A proposal for the irradiation of a thorium-uranium alloy in WR-1
Author : J. F. Walker
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Page : 0 pages
File Size : 32,15 MB
Release : 1973
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Author : J. F. Walker
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Page : 0 pages
File Size : 32,15 MB
Release : 1973
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Author : J. H. Kittel
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Page : 42 pages
File Size : 26,29 MB
Release : 1963
Category : Alloys
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Three separate irradiation experiments were completed with Th and Th-U alloys. In the first experiment, three-rolled plates of Th and Th-5 wt% U alloy irradiated to total atom burnups up to 1.5% at 200 deg C showed no anisotropic growth and decreased in density at a rate of 1% per wt.% burnup. In the second experiment, 15 swaged specimens of Th and of the alloys Th-0.1 wt% U, Th-1.4 wt% U, and Th-5.5 wt% U were irradiated to burnups ranging from 0.3 to 3.6% of all atoms at temperatures in the range of 45 to 200 deg C. Again, no anisotropic growth was observed and densities decreased at rates near 1% per wt.% burnup. A Th-1.4 wt% U alloy specimen with 2.0 wt.% burnup was found to have retained significant room-temperature ductility. In the final experiment, a group of 44 chill-cast specimens of Th alloys containing 10, 15, 20, 25, and 31 wt% U were irradiated to burnups ranging from 0.16 to 10.1% of all atoms. Maximum irradiation temperatures ranged from 260 to over 1000 deg C. Surface roughening occurred in the alloys containing 25 and 31 wt% U. Volume increases at any given temperature for all alloys were linear with increasing burnup. The rate of volume increase for all alloys rose from approximately 1% per wt.% burnup at the lower temperatures to a value of 2.5 at 650 deg C. Thereafter the swelling rate increased somewhat, reaching a value of 6% volume increase per wt.% burnup at 800 deg C. The rates of volume increase under irradiation of Th-U alloys in the entire temperature range studied were significantly less than those reported for the best U-base alloys. It is suggested that the excellent resistance to high- temperature swelling of the cast Th-U alloys resulted from the fact that a dispersion of very thin U particles was obtained. A high probability, therefore, existed for fission recoils to escape from the U particles into the isotropic and less densely packed Th matrix.
Author : W. N. Hansen
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Page : 40 pages
File Size : 29,39 MB
Release : 1960
Category : Thorium alloys
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Author : F. W. Dodge
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Page : 24 pages
File Size : 33,83 MB
Release : 1958
Category : Fission products
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Author : R. W. Jones
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Page : 0 pages
File Size : 22,3 MB
Release : 1966
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Author : A. L. Bement
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Page : 48 pages
File Size : 37,55 MB
Release : 1958
Category : Metallurgy
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Author : J. F. Walker
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Page : 0 pages
File Size : 42,45 MB
Release : 1964
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Author : T. E. Bortner
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Page : 20 pages
File Size : 50,85 MB
Release : 1952
Category : Radiation dosimetry
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Author : Gordon G. Bentle
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Page : 76 pages
File Size : 42,54 MB
Release : 1961
Category : Nuclear fuel elements
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Author :
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Page : pages
File Size : 20,97 MB
Release : 1969
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