Abstract
To determine current radiation background of the environment at the “Giricic” location in Kastel Gomilica, Croatia, in situ measurement of radon concentration (222Rn and 220Rn) in an open atmosphere on a ground level and at the height of 1.5m has been made as well as total gamma radiation at the height of 1m in an energy range of 15keV to 2MeV. The researched location was divided in three specific parts: (i) regulated area with the bottom ash and flying ash in the basis (“old” depot), (ii) unregulated area with waste materials, including bottom ash and flying ash, in the basis (“new” depot), (iii) uncontaminated area with no waste materials deposited on. Average radon concentration on a ground level was 213Bq/m3 for the “old” depot, 214Bq/m3 for the “new” depot and 59Bq/m3 for the uncontaminated area and at the height of 1.5m 20Bq/m3 for the “old” depot, 34Bq/m3 for the “new” depot and 26Bq/m3 for the uncontaminated area. Average total gamma radiation values in selected energy range were 109.92cps (counts per second) for the “old” depot, 357.76cps for the “new” depot and 65.97cps for the uncontaminated area. For selected radionuclides (214Pb, 137Cs, 228Ac, 234mPa, 40K and 214Bi) average gamma radiation values at characteristic energies have been determined as well.
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