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Natural radioactivity concentration in raw materials used for manufacturing refractory products
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A.A. Fathivand   , J. Amidi , S. Hafezi |
| , afathivand@yahoo.com |
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Abstract: (15315 Views) |
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Background: Some Particular areas contain
natural radionuclide at levels much higher than those
usually present in earth's crust. The radiological
impact of the use of zirconium ore in zirconium
industry is due to internal exposure of the lung by
alpha particles and external exposure of the body by
the gamma rays. The result of gamma spectrometry
measurement of the concentrations of the natural
radionuclide in zirconium industry is described.
Materials and Methods: Gamma spectrometry
system with a shielded high pure germanium (HPGe)
detector connected to multi channel analyzer (MCA)
was used to determine concentrations of natural
radionuclide in about 45 samples of imported
zirconium minerals, tiles, stone ware and waste
sludge's of Iranian ceramic industry. Results: The 238U
concentration in the samples, ranging from 3000 to
10000 Bq Kg-1, is higher than the concentration of
both 232Th (500-1800 Bq Kg-1), and 40K (50-800 Bq Kg-1).
The measured specific activities in the mineral showed
that specific activity of baddeleyite is higher than that
of zircon. The results of ceramic tiles show that the
tiles usually contain small amount of zirconium
compound. Conclusion: Due to relatively high
concentration level of uranium in imported zirconium
samples, specific regulations is necessary for
zirconium compound used in ceramic industry. Iran. J.
Radiat. Res., 2007 4 (4): 201-204 |
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| Keywords: Natural radioactivity, ceramic industry, gamma spectrometry, zirconium mineral. |
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Full-Text [PDF 237 kb]
(4410 Downloads)
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Type of Study: Original Research |
Subject:
Radiation Biology
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