title: Comparison of RIMPUFF, HYSPLIT, ADMS atmospheric dispersion model outputs, using emergency response procedures, with (85)Kr measurements made in the vicinity of nuclear reprocessing plant.
abstract: 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.
authors.affiliation: Institut de Radioprotection et de Sureté Nucléaire (IRSN, PRP-ENV/SERIS), Laboratoire de Radioécologie, Rue Max Pol Fouchet, Cherbourg-Octeville 50130, France. olivier.connan@irsn.fr
authors.forename: Olivier
authors.initials: O
authors.lastname: Connan
authors.forename: Kilian
authors.initials: K
authors.lastname: Smith
authors.forename: Catherine
authors.initials: C
authors.lastname: Organo
authors.forename: Luc
authors.initials: L
authors.lastname: Solier
authors.forename: Denis
authors.initials: D
authors.lastname: Maro
authors.forename: Didier
authors.initials: D
authors.lastname: Hébert
mesh_terms: D000392:Air Movements; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D004189:Disaster Planning; D005602:France; D007727:Krypton Radioisotopes / Q000032:analysis*; D008962:Models, Theoretical; D011834:Radiation Monitoring; D011850:Radioactive Waste
chemical_list: D000396:Air Pollutants, Radioactive; D007727:Krypton Radioisotopes; D011850:Radioactive Waste
keywords: (85)Kr; ADMS; Experimental measurement; HYSPLIT; RIMPUFF