frequencies with which individual effective dose 10mSv is exceeded is less than 2.20× 10-9 a-1,meanwhile the other overall frequency with which individual cancer fatality risk is exceeded is not greater than 1.89× 10-6 a-1.Accordingly the draft safety goal of XAPR in this research is met from this quantitative risk.Our initial assessment leads to conclude that the off-site risk to the public from XAPR is extremely low and then the high safety characteristic of XAPR is proved.