"Pin-cushion" Irradiation Tests of Uranium and Its Zirconium Alloys PDF Download
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Author: S. H. Paine
Publisher:
ISBN:
Category : Uranium alloys
Languages : en
Pages : 48
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Book Description
Author: S. H. Paine
Publisher:
ISBN:
Category : Uranium alloys
Languages : en
Pages : 48
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Book Description
Author:
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Category :
Languages : en
Pages :
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ABS>An irradiation test of 1/16 in. diameter x 3/16 in. long U/sup 235/ and U/sup 235/-Zr alloy specimens, in the range 2 to 20 wt.% Zr, is described. The small pins were mounted in heat transfer blocks, or ''cushions, '' in such a way that suriace roughening and length changes could be observed, recorded, and compared for five stabilizing heat treatments up to exposure levels of approximately 1% total atom burnup. Addition of 2% Zr was found to be very beneficial, but the behavior of the alloys underwent distinct changes in going from 2 to 4 wt.% Zr. Material, both as-cast and subsequently isothermally treated, changed from minus to plus elongation, whereas wrought materials, either gamma-slow cooled or isothermally treated, changed from plus to minus behavior. Data-quenched wrought material varied unpredictably. Addition of Zr up to 20% showed further improvement in stability for all treatments. Factors which may have contributed to this behavior are discussed. (auth).
Author: S. H. Paine
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Category : Chromium alloys
Languages : en
Pages : 46
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Irradiation tests on small pins of wrought and heat-treated U235-Cr alloys mounted in special heat transfer blocks or ''cushions'' are described. Three compositions, estimated at 0.03, 0.07, and 0.22 wt.% Cr, were tested in three metallurgical conditions: alpha-annealed, beta-quenched, and isothermally transformed. Radiation damage to the specimens having the first two heat treatments was very similar to that observed in unalloyed uranium of comparable history, and the isothermally treated specimens were similar to beta-annealed uranium in behavior. In spite of this essentially null result, which is associated with failure to obtain grain refinement in the specimens, there is evidence that under proper conditions chromium additions to uranium may be beneficial.
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Category :
Languages : en
Pages :
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Author: S. H. Paine
Publisher:
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Category : Alloys
Languages : en
Pages : 36
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The irradiation behavior of small pin specimens of chill-cast U-10 wt.% Pu and U-15 wt.% Pu specimens projecting from heat transfer cushions is described. The specimens were coated with a thin layer of carbonyl-deposited nickel. The 15 wt.% Pu pins showed excellent dimensional stability at 1/3 wt.% total burnup. The 10 wt.% Pu specimens were somewhat inferior, failure of one of them indicating that the improvement in performance over unalloyed uranium may be due to the restraint imposed by the cladding.
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Category : Nuclear energy
Languages : en
Pages : 1036
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Author: A. A. Bauėr
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Category : Nuclear fuel elements
Languages : en
Pages : 150
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Category : Nuclear reactors
Languages : en
Pages : 938
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Category : Science
Languages : en
Pages : 110
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Author: United States. Dept. of Commerce. Office of Technical Services
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Category :
Languages : en
Pages : 850
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