Physics – Medical Physics
Scientific paper
2010-09-17
Radiat. Prot. Dosim. 142(2-4): 282-291, 2010
Physics
Medical Physics
17 pages including 2 tables and 3 figures; Accepted by Radiation Protection Dosimetry
Scientific paper
A first comprehensive study is presented on radioactivity concentrations and dose rates in 87 commonly used materials, manufactured or imported in Cyprus, for building purposes. The natural radioactivity of K-40, Th-232, U-238 and Ra-226 is determined using high-resolution gamma ray spectroscopy. The respective dose rates and the associated radiological effect indices are also calculated. A comparison of the measured specific activity values with the corresponding world average values shows that most of them are below the world average activity values. The annual indoor effective dose rates received by an individual from three measured imported granites and four measured imported ceramics are found to be higher than the world upper limit value of 1 mSv y-1. Hence, these materials should have a restricted use according to their corresponding calculated activity concentration index values and the related EC 1999 guidelines.
Michael Fredrick
Parpottas Y.
Tsertos Haralabos
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