包气带-饱和带耦合模拟在核设施工艺设计中的应用研究

doi:10.27045/j.1000-8187.202603004

摘要/Abstract

摘要： 本文开展了不考虑和考虑包气带阻滞作用下的地下水环境影响评价,对比分析了两种条件下的模拟结果,并对不同包气带厚度和应急抢修时间进行了评价,分析其对评价结果的影响。不考虑包气带的评价利用解析法,考虑包气带的评价利用包气带-饱和带耦合模拟方法。评价结果显示:(1)考虑包气带时,放射性核素迁移至环境敏感点时,各核素年摄入(饮水)待积有效剂量累加值由不考虑包气带的0.471 mSv降为6.28×10^-5 mSv。(2)本次模拟条件下,应急抢修时间为15 d时,包气带厚度极限值为0.412 m,包气带厚度为0.5 m时,应急抢修时间极限值为20.18 d。可结合项目实际情况统筹协调管线布设及应急响应方案等。

关键词: 包气带, 耦合模拟, 放射性核素, 地下水, 工艺设计

Abstract: This paper carried out a groundwater environmental impact assessment without and with consideration of the attenuation of the vadose zone. The simulation results under the two conditions were compared and analyzed. At the same time, the evaluation of different vadose zone thicknesses and emergency repair duration were carried out to analyze their effects. The evaluation method of without considering the vadose zone is analytical method. The evaluation method of considering the vadose zone is the coupling simulation method for the vadose zone and saturated zone. The results show that:(1) Considering the hysteresis of vadose zone, annual committed effective dose from drinking for public decreased from 0.471 mSv to 6.28×10^-5 mSv, in which 0.471 mSv is the result of not considering the vadose zone.(2) Under the simulation conditions, when the emergency repair duration was 15 days, the thickness limit of the vadose zone is 0.412 m, and when the thickness of the vadose zone being 0.5 m, the limit of emergency repair duration is 20.18 days. Pipeline layout and emergency plan can be coordinated according to the actual situation of the project.

Key words: vadose zone, coupling simulation, radionuclide, groundwater, process design

中图分类号:

P641

张雪, 杨立建. 包气带-饱和带耦合模拟在核设施工艺设计中的应用研究[J]. 辐射防护, 2026, 46(3): 216-222.

ZHANG Xue, YANG Lijian. Research on the application of the coupled simulation of vadose and saturated zones in the process design of nuclear facilities[J]. RADIATION PROTECTION, 2026, 46(3): 216-222.

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