使用大气后代作为核爆炸放射性核素的气溶类型的静电沉器收集效率研究
Michael E Moore1, Martin E Keillor1, Dustin M Kasparek1
1Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA.
Journal of environmental radioactivity
|October 11, 2023
概括
静电沉 (ESP) 提供了一个低功耗的解决方案,用于在核爆炸监测 (NEM) 中检测空气中的放射性核素 (RNs). 这种无过方法提高了空气采样效率,证明了远程监测站的可行性.
科学领域:
- 核科学与工程 核科学与工程
- 环境监测 环境监测
- 气溶科学 气溶科学
背景情况:
- 国际监测系统中的传统气溶采样器依赖过器,限制体积流量容量和功率效率.
- 静电沉 (ESP) 为气溶收集提供了一个无过的替代方案,可能会提高功率效率和空气吞吐量.
- 低功率ESP系统正在探索移动和固定放射性核素 (RN) 检测,这对于核爆炸监测 (NEM) 至关重要.
研究的目的:
- 为了评估大气放射性核素 (RNs) 的紧的静电沉 (ESP) 设计的收集效率.
- 调查操作参数对ESP对核爆炸监测 (NEM) 性能的影响.
主要方法:
- 同时采集自然发生的子后代,使用电线板ESP和基于过器的采样器.
- 测量采集的样本活动通过马光谱与衰变校正.
- 在一系列ESP操作参数和流速中推导RN收集效率.
主要成果:
- 优化的ESP收集效率在1.5-2CMM (每分钟立方米) 时达到21±2%.
- 在0.5CMM左右的较低流量,产生了55±5%的显著更高的收集效率.
- 对核爆炸监测的ESP性能进行评估,表明在数百公里远的地方检测裂变和激活产品的可行性.
结论:
- 低功耗,无镜的静电沉 (ESP) 系统是核爆炸监测 (NEM) 中放射性核素检测的可行技术.
- 与传统的基于波器的方法相比,ESP提供了更好的功率效率和空气采样能力.
- 开发的ESP收集器证明了在扩展范围有效监测核事件的潜力.
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