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The reprocessing plants in Sellafield and La Hague will incorporate a specially designed and optimised neutron-gamma counter (OSL-counter) for the plutonium assay in gram-sized product samples. We have carefully evaluated the performance of the OSL-counter from routine measurements on a series of representative Safeguards verification samples, which included typical PuO(2) materials from reprocessed LWR and MAGNOX fuels. Individual error components associated with neutron-coincidence counting, isotope abundance measurements by gamma spectrometry, and isotope correlation estimates for (242)Pu are delineated and compared in terms of achieved versus expected performances. The paired comparison of measurement results from neutron counting and titration proves that accuracies of 0.1-0.2% can be achieved for the Pu-element assay in gram-sized samples with external isotopic data from mass spectrometry.

Additional information

Authors: OTTMAR H, JRC Karlsruhe (DE);SCHUBERT Ø A, JRC Karlsruhe (DE);CROMBOOM O, JRC Karlsruhe (DE);EBERLE H, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: 5th International Conference on Facility Operations-Safeguards Interface, Jackson Hole (US), September 24-29, 1995
Availability: Available from (1) as Paper EN 39160 ORA
Record Number: 199610587 / Last updated on: 1996-05-27
Original language: en
Available languages: en
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