Preliminary experiments on irradiation cycling and partial Beta-phase irradiation of uranium

"A group of uranium specimens were irradiated under conditions in which some of the specimens were irradiated continuously while others were cycled in and out of a reactor. Although most of the specimens were irradiated under conditions in which they were entirely in the alpha phase, some were irradiated so that their centers were above alpha-phase temperatures. Both highly textured material (300 deg C rolled) and nomimally randomly oriented material (300 deg C rolled and beta-quenched) were studied. It appeared that irradiation cycling of both types of material may result in greater elongation than would be anticipated on the assumption that the effects of irradiation and thermal cycling acting alone were additive. The material rolled at 300 deg C showed no external effects due to central irradiation temperatures being above those limiting the alpha phase. However, beta-quenched material, which was irradiated so that central temperatures were above those required for stability of the alpha phase, developed severe distortions which were greater under cycling conditions. It was also noted that 300 deg C rolled uranium begins to elongate under irradiation at burnups as low as 0.0002 a/o (2 MWD/T)"

"Preliminary experiments on irradiation cycling and partial Beta-phase irradiation of uranium"@en
"Preliminary experiments on irradiation cycling and partial beta-phase irradiation of uranium"