Rishel Jeremy P, Keillor Martin E, Arrigo Leah M, Baciak James E, Detwiler Rebecca S, Kernan Warnick J, Kirkham Randy R, Milbrath Brian D, Seifert Allen, Seifert Carolyn E, Smart John E
*Pacific Northwest National Laboratory, P.O. Box 999, MSIN: J4-65, Richland, WA 99352; †University of Florida, Materials Science and Engineering, P.O. Box 116400, Gainesville, FL 32611.
Health Phys. 2016 May;110(5):526-32. doi: 10.1097/HP.0000000000000475.
Atmospheric dispersion theory can be used to predict ground deposition of particulates downwind of a radionuclide release. This paper uses standard formulations found in Gaussian plume models to inform the design of an experimental release of short-lived radioactive particles into the atmosphere. Specifically, a source depletion algorithm is used to determine the optimum particle size and release height that maximizes the near-field deposition while minimizing both the required source activity and the fraction of activity lost to long-distance transport. The purpose of the release is to provide a realistic deposition pattern that might be observed downwind of a small-scale vent from an underground nuclear explosion. The deposition field will be used, in part, to study several techniques of gamma radiation survey and spectrometry that could be used by an On-Site Inspection team investigating such an event.
大气扩散理论可用于预测放射性核素释放源下风方向颗粒物的地面沉降。本文利用高斯烟羽模型中的标准公式，为向大气中实验性释放短寿命放射性粒子的设计提供参考。具体而言，使用一种源耗尽算法来确定最佳粒径和释放高度，以使近场沉降最大化，同时将所需源活度以及损失于长距离传输的活度比例降至最低。此次释放的目的是提供一个可能在地下核爆炸小规模通风口下风方向观测到的实际沉降模式。该沉降场将部分用于研究一些伽马辐射测量和能谱测定技术，现场检查小组在调查此类事件时可能会用到这些技术。
