深层地质处置中的工程障碍:对放射性核素迁移和长期安全的影响
Nan Li1, Xianzhe Duan2, Guowen Peng3
1School of Resource & Environment and Safety Engineering, University of South China, Hengyang, 421001, China; School of Chemistry& Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China.
Journal of environmental radioactivity
|March 19, 2025
概括
高水平放射性废物 (HLWs) 的安全处置对核能至关重要. 这项研究优化了工程障碍,比如改造的土石,以提高深层地质仓库中的放射性核素含量,提高长期安全性.
科学领域:
- 核工程和废物管理 核工程和废物管理
- 材料科学用于放射性废物隔离和隔离.
背景情况:
- 核电的全球扩张产生了大量的高水平放射性废物 (HLW),由于放射性和长半衰期,这给处置带来了挑战.
- 使用多障碍系统进行深层地质处理是长期隔离HLW的首选方法.
- 工程障碍对于防止放射性泄漏和确保仓库安全至关重要.
研究的目的:
- 调查优化工程障碍的高水平放射性废物 (HLW) 处置.
- 评估屏障材料和水化学条件对放射性核素迁移的影响.
- 为地质处置设施的设计和材料选择提供见解.
主要方法:
- 审查国际实践和HLW处置的技术进步.
- 专注于本托尼特作为缓冲材料,包括用于增强吸附的改性形式.
- 在不同的水化学条件下 (水合,离子度,pH) 检查放射性核化物 (如,) 的迁移机制.
- 评估废弃物容器的水泥和金属材料,评估耐腐蚀性.
主要成果:
- 改性顿石显示了对和等放射性核素的增强吸附,提高了安全性和稳定性.
- 水化学条件显著影响本托尼特的吸附能力和核化物迁移率.
- 处理容器材料显示出有希望的耐腐蚀性,尽管长期耐用性需要进一步研究.
结论:
- 优化工程障碍,特别是先进的土岩和耐用容器,对于高沉积水的有效地质处置至关重要.
- 为了准确的安全评估,了解在特定的水化条件下核迁移至关重要.
- 这些发现为设计和管理HLW处置设施提供了宝贵的理论和实践指导,特别是在中国.
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