评估放射性废物的固化使用高炉渣作为固化剂的评估
Ji-Hun Jeon1, Jong-Hwan Lee1, Woo-Chun Lee1,2
1Department of Geology and Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), Jinju 52828, Republic of Korea.
Materials (Basel, Switzerland)
|October 14, 2023
概括
地面颗粒高炉渣 (BFS) 有效地固化放射性混凝土废物 (CW),降低了处置成本. 这种可持续的方法利用工业副产品来安全地处理核废物.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 核工程 核工程是指核工程.
背景情况:
- 核电设施退役会产生大量的混凝土废物 (CW),其中包括60-80%的放射性废物.
- 在废弃项目中,废弃CW是相当大的成本和技术挑战.
- 全球迫切需要有效的技术来减少和回收CW.
研究的目的:
- 为了评估地面颗粒高炉渣 (BFS) 作为放射性废物的固化剂.
- 评估固化废物的性能,包括CW (CACW),废土 (WS) 和金属废物 (MW) 的粗聚合物.
- 确定基于BFS的固化剂是否适用于安全处理放射性废物.
主要方法:
- 对于CaO含量和水化前体的磨砂颗粒BFS的表征.
- 优化水与结合剂的比率,并确定有效的激活剂 (Ca (OH) 2和CaSO4).
- 在BFS矩阵中确定各种废物类型的最大包装容量.
- 在含有Co,Cs和Sr的固化废物上进行漏试验,以评估漏性.
主要成果:
- 土质颗粒BFS含有36.8%的CaO,激活酸水合物 (CSH) 作为水化前体.
- 最佳的水与粘合剂比为0.25,其中Ca (OH) 2和CaSO4增强了压力强度.
- 实现的最大包装容量为WS的9重%和MW的13重%在50重%CW时.
- 对Co,Cs和Sr的透性指数达到处置的可接受水平.
结论:
- 使用地面颗粒BFS (SABFS) 固化废物证明了有效地固定放射性污染物.
- SABFS显示出作为放射性废物传统水泥剂的可持续和经济有效替代品的潜力.
- 这项技术为处理核废弃物的混凝土废物提供了可行的解决方案.
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