Determination of 45Ca and γ-emitting radionuclides in concrete from a nuclear power plant
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H. Ervanne
Abstract
For estimation of the activity of the long-lived 41Ca isotope in seven concrete samples exposed to a varying neutron flux, 45Ca activities in the samples were determined. Instead of total dissolution the concrete samples were treated with 8 M HCl and HNO3 for partial dissolution of calcium. From the leachate, stable calcium was determined by AAS and 45Ca activity with LSC after radiochemical separation while the total stable calcium in the concrete samples was determined by XRF. Calcium was separated from the leachates using cycles of precipitation and ion exchange. In addition to 45Ca, seventeen γ-emitting radionuclides were detected directly in the concrete samples by γ-spectrometry. Ratios of 45Ca activity concentrations to those of γ-emitting nuclides in the concrete samples with varying dose were more or less identical. Determination of 63Ni activity in the concrete samples failed because activity levels were below the detection limit.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Redox stability of neptunium(V) and neptunium(IV) in the presence of humic substances of varying functionality
- Differential pulse cathodic stripping voltammetric determination of uranium with arsenazo-III at the hanging mercury dropping electrode
- Effect of pH and ionic strength on sorption of Eu(III) to MX-80 bentonite: batch and XAFS study
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- Extraction of long-lived radionuclides 152,154Eu and 134Cs using environmentally benign aqueous biphasic system
- Determination of major and trace elements in iron-nickel-copper-cobalt ore reference materials using k0-NAA
- Development and implementation of k0-INAA standardization at 10 MW Pakistan research reactor-1
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