title: Study on enhanced atmospheric dispersion of 41Ar at the Trombay site.
abstract: An extensive study has been carried out within the site of Bhabha Atomic Research Centre, Trombay, for examining the atmospheric dispersion of (41)Ar released from research reactors. The release rate, release height, meteorological parameters and geographical information were used to establish correlation between theoretical estimation using Gaussian plume dispersion model (GPDM) and dose/dose rate data obtained from Gammatracers (GTs). Ten monitoring locations were selected in five sectors and at different downwind distances from the release point. Analysis of dose rate data shows that the maximum dose rate (7.19 μSv h(-1)) and the total annual dose (1051 μSv) were observed at a downwind distance of 0.36 km. Average dose rates of all monitoring locations were varying from 0.03±0.02 to 0.12±0.07 μSv h(-1). The average dose rate increases at the monitoring locations placed at N to NE sectors during monsoon, and for monitoring locations placed at SW and SSE sectors during winter. The maximum dose rates, monthly and annual doses recorded by GT, have been compared with predicted values. Most of the locations show statistically significant coherence in the case of monthly dose.
authors: Radiation Safety Systems Division, Bhabha Atomic Research Centre, Trombay, Mumbai, Maharashtra 400 085, India. mkchatj@barc.gov.in
authors: M K
authors: MK
authors: Chatterjee
authors: J K
authors: JK
authors: Divkar
authors: S S
authors: SS
authors: Patil
authors: Rajvir
authors: R
authors: Singh
authors: K S
authors: KS
authors: Pradeepkumar
authors: D N
authors: DN
authors: Sharma
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D001272:Atmosphere; D001417:Background Radiation; D004867:Equipment Design; D005720:Gamma Rays; D007194:India; D008962:Models, Theoretical; D016011:Normal Distribution; D055848:Nuclear Power Plants; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000379:methods*; D012044:Regression Analysis; D015203:Reproducibility of Results; D012621:Seasons
chemical_list: D000396:Air Pollutants, Radioactive