基于自然放射性测量的河流底部的现场马放射测量
H Kasban1, Elsayed H Ali1, H Arafa1
1Engineering Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Egypt.
概括
这项研究引入了一种新系统,用于在河床中快速地绘制自然存在的放射性物质 (NORM). 该系统有效地测量NORM度,揭示环境变化,特别是在海界面附近.
科学领域:
- 环境科学 环境科学
- 地质科学是地球科学.
- 核科学 核科学 核科学
背景情况:
- 在水生环境中绘制自然存在的放射性物质 (NORM) 呈现出重大技术,后勤和环境挑战.
- 传统的NORM分析涉及耗时的收集样品的实验室测试,阻碍了大规模评估.
- 准确的NORM映射对于环境保护,公共卫生,工业安全和监管合规性至关重要.
研究的目的:
- 开发和演示一个高效的系统,快速地在河床上绘制NORM的地图.
- 为了克服水下环境中传统的基于样本的NORM分析的局限性.
- 为环境监测和风险评估提供实时数据.
主要方法:
- 使用防水 (NaI(Tl)) 闪光探测器,与用于水下部署的机械系统集成.
- 采用数据采集系统 (DAS) 和全球定位系统 (GPS) 进行实时数据收集和精确位置跟踪.
- 开发了系统软件,用于立即可视化和分析玛计数率.
主要成果:
- 在埃及尼罗河的罗塞塔分支中成功测试了该系统.
- 证明了系统在绘制不同船速 (2公里/小时和6公里/小时) 的不同NORM度的效率.
- 在地中海方面观察到NORM水平的增加,表明河海界面的土壤组成发生了变化.
结论:
- 开发的系统为河床的现场NORM绘图提供了高效和有效的解决方案.
- 实时数据采集和分析使NORM分布的快速环境评估成为可能.
- 最佳的扫描速度取决于源活动,探测器灵敏度和映射目标.
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