title: Measurement and modelling of radioxenon plumes in the Ottawa Valley.
abstract: Since 2001 a real-time radiation monitoring network of Canadian nuclear facilities and major population centres has been implemented for response to nuclear incidents including a possible terrorist attack. Unshielded NaI(Tl) spectroscopic detectors are employed to measure gamma radiation from airborne radioactivity and radioactivity deposited on the ground. These detectors are composed of a standard 3''x3'' cylindrical NaI(Tl) spectrometers with data storage and integrated telemetry. Some of the detectors have been deployed in the Ottawa Valley near Chalk River Laboratories and Ottawa, which has a complex radioxenon environment due to the proximity of nuclear power reactors, and medical isotope facilities. Although not a health threat, these releases have provided an opportunity for the Canadian Meteorological Centre and the Commissariat à l'Energie Atomique to validate their meteorological models. The meteorological models of the two organizations are in good agreement on the origin and the source terms of these releases.
authors.affiliation: Radiation Protection Bureau, 775 Brookfield Road, A.L. 6302D1, Ottawa, ON, Canada K1A 1C1. trevor_stocki@hc-sc.gc.ca
authors.forename: T J
authors.initials: TJ
authors.lastname: Stocki
authors.forename: P
authors.initials: P
authors.lastname: Armand
authors.forename: Ph
authors.initials: P
authors.lastname: Heinrich
authors.forename: R K
authors.initials: RK
authors.lastname: Ungar
authors.forename: R
authors.initials: R
authors.lastname: D'Amours
authors.forename: E P
authors.initials: EP
authors.lastname: Korpach
authors.forename: A
authors.initials: A
authors.lastname: Bellivier
authors.forename: T
authors.initials: T
authors.lastname: Taffary
authors.forename: A
authors.initials: A
authors.lastname: Malo
authors.forename: M
authors.initials: M
authors.lastname: Bean
authors.forename: I
authors.initials: I
authors.lastname: Hoffman
authors.forename: M
authors.initials: M
authors.lastname: Jean
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D004784:Environmental Monitoring; D055904:Meteorology; D008962:Models, Theoretical; D009864:Ontario; D014980:Xenon Radioisotopes / Q000032:analysis*
chemical_list: D000396:Air Pollutants, Radioactive; D014980:Xenon Radioisotopes