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  • 1990-1994  (2)
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  • 1
    Digitale Medien
    Digitale Medien
    Analysis of actinides in the primary coolant of a WWER-440 type reactor (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 170 (1993), S. 399-409 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract A simple and effective method has been developed for the determination of the transuranium isotopes in primary coolant samples of WWER-440 type reactors. Membrane filters containing undissolved particles from about one liter coolant were destroyed by mineral acids, then americium-curium isotopes and neptunium-plutonium isotopes were coprecipitated sequentially with NdF3 based on their different redox behavior. Alpha-spectra were determined by silicon semiconductor detectors connected to multichannel analyzers. Activity ratios measured in a reactor unit with a failed fuel element were compared with calculated values of the same type of reactor under similar conditions. Parameters of the defective fuel (burnup, original enrichment) could be estimated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02041476
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  • 2
    Digitale Medien
    Digitale Medien
    Determination of radiostrontium in soil samples using a crown ether (1992)
    Springer
    Journal of radioanalytical and nuclear chemistry 162 (1992), S. 307-323 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract A simple and rapid method has been developed for the separation and determination of total radiostrontium in soil. The method consists of three basic steps: oxalate precipitation to remove bulk potassium, chromatographic separation of strontium from most inactive and radioactive interferences utilizing a crown ether (Sr. Spec, EIChroM Industries, Il. USA) and oxalate precipitation of strontium to evaluate the chemical yield. Radiostrontium is then determined by liquid scintillation counting of the dissolved precipitate. When 10 g samples of soil are used, the sensitivity of the method is about 10 Bq/kg. The chemical yield is about 80%. The separation and determination of radiostrontium can be carried out in about 8 hours.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02035392
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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