摘要
介绍了AP1000核电机组废水系统流出物收集箱在发生假想破裂事故后,泄漏的核素在地下水和地表水中的浓度分布的计算方法。对事故泄露的核素进行筛选,计算核素在地下水中的浓度分布,以及通过地下水进入地表水后在受纳水体中的浓度分布,并与正常运行工况下放射性液态流出物排放所致地表水中核素浓度进行了比较。结果表明,只有不被吸附且有较长半衰期的核素才可能进入地表水,而被基岩吸附的核素迁移速度都很慢,直至核素衰变殆尽,也不会迁移到核电厂厂区外。事故泄漏的核素不会使受纳水域中核素浓度有明显的增加。
A calculation method for the concentration distributions of radioactivity in groundwater and surface water due to a postulated WLS effluent holdup tank failure accident for One NPP under construction is introduced. After screening, the concentration distributions of radionuclides that migrated in groundwater and flowed into surface water in accident were calculated. The concentration of nuclides leaked out in accident is compared with that of normal liquid discharge in surface water. Results shows that only the radionuclide which would not be adsorbed and with long half-time might enter the surface water, but the radionuclide which would be adsorbed by bedrock will not migrated beyond the area of NPP until the radionuclide is decayed because of the slow migration rate. The increased radioactive concentrations caused by the accident discharge will not exceed distinctly the concentration resulting from normal liquid discharge.
出处
《辐射防护》
CAS
CSCD
北大核心
2013年第4期235-242,共8页
Radiation Protection
