Erhardt Lorne, Lebel Luke, Korpach Ed, Berg Rodney, Inrig Elizabeth, Watson Ian, Liu Chuanlei, Gilhuly Colleen, Quayle Debora
*Defence Research and Development Canada, Ottawa Research Centre, Ottawa, ON, Canada; †Canadian Nuclear Laboratories, Chalk River, ON, Canada; ‡Health Canada, Radiation Protection Bureau, Ottawa, ON, Canada; §Calian Technologies Limited, Ottawa, ON, Canada.
Health Phys. 2016 May;110(5):442-57. doi: 10.1097/HP.0000000000000444.
In 2012, Defence Research and Development Canada led a series of experiments, titled the Full-Scale Radiological Dispersal Device Field Trials, in which short-lived radioactive material was explosively dispersed and the resulting plume and deposition were characterized through a variety of methods. Presented here are the results of a number of measurements that were taken to characterize the radioactive ground deposition. These included in situ gamma measurements, deposition filter samples, and witness plate measurements that were taken in situ with handheld beta survey meters. The results from the different measurement techniques are compared to each other and to a simple deposition model. Results showed that approximately 3% of the original source activity was deposited in the immediate vicinity of ground zero, and an additional 15-30% of the original activity was deposited within 450 m of ground zero. Implications of these results for emergency response are discussed.
2012年，加拿大国防研究与发展局开展了一系列名为“全尺寸放射性散布装置现场试验”的实验，其中将短寿命放射性物质进行爆炸分散，并通过多种方法对产生的烟羽和沉降物进行表征。本文展示的是为表征放射性地面沉降所进行的一系列测量结果。这些测量包括现场伽马测量、沉降过滤样本以及使用手持式贝塔测量仪进行的现场见证板测量。将不同测量技术的结果相互比较，并与一个简单的沉降模型进行比较。结果表明，约3%的原始源活度沉降在爆心投影点附近区域，另有15% - 30%的原始活度沉降在距爆心投影点450米范围内。文中还讨论了这些结果对应急响应的影响。
