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  • Author or Editor: L’ubomír Mátel x
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Abstract  

A rapid separation method has been developed which allows measurement of plutonium, americium and strontium isotopes in the radioactive sludge from Nuclear power plant A1 Jaslovske Bohunice (NPP A1) with high chemical recoveries and effective removal of matrix interferences. This method uses different commercial products stacked AnaLig® Pu02, AnaLig® Sr01 and TRU® Resin cartridges from IBC Advanced Technologies and Eichrom Technologies. The method allows the rapid separation of plutonium, strontium and americium using a single multi-stage column in the vacuum box (cartridge technology) with rapid flow rates to minimize sample separation time. The 239,240Pu, 238Pu and 241Am were determined by alpha spectroscopy, 90Sr was counted on TRICARB 2900 TR by Cerenkov counting of its progeny 90Y.

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Abstract  

We studied the use of an extraction chromatography for determination of 90Sr in contaminated water samples. The aim of our work was to compare selected products from the point of view of the strontium chemical yields and analysis time. Three commercial products, 3M Empore™ Strontium Rad Disk, AnaLig® Sr-01 gel, Sr®Resin, and two classical methods, liquid–liquid extraction with tributhylphosphate and carbonate co-precipitation, were tested for the separation of 90Sr. The water sample from nuclear power plant A1 Jaslovske Bohunice was used for radiochemical analysis of 90Sr volume activity. Samples were traced with 85Sr to monitor strontium chemical recovery and counted either by Cerenkov counting on TRI CARB 2900 TR liquid scintillation counter or low level alpha–beta proportional counter.

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Abstract  

Two separation techniques for plutonium determination using AnaLig® Pu02 molecular recognition technology product (MRT) and extraction chromatography TRU® resin were tested. The methods performance was investigated by analysis of National Physical Laboratory (NPL-Alpha-Beta High, ABH 2003, 2005) intercomparison test samples. The results obtained for both procedures were compared in terms of activities and recoveries. Data analysis showed good agreement with the reference values. The AnaLig® Pu02 separation method for 239,240Pu, 238Pu determination was successfully validated with the same performance as the TRU® resin method.

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Abstract  

This paper describes a simple and rapid method of 99Tc pre-concentration, separation and purification by using AnaLig® Tc02 gel in two stages or AnaLig® Tc02 gel in a first stage and TEVA® resin in a second stage, which are commercially available from IBC advanced technologies, Inc. and Eichrom technologies, Inc., respectively. The method is suitable for analyzing large volume concentrate samples in a relatively short time. The use and effectiveness of AnaLig® Tc02 and Eichrom’s TEVA® resin were successfully tested by analysis of evaporator concentrate samples which belong to the class of most difficult matrices to analyze.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: Jozef Kuruc, Dávid Harvan, Dušan Galanda, L’ubomír Mátel, Monika Jerigová, and Dušan Velič

Abstract  

Electrodeposited natural uranium films prepared by electrodeposition from solution of uranyl nitrate UO2(NO3)2·6H2O on stainless steel discs in electrodeposition cell. Solutions of NaHSO4, and Na2SO4 and electric current from 0.50 up to 0.75 A were used in this study. Recalculated weights and surface’s weights of 238U from the alpha activities and secondary ion mass spectrometry (SIMS) intensities resulted in a linear regression. A dependency between of 238U surface’s weights recalculated from alpha activities and signal intensity of 238U in SIMS was investigated in order to determine a potential of SIMS in quantitative analysis of surface samples containing uranium. In the SIMS spectra of electrodeposited uranium films we found that upper layer consist not only from isotopes of uranium (ions 234U+, 235U+, and 238U+). In the positive polarity SIMS spectra, various molecules ions of uranium were suggested as UH+, UH2 +, UO+, UOH+, UO2 +, UO2H+, UO2H2 +, as well as possibly ions UNO+ and UNOH+.

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