在激光切割中对二次排放行为分析和气溶特性评估,以确保核废弃的安全性
Joonsoo Ock1, Jae Sung Shin2, Gwon Lim3
1Department of Nuclear Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
Journal of hazardous materials
|November 1, 2024
概括
使用高功率激光器切割厚厚的不钢板块会产生大量的二次排放,主要是渣和渣. 优化切割速度有效地减少了气溶的产生,这对于减轻核退役中的环境和健康风险至关重要.
科学领域:
- 材料科学与工程 材料科学与工程
- 环境科学 环境科学
- 职业健康和安全问题 职业健康和安全问题
背景情况:
- 厚奥氏体304L不钢的激光切割用于核废弃物.
- 了解二次排放和气溶特性对于环境和健康影响评估至关重要.
研究的目的:
- 在激光切割过程中量化和描述二次排放 (耗尽的气溶,沉积的渣,墙体沉积物,附着的渣).
- 研究切割参数 (厚度,速度,激光功率) 对排放类型和气溶特性的影响.
- 为设计有效的过和通风系统提供数据.
主要方法:
- 使用高功率光纤激光器切割10-30毫米厚的奥氏体304L不钢板时产生的二次排放的分析.
- 排放量按类型的确定 (废气溶,沉积渣,墙体沉积物,附着渣).
- 测量气溶计数中介气动直径和度.
- 气溶的化学成分分析.
主要成果:
- 二次排放主要由附着的渣渣和沉渣 (>98%).
- 耗尽的气溶占总排放量的不到0.1%.
- 总二次排放量随板块厚度的增加而增加.
- 随着切割速度的增加,气溶的度降低了约30%.
- 在以3千瓦激光功率切割的30毫米厚板上,气溶的气动直径中位数约为0.12微米.
结论:
- 优化切割速度是一种有效的策略,可以在激光切割厚型不钢时最大限度地减少气溶的产生.
- 描述排放成分有助于评估气溶的反应性,毒性和环境影响.
- 这些发现支持开发用于核废弃的改进的安全协议和排放控制技术.
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