Method for determining plutonium in air filters in detection of nuclear activities
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Susanna Salminen
Summary
A method was developed to determine activities and isotope ratios of plutonium and uranium. The method includes dry and wet ashing of air filters and separation of plutonium and uranium from each other and from other nuclides on Eichrom®´s extraction chromatography resins UTEVA and TRU. Interferences in plutonium separation caused by thorium and polonium were investigated and eliminated.
A field trial was performed in Kurchatov, Kazakhstan, to test the aerosol sampling and radiochemical methods developed for plutonium and uranium. In the air samples collected, the activity of 239,240Pu varied between 0.67 and 228 Bq/kg of dust, the activity of 238Pu from 0.20 Bq/kg to 16.4 Bq/kg of dust, and the isotopic ratio 238Pu/239,240Pu between 0.011 and 2.4. Concentrations of Pu isotopes in the air were 13.4-2490 nBq/m3 for 239,240Pu and 7.2-960 nBq/m3 for 238Pu. Radioactivity of 239,240Pu in air filters from Astana varied between 0.075 and 0.72 Bq per kg of dust and that of 238Pu between 0.038 and 0.14 Bq/kg of dust. Activity concentration of 239,240Pu in the air of Astana was 5.0-130 nBq/m3.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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Artikel in diesem Heft
- Experimental studies and nuclear model calculations on (p, xn) and (p, pxn) reactions on 85Rb from their thresholds up to 100 MeV
- Theoretical treatment of the complexation of element 106, Sg, in HF solutions
- Extraction and separation of Am(III) and Sr(II) by N,N,N´,N´-tetraoctyl-3-oxapentanediamide (TODGA)
- Method for determining plutonium in air filters in detection of nuclear activities
- Advanced aqueous reprocessing in P&T strategies: Process demonstrations on genuine fuels and targets
- Uranium association with halophilic and non-halophilic bacteria and archaea
- Complex formation of uranium(VI) in periodate solutions
- Fluorescence and IR studies on the hydration state of lanthanides(III) and curium(III) in the complexes extracted with purified Cyanex301, Cyanex302 and Cyanex272
- Synthesis and characterization of uranium(VI) and thorium(IV) complexes with o-hydroxy N,N´-dimethylbenzylamine and o-carboxy N,N´-dimethylbenzylamine
- Ion exchange and chromatographic separation of cesium, strontium and europium from acidic streams using uranium antimonate
- Investigations on adsorption and transport behaviour of carrier-free silver, gold and platinum in quartz columns under vacuum conditions
