在高水平放射性废物仓库附近的环境压力下,对迁移的反应式运输建模
Won Woo Yoon1, Weon Shik Han1, Jeonghwan Hwang2
1Department of Earth System Sciences, Yonsei University, Seoul, Republic of Korea.
Journal of hazardous materials
|June 11, 2025
概括
土矿有效地限制了放射性废物存储库中的迁移,即使有衰变热和海水入侵. 它的自然特性保持了减少条件,这对制至关重要.
科学领域:
- 地质化学 地质化学
- 环境科学 环境科学
- 核工程 核工程是指核工程.
背景情况:
- 高水平放射性废物的处置需要强大的制障碍.
- 了解工程障碍中的放射性核素迁移对于仓库安全至关重要.
研究的目的:
- 在仓库条件下调查矿迁移在本托尼特-花岩系统中的情况.
- 评估衰变热和海水侵入对流动性的影响.
- 评估本托尼特作为防止释放的屏障的性能.
主要方法:
- 开发和验证一个合的COMSOL-IPhreeqc (COM-PHREE) 模型.
- 三种场景的模拟:标准,衰变热和海水侵入的衰变热.
- 环境演变的分析,包括物种化,吸附和矿物反应.
主要成果:
- 在标准场景中,的度仍然很低 (<1.10 × 10−7 mol/L),这是由于溶解度低和吸附度高.
- 衰变热通过改变物种化增加了在本托尼特中的溶解度和度 (<9.00 × 10−7 mol/L).
- 海水的入改变了氧化还原潜力,但本托尼特的酸盐缓冲限制了的增加 (<1.00 × 10−6 mol/L).
结论:
- 在各种仓库条件下,本托尼特证明了作为阻碍迁移的障碍物的有效性.
- 衰变热和海水的入侵可以影响的流动性,但本托尼特的特性可以减轻风险.
- COM-PHREE模型为模拟废物仓库中的放射性核素运输提供了一个有价值的工具.
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