title: Neutron imaging of Zr-1%Nb fuel cladding material containing hydrogen.
abstract: Hydrogen distribution and hydride phases were analyzed in reactor fuel cladding pressure tube Zr-1%Nb material up to 13,300 ppm. From neutron diffraction measurements, formation of cubic delta-ZrH2 and a small amount of tetragonal gamma-ZrH was established. Texture effects were analyzed by imaging plate technique. From neutron radiography images a linear model was set up that adequately described the relationship between gray levels and nominal H-concentrations. The H-distribution was unveiled by 3D intensity histograms and fractal analysis of multilevel-segmented neutron radiography images.
authors.affiliation: Research Institute for Solid State Physics and Optics, Budapest H-1525, POB 49, Hungary. svab@szfki.hu
authors.forename: E
authors.initials: E
authors.lastname: Sváb
authors.forename: Gy
authors.initials: G
authors.lastname: Mészáros
authors.forename: Z
authors.initials: Z
authors.lastname: Somogyvári
authors.forename: M
authors.initials: M
authors.lastname: Balaskó
authors.forename: F
authors.initials: F
authors.lastname: Körösi