title: Radionuclide emissions from a coal-fired power plant.
abstract: Current study concerns measurement of radioactivity levels in areas surrounding a 2420 MW thermal power plant fueled predominantly by bituminous coal. The concentrations of (226)Ra, (232)Th and (40)K in onsite bottom-ash were found to be 139 Bq/kg, 108 Bq/kg and 291 Bq/kg, respectively, the levels for these radiolnuclides in soil decreasing with distance from the power plant. At the plant perimeter the respective radionuclide concentrations were 87 Bq/kg, 74 Bq/kg and 297 Bq/kg. In a nearby town, the corresponding concentrations were 104 Bq/kg, 52 Bq/kg and 358 Bq/kg, suggestive of use of TENORM affected soils. The mean radium equivalent activities (Raeq) in soil and ash sample in the town were 205 Bq/kg and 316 Bq/kg, respectively. The Kapar plant ash/slag appears to contain a higher level of TENORM than the world average. The degree of contamination is much higher inside the town where slag has been mixed with topsoil as landfill or as simple domestic waste. For the prevailing levels of exposure and a worst case senario, the predicted committed effective dose due to ingestion and inhalation for intake durations of 1- and 30 years would be 4.2 μSv and 220 μSv, respectively.
authors.affiliation: Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia.
authors.forename: Y M
authors.initials: YM
authors.lastname: Amin
authors.forename: Mayeen Uddin
authors.initials: MU
authors.lastname: Khandaker
authors.forename: A K S
authors.initials: AK
authors.lastname: Shyen
authors.forename: R H
authors.initials: RH
authors.lastname: Mahat
authors.forename: R M
authors.initials: RM
authors.lastname: Nor
authors.forename: D A
authors.initials: DA
authors.lastname: Bradley
keywords: 2420MW Thermal power plant; Committed effective dose; External γ-ray dose rate; Radioactivity; Radium equivalent activities; Slag and soil