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Radiation Protection Dosimetry Advance Access originally published online on May 8, 2006
Radiation Protection Dosimetry 2006 121(4):364-369; doi:10.1093/rpd/ncl057
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Natural radionuclides in zircon and related radiological impacts in mineral separation plants

P. P. Haridasan*, P. M. B. Pillai, A. H. Khan and V. D. Puranik

Environmental Assessment Division, Bhabha Atomic Research Centre, Health Physics Unit, Indian Rare Earths Ltd, Udyogamandal, Kerala 683 501, India

* Corresponding author: hpuire{at}vsnl.net

Received October 19, 2005, amended April 6, 2006, accepted April 12, 2006


  Abstract

The activity concentration of uranium and thorium present in zircon obtained from mineral sand industries are presented. External gamma radiation levels and inhalation of airborne dust are found to be the significant routes of radiation exposure to occupational workers. The annual average dose attributed to zircon processing is estimated to be 2.3 mSv in the plants under study. This paper presents the results of external gamma measurements, estimation of airborne radioactivity in zircon process locations and radon and thoron in the occupational environment of two mineral separation plants in India. Analyses of the solid wastes and liquid effluent generated and resultant environmental impacts are indicated.


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