Measurement and modelling of radioxenon plumes in the Ottawa Valley |
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Authors: | Stocki T J Armand P Heinrich Ph Ungar R K D'Amours R Korpach E P Bellivier A Taffary T Malo A Bean M Hoffman I Jean M |
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Institution: | Radiation Protection Bureau, 775 Brookfield Road, A.L. 6302D1, Ottawa, ON, Canada K1A 1C1. trevor_stocki@hc-sc.gc.ca |
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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. |
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