Book/Report

FZJ-2016-06474

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Test of the precision and accuracy of the isotopic analysis of high enriched uranium in biso particles

Brodda, B.-G.FZJ* ; Kirchner, H.FZJ* ; Görgenyi, T. ; Schinzer, F. ; Kuhn, E. ; Zoigner, A. ; Mainka, E. ; Deutsch, H. ; Thiele, D. ; Santner, E.

1984
Kernforschungsanlage Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/12922

Report No.: Juel-Spez-0251

Abstract: The results of the isotopic analysis of high enriched uranium (HEU) in BISO-particles are routinely about 0.2 % low in the U-235 concentration compared to the nominal abundance of the uranium feed material. This is expected to be caused by natural uranium present in the thorium feed material and it was felt that the International Atomic Energy Agency needs to confirm the accuracy of its verification measurements on such fuels. With the support of the Joint Programme on the Technical Development and Further Improvement of IAEA Safeguards between the Government of the Federal Republic of Germany and the International Atomic Energy Agency an interlaboratory experiment was performed to test the precision and accuracy of the isotopic analysis of HEU in pyro-carbon coated (Th,U) O$_{2}$ - particles (so called BISO - particles). This experiment was a follow-up to an international comparison of the chemical assay of uranium and thorium in THTR-fuel for safeguards purposes $\frac{1. 2/}{ }$. The exercise was organized under the auspices of the Institut für Chemische Technologie der Nuklearen Entsorgung of theKernforschungsanlage Jülich GmbH (KFA-ICT). The objectives and the outline of the experiment were established in a preparatory meeting held in Jülich in September 1982. The fuel fabrication plant NUKEH in Hanau provided BISO-type particles, containing high enriched uranium, for the experiment and arranged for the distribution of the samples. The sample preparation was performed at NUKEM with the assistance of an IAEA staff member. The samples were analyzed by mass-spectrometry in the following laboratories: - Bundesanstalt für Materialprüfung (BAM), Berlin. - Institut für Chemische Technologie der Nuklearen Entsorgung of KFA, Jülich. - Institut für Radiochemie of Kernforschungszentrum, Karlsruhe - NUKEM GmbH, Hanau - Safeguards Analytical Laboratory of the IAEA, Seibersdorf. The IAEA prepared a statistical evaluation of the analytical results. The objective of the project was to explain observed differences and to define the state of the art of the U-235 isotope concentration determination in U-Th fuels and to estimate the magnitude of the error components in such analyses.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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