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Published: 1956

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A survey of development in preparation and properties of uranium dioxide was made, including powder preparation, physical measurements, fabrication and sintering, stability in water, kinetics in water, UO/sub 2/ --O/sub 2/ equilibrium and kinetics, diffusion studies, in-pile gas release, UO/sub 2/ dissolution rates, and nickel plating of UO/sub 2/ pellets for recoil experiments. The UO/sub 2/ irradiation test program is described, including steam oxidized MCW UO/sub 2/, hot pressed MCW UO/sub 2/, experiments with UO/sub 2/ rods containing 0.2 wt.% TiO/sub 2/, experimental irradiation of natural UO/sub 2/ rods, power cycling of PWR reference UO/sub 2/ fuel rods, density vs. fission product release in hot water, the second PWR bundle proof test, a statistical irradation experiment, and defect tests on Chalk River UO/sub 2/. Contributions from Battelle Memorial Inst. ceramic studies, physical and electrical property investigation of uranium oxides, and kinetics of zircorium --uranium dioxide reactions are presented. A uranium dioxide panel report from Corning Glass Works concerning rupture tests on uranium dioxide compacts, sintering methods, and corrosion tests is presented along with a summary of the uranium dioxide program at MCW, and fit tolerance tests at Hanford. Contributions for the uranium dioxide Panel sponsored by WAPD concerning physical property, fabrication, and mechanical property data are presented along with a note on the melting point of uranium dioxide from work done at KAPL. (J.R.D.).