西澳大利亚矿业运营中辐射剂量和相关参数的审查 (2020-23)
Martin I Ralph1, Jubin Koshy1, Paul Foley1
1WorkSafe: Mines Safety, Department of Energy, Mines, Industry Regulation and Safety, 1 Adelaide Terrace, East Perth, Western Australia 6004, Australia.
概括
西澳大利亚的矿山面临着自然存在的放射性物质 (NORMs) 的辐射暴露风险的增加,这是由于关键的矿产开采. 新的法规对工人的剂量进行了跟踪,吸入放射性尘埃是主要的暴露途径.
科学领域:
- 职业健康和安全问题 职业健康和安全问题
- 辐射保护 辐射保护
- 环境科学 环境科学
背景情况:
- 西澳大利亚 (WA) 矿业是全球重要的重要矿物质供应商,如和稀土.
- 相关的石学含有自然存在的放射性物质 (NORMs),增加了工人的辐射暴露.
- 新的"2022年职业健康和安全 (矿山) 条例"规定,对于矿山的辐射保护,潜在的工人剂量超过1mSv/年.
研究的目的:
- 提供关于华盛顿州矿山辐射保护的新立法框架的概述.
- 通过三年职业有效剂量 (ED) 数据 (2020-21至2022-23) 更新之前的发现.
- 分析暴露途径并确定辐射监测需要改进的领域.
主要方法:
- 对相关矿山 (RMs) 向WorkSafe WA.提交的职业ED年度报告的分析.
- 在三个报告期内追踪RM和报告的工人ED的数量.
- 识别和量化不同暴露途径 (吸入灰尘,) 的意义.
主要成果:
- RM的数量从2020-21年增加到2022-23年.
- 年平均ED为1.0mSv,最多在2022-23年达到4.9mSv.
- 吸入放射性尘埃是主要的暴露途径,其次是吸入.
结论:
- 向新监管框架的过渡得到了行业指导的支持.
- 每名工人抽样的下降趋势需要补救,以确保数据可靠性.
- 持续监测和遵守法规对于管理WA矿山中NORM相关的辐射风险至关重要.
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