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Radiation Protection Dosimetry Advance Access published online on May 17, 2007
Radiation Protection Dosimetry, doi:10.1093/rpd/ncm212
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

RADIATION DOSE ASSESSMENT AT AMANG PROCESSING PLANTS IN MALAYSIA

M. Omar*, I. Sulaiman, A. Hassan and A. K. Wood

Malaysian Nuclear Agency (Nuclear Malaysia), Bangi, 43000 Kajang, Selangor D.E., Malaysia

* Corresponding author: muhamat{at}nuclearmalaysia.gov.my

Received August 16, 2006, amended February 28, 2007, accepted March 5, 2007

Measurements of external radiation level, radon/thoron daughters concentrations in air and uranium/thorium concentrations in airborne mineral dust at 16 amang plants in Malaysia were carried out for three consecutive months to assess radiation dose to workers. Estimated occupational dose was within the range of 1.7–10.9 mSv y–1. The mean total dose at the amang plants was 4.1 mSv y–1. Overall, it was found that the major dose contribution of 80% came from external radiation. Radon/thoron daughters and airborne mineral dust contributed to only 11 and 9% of the total dose, respectively.


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