title: Detection of low level gaseous releases and dose evaluation from continuous gamma dose measurements using a wavelet transformation technique.
abstract: Measurement of environmental dose in the vicinity of a nuclear power plant site (Tarapur, India) is carried out continuously for the years 2007-2010 and attempts have been made to quantify the additional contributions from nuclear power plants over natural background by segregating the background fluctuations from the events due to plume passage using a non-decimated wavelet approach. A conservative estimate obtained using wavelet based analysis has shown a maximum annual dose of 38 μSv in a year at 1.6 km and 4.8 μSv at 10 km from the installation. The detected events within a year are in good agreement with the month wise wind-rose profile indicating reliability of the algorithm for proper detection of an event from the continuous dose rate measurements. The results were validated with the dispersion model dose predictions using the source term from routine monitoring data and meteorological parameters.
authors.affiliation: Bhabha Atomic Research Centre, Health Physics Division, BARC Hospital, Anushaktinagar IDS, HPD, BARC, Mumbai, Maharashtra 400094, India.
authors.forename: Sabyasachi
authors.initials: S
authors.lastname: Paul
authors.forename: D D
authors.initials: DD
authors.lastname: Rao
authors.forename: P K
authors.initials: PK
authors.lastname: Sarkar