Application of isotope dilution method for mass- and alpha-spectrometric determination of burn-up and uranium,plutonium and transplutonium element content in VVER-440 spent fuel |
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Authors: | T P Makarova L D Preobrazhenskaya A V Lovtsyus A M Fridkin A V Stepanov A A Lipovskii B N Belyaev |
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Institution: | 1. V. G. Khlopin Radium Institute, Leningrad, (USSR)
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Abstract: | In this report the procedures and the methodology of our versions of alpha- and mass-spectrometric techniques for destructive analysis of VVER spent fuel are discussed. These techniques allow the determination of the content of americium and curium isotopes with relative error 3–5%, that of plutonium isotopes with error ≤1% and of uranium isotopes ?0.3–0.4%. They allow one to determine the fuel burn-up using148Nd monitor with relative error not exceeding 2% at confidence level P=0.95. The investigation was directed at the increase of sensitivity of analysis to ensure that the amount of analysed material should be equivalent to ~1 mg of irradiated uranium at mean burn-up values. These techniques are based on the isotope dilution method. |
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