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High Resolution Neutron Radiography and Tomography of Hydrided Zircaloy-4 Cladding Materials ...

by Tyler S Smith, Hassina Bilheux, Holly B Flynn, Jean C Bilheux, Yong Yan
Publication Type
Conference Paper
Journal Name
Physics Procedia
Publication Date
Page Numbers
478 to 482
Conference Name
10 World Conference on Neutron Radiography
Conference Location
Grindelwald, Switzerland
Conference Date

Neutron radiography for hydrogen analysis was performed with several Zircaloy-4 cladding samples with controlled hydrogen concentrations up to 1100 ppm. Hydrogen charging was performed in a process tube that was heated to facilitate hydrogen absorption by the metal. A correlation between the hydrogen concentration in the hydrided tubes and the neutron intensity was established, by which hydrogen content can be determined precisely in a small area (55 µm x 55 µm). Radiography analysis was also performed to evaluate the heating rate and its correlation with the hydrogen distribution through hydrided materials. In addition to radiography analysis, tomography experiments were performed on Zircaloy-4 tube samples to study the local hydrogen distribution. Through tomography analysis a 3D reconstruction of the tube was evaluated in which an uneven hydrogen distribution in the circumferential direction can be observed.