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The direct analysis of dissolved spent nuclear fuel by inductively coupled plasma mass spectrometry (ICP-MS) allows the elemental and isotopic composition of the irradiated fuel to be determined without any chemical separation. A qualitative evaluation was carried out on the effects of fission, beta-decay and neutron-capture reactions during fuel irradiation. Comparison of the semiquantitative data with computer predictions of fission products inventory showed satisfactory agreement. The analysis of small spent fuel samples of ICP-MS was used to assess the type and irradiation of the fuel in pattern recognition studies. Isotope dilution analysis was applied for polyisotopic elements; standard additions with an internal standard was used for monoisotopic elements. Elements determined in the residue included Zr, Mo, Tc, Ru, Rh Pd, U and Pu. Neodymium was also determined in dissolver solutions of fast neutron-irradiated fuels and the results were compared with those given by thermal ionisation mass spectrometry.

Additional information

Authors: GARCIA ALONSO J I ET AL., JRC Karlsruhe (DE)
Bibliographic Reference: Article: Journal of Analytical Atomic Spectrometry, Vol. 9 (1994) pp. 1209-1215
Record Number: 199510052 / Last updated on: 1995-01-10
Original language: en
Available languages: en