Title: COMPUCEA: a high-performance analysis procedure for timely on-site uranium accountancy verification in LEU fuel fabrication plants
Authors: ERDMANN NicoleAMADOR CELDRAN PedroARBORE' PhilippeEBERLE HeinrichLUETZENKIRCHEN KlausOTTMAR H.SCHORLE H.VAN BELLE PieterLIPCSEI F.SCHWALBACH PeterGUNNICK R
Citation: ESARDA Bulletin no. 43 p. 30-39
Publisher: European Safeguards Research and Development Association
Publication Year: 2009
JRC N°: JRC55101
ISSN: 0392-3029
URI: http://esarda2.jrc.it/bulletin/bulletin_43/B_2009_043_TOC.pdf
http://publications.jrc.ec.europa.eu/repository/handle/JRC55101
Type: Articles in Journals
Abstract: COMPUCEA (Combined Procedure for Uranium Concentration and Enrichment Assay) is used for on-site analytical measurements in support of joint Euratom- IAEA inspections during physical inventory verification (PIV) campaigns in European Low-Enriched Uranium (LEU) fuel fabrication plants. The analytical technique involves the accurate determination of the uranium element content by energy-dispersive X-ray absorption edge spectrometry ( L-edge densitometry) and of the 235U enrichment by gamma spectrometry with a LaBr3(Ce) detector. For evaluation of the LaBr3 spectra a modified version of the NaIGEM code is used, which has recently been adapted to handle the presence of reprocessed uranium. This paper describes the technique, setup and calibration procedure of the instrument. Results from PIV campaigns in 2007 and 2008 are presented, which demonstrate the performance of the technique. First results obtained with a sandwich detector configuration for enhanced detection efficiency of the passive gamma spectrometry are discussed.
JRC Institute:Institute for Transuranium Elements

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