Abstract
The creep properties of 16% cold-worked Zircaloy-2 are being evaluated over the 232 to 299 deg C temperature range. helium density measurements were made on samples of UO/sub 2/, and the results are tabulated. Phase boundaries in the Zr--1 wt.% U alloy system were studied. Results of 168-hr corrosion testing of U--Nb and U--Mo alloys in 680 deg F water are given. The reaction between U and water or water vapor is being studied at temperatures ranging up to 200 deg C. Data are given on the hardness and fabricability of some new Nb alloys along with oxdiation data for Nb and Nb alloys in dry air at 1000 to 1200 deg C. The ternary system uranium --nitrogen --carbon is being studied to determine the stability of solid-solution phases of uranium carbides and nitrides, and to investigate the possible existence of ternary phases. Creep data are given for tantalum during exposure to high-temperature sodium. (W.L.H.)
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