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A detailed feasibility study for using noble gas isotope amount ratio measurements as a method to identify reprocessing activities has been made. This was achieved by calculating alterations in the blends of atmospheric noble gases and released fission xenon and krypton using Isotope Mixture Programs. Four different scenarios were investigated and a reliable approximation of the isotope amount ratios in the blends and their respective detection limits could be obtained. A method is presented which enables the initial isotopic composition of the released fission noble gas to be recalculated by measuring the (natural) isotopic composition of the atmospheric noble gases and the blend. It is shown that highly accurate stable isotope amount ratio measurements can provide detailed information on the history of the reprocessed nuclear fuel. They could serve as a supplementary method besides more sensitive radiometric measurements for detecting reprocessing activities.

Additional information

Authors: AREGBE Y ET AL, JRC Geel (BE);MAYER K ET AL, JRC Karlsruhe (DE);POTHS J, Los Alamos National Laboratory (US)
Bibliographic Reference: Paper presented: Symposium on International Safeguards, Vienna (AT), October 13-17, 1997
Availability: Available from (1) as Paper EN 40945 ORA
Record Number: 199711388 / Last updated on: 1997-10-23
Original language: en
Available languages: en
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