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Surface Radiation Dose and Radionuclide Measurement in Ex-Tin Mining Area, Kg Gajah, Perak

Zaini Hamzah, and Ahmad Saat, and Noor Hayati Mashuri, and Seh Datul Redzuan, (2008) Surface Radiation Dose and Radionuclide Measurement in Ex-Tin Mining Area, Kg Gajah, Perak. Malaysian Journal of Analytical Sciences, 12 (2). pp. 419-431. ISSN 13942506

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Official URL: http://pkukmweb.ukm.my/~mjas/v12_n2/zaini%20hamzah.pdf

Affiliations

Universiti Teknologi MARA Shah Alam, Faculty of Applied Sciences
Universiti Teknologi MARA Shah Alam, Institute of Science
Universiti Teknologi MARA Shah Alam, Faculty of Applied Sciences
Universiti Teknologi MARA Shah Alam, Faculty of Applied Sciences

Abstract

The amount of natural radionuclide present in environment, especially soils, sediment and water in the abundance tin mining area are varies depending on the amount of heavy minerals left over in that particular place. If the place used to be the processing area for tin ores, the left over known as ‘amang’ contains heavy minerals. This study was carried out in UiTM Training Center, Kg Gajah, within Kinta Valley Perak which used to be the active tin mine area in the past. Surface doses were measured using Ludlum dose rate meter, at the surface and 1 meter above the surface. The radionuclides content were measured by collecting soil samples, dried, ground, sieved using 250 μm sieve, packed in a container and counted after 4 weeks using gamma spectrometer with HPGe detector. The level of surface dose varies from one location to another, but there is a critical area which has a significantly high surface dose approaching 30 μSv/hr. The mean activity concentrations in the critical area for 40K, 226Ra and 228Ra are 2521±298 Bq/kg, 3798±419 Bq/kg and 12896±1533 Bq/kg respectively. The hazard index for the critical area seems to be extremely high and is not safe for people to be there.

Item Type:Journal
Keywords:Surface Radiation Dose, Tin Mine, Heavy Minerals, Natural Radionuclide
Subjects:Q Science, Computer Science
ID Code:5180

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