在越南,评估含有飞的未燃烧建筑材料潜在的辐射危害
Ha Ky Phuong Huynh1,2, Loan Thi Hong Truong3,4,5, Phong Thanh Mai1,2
1Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam.
Environmental geochemistry and health
|October 20, 2023
概括
这项研究测量了越南飞灰中的放射性,发现剂量低于全球平均水平. 然而,在通风不良的空间中的暴露可能会随着时间的推移超过自然辐射极限.
科学领域:
- 环境科学 环境科学
- 核化学 核化学 核化学
- 辐射保护 辐射保护
背景情况:
- 燃煤发电厂产生飞灰和底灰,这些副产品通常用于建筑材料.
- 在未燃烧的中使用这些灰材料引发了人们对自然存在的放射性材料 (NORM) 潜在的辐射危害的担忧.
- 评估建筑材料的放射性和相关的健康风险对于公共安全至关重要.
研究的目的:
- 量化来自越南的飞灰和底灰制成的未烧中的226Ra,232Th和40K的活性度.
- 为了分析这些样中的222Rn度,子质量呼气速率和散发分数.
- 评估用这些材料建造的模型房间中居住者潜在的放射性健康风险.
主要方法:
- 使用高纯度 (HPGe) 探测器的低水平马射线光谱测量用于测量放射性核酸活性.
- 使用RAD7子监测器分析了222Rn度.
- 使用ResRad-Build代码计算年度有效剂量并评估辐射危险.
主要成果:
- 226Ra,232Th和40K的平均特异性活动分别为67.7,79.3和703.5 Bq kg-1.
- 总年有效剂量计算为0.9 mSv y-1,低于全球平均值2.4 mSv y-1.
- 拉登暴露占30年总剂量的很大一部分 (62.3%至98.8%),在低通风条件下有可能超过自然辐射极限.
结论:
- 来自越南的含有飞灰和底灰的未燃,放射性水平通常低于国际安全基准.
- 这些材料释放的气是整体辐射剂量的主要贡献者.
- 长期居住在用这些建造的通风不良的空间中可能会导致辐射剂量超过自然背景水平,因此需要仔细考虑建筑通风标准.
关键词:
每年的有效剂量.发出分数的发出分数玛玛是什么意思 玛玛是什么意思自然放射性的自然放射性.拉顿是什么意思 拉顿是什么意思在 ResRad 构建中,ResRad 构建了ResRad.没有燃烧的建筑材料.更多相关视频
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