An investigation of sampling error at low enriched uranium fabrication facilities
Studies were made of sampling error associated with the determination of the (235)U content of bulk uranic materials die to the heterogeneity of the material. Measurements were carried out by non destructive assay (NDA) techniques on bulk material, active neutron interrogation (Phonid) and passive gamma interrogation (MGA-U), followed by destructive analysis on samples of the same material, mass spectrometry and X-ray fluorescence. Measurements were performed at two low enriched uranium (LEU) facilities, at FBFC Dessel, Belgium and BNFL Springfields, Great Britain. The material considered are homogeneous uranium powder and scrap, resulting from the normal production line of both facilities. To assess the degree of heterogeneity the measurement results are interpreted by the analysis of variance (ANOVA) model and the correlation between the uranium concentration and enrichment in the case of residues is discussed.
Bibliographic Reference: Paper presented: 19th ESARDA Annul Symposium on Safeguards and Nuclear Material Management, Montpellier (FR), May 13-15, 1997
Availability: Available from (1) as Paper EN 40556 ORA
Record Number: 199710853 / Last updated on: 1997-07-08
Original language: en
Available languages: en