Institut de Radioprotection et de Sureté Nucléaire (IRSN, PRP-ENV/SERIS), Laboratoire de Radioécologie, Rue Max Pol Fouchet, Cherbourg-Octeville 50130, France.
J Environ Radioact. 2013 Oct;124:266-77. doi: 10.1016/j.jenvrad.2013.06.004. Epub 2013 Jul 11.
The Institut de Radioprotection et de Sureté Nucléaire (IRSN) performed a series of (85)Kr air sampling campaigns at mesoscale distances (18-50 km) from the AREVA NC La Hague nuclear reprocessing plant (North West France) between 2007 and 2009. The samples were collected in order to test and optimise a technique to measure low krypton-85 ((85)Kr) air concentrations and to investigate the performance of three atmospheric dispersion models (RIMPUFF, HYSPLIT, and ADMS), This paper presents the (85)Kr air concentrations measured at three sampling locations which varied from 2 to 8000 Bq m(-3), along with the (85)Kr air concentrations output by the dispersion models. The dispersion models made reasonable estimates of the mean concentrations of (85)Kr field measurements during steady wind conditions. In contrast, the models failed to accurately predict peaks in (85)Kr air concentration during periods of rapid and large changes in wind speed and/or wind direction. At distances where we made the comparisons (18-50 km), in all cases, the models underestimated the air concentration activities.
法国阿海珐集团（AREVA NC）位于法国西北部的拉阿格核燃料后处理厂（La Hague）在 2007 年至 2009 年期间进行了一系列中尺度距离（18-50 公里）的（85）Kr 空气取样活动。这些样品是为了测试和优化一种测量低浓度（85）Kr 的技术而采集的，同时还研究了三种大气扩散模型（RIMPUFF、HYSPLIT 和 ADMS）的性能。本文介绍了在三个采样点测量的（85）Kr 空气浓度，这些采样点的（85）Kr 空气浓度范围从 2 到 8000 Bq m(-3)，同时还介绍了扩散模型输出的（85）Kr 空气浓度。在稳定风向条件下，扩散模型对（85）Kr 现场测量的平均浓度进行了合理的估算。相比之下，在风速和/或风向快速、大幅变化期间，模型无法准确预测（85）Kr 空气浓度的峰值。在我们进行比较的距离（18-50 公里）内，在所有情况下，模型都低估了空气浓度。
