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Active and Passive Radon Measurements inside Dendera Ancient Temple, Egypt. |
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PP: 89-93 |
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doi:10.18576/jrna/070312
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Author(s) |
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A.S. Hussein,
A.M.El-Arabi,
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Abstract |
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| The purpose of this investigation was to measure radon activity concentrations and the equilibrium factors in the air of underground cavities in an ancient temple, namely, Dendera temple, 600 km south of Cairo, Egypt. The measurements were performed monthly for a year using an active technique with an Alpha GUARD detector and the passive technique with the diffusion cups equipped with bare and filtered LR-115 nuclear track detectors. The results from the passive measurements showed a seasonal variation of radon activity concentrations, with summer maxima and winter minima, in the place under investigation and it was found that the concentration strongly correlate with the temperature difference between the inside and outside place under investigation. The yearly mean radon activity concentration and the equilibrium factor were determined inside the crypt of Dendera temple. The estimated annual effective dose to workers, tour guides, and tourists did not exceed the lower bound of the ICRP action levels. |
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