Examination of local atmospheric transport of radioxenon in the Ottawa River Valley

Concentrations of the radioxenon isotopes 133Xe and 135Xe were measured as they were released from the stack at the Chalk River medical isotope production facility and were then measured at various sites in the Ottawa River Valley. Dispersion modeling was then used to model the local transport of these radioxenon isotopes between the production facility and the sampling locations. The ratio of 135Xe/133Xe was also examined using an ORIGEN-ARP model was used to understand what factors played a role in the 135Xe/133Xe ratio at the time of release by considering irradiation time, flux, and decay time prior to fractionation.