title: Verification of 235U enrichment of fresh VVER-440 fuel assemblies.
abstract: Enrichment of uniformly and non-uniformly enriched ("profiled") fuel assemblies in a range of 1.6-4.4% was verified by gamma-ray spectrometry at a nuclear power plant (NPP). HPGe detectors and a CdZnTe (CZT) detector, the latter fitting into the central tube of the assemblies, were used for obtaining information from outer and inner fuel rods. A procedure which has minimal impact on the NPP work was developed for verifying freshly arrived assemblies under normal operational conditions, and is now in routine use.
authors.affiliation: Institute of Isotopes, Hungarian Academy of Sciences, 1525 Budapest, Hungary.
authors.forename: I
authors.initials: I
authors.lastname: Almási
authors.forename: C T
authors.initials: CT
authors.lastname: Nguyen
authors.forename: J
authors.initials: J
authors.lastname: Zsigrai
authors.forename: L
authors.initials: L
authors.lastname: Lakosi
authors.forename: Z
authors.initials: Z
authors.lastname: Hlavathy
authors.forename: P
authors.initials: P
authors.lastname: Nagy
authors.forename: N
authors.initials: N
authors.lastname: Buglyó