The Irradiation of Aluminum Alloy-clad Thoria-urania Pellets PDF Download
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Author: L. A. Neimark Publisher: ISBN: Category : Nuclear fuel elements Languages : en Pages : 42
Book Description
Specimens consisting of thorium oxide-uranium oxide pellets lead-bonded to extruded Al-1wt.% Ni alloy cladding were irradiated to maximum burnups of 33,200 MWd/T of oxide and to peak heat ratings. The specimens were BORAX-V fuel plates. The thorium oxide-uranium oxide solid solutions were formed by air-firing cold-pressed mixtures of thorium oxide and U3O8 to a final oxygen-to-metal atom ratio of about 2.05 to 1. Fuel compositions irradiated were 6.36, 12.7, and 25.6 wt.% UO2 in ThO2. Two specimen failures were attributed to fuel thermal expansion in areas of thin-walled cladding. The hyperstoichiometry of the fuel with respect to oxygen was believed to have caused a lower fuel thermal conductivity and abnormally large amounts of recrystallization, grain growth, and fission gas release. Fission gas release ranged from 4.6 to 82.3% of the theoretical gas generated.
Author: L. A. Neimark Publisher: ISBN: Category : Nuclear fuel elements Languages : en Pages : 42
Book Description
Specimens consisting of thorium oxide-uranium oxide pellets lead-bonded to extruded Al-1wt.% Ni alloy cladding were irradiated to maximum burnups of 33,200 MWd/T of oxide and to peak heat ratings. The specimens were BORAX-V fuel plates. The thorium oxide-uranium oxide solid solutions were formed by air-firing cold-pressed mixtures of thorium oxide and U3O8 to a final oxygen-to-metal atom ratio of about 2.05 to 1. Fuel compositions irradiated were 6.36, 12.7, and 25.6 wt.% UO2 in ThO2. Two specimen failures were attributed to fuel thermal expansion in areas of thin-walled cladding. The hyperstoichiometry of the fuel with respect to oxygen was believed to have caused a lower fuel thermal conductivity and abnormally large amounts of recrystallization, grain growth, and fission gas release. Fission gas release ranged from 4.6 to 82.3% of the theoretical gas generated.
Author: A. P. Gavin Publisher: ISBN: Category : Alloys Languages : en Pages : 50
Book Description
The specimen performed satisfactorily in spite of several factors which made conditions more severe than those expected to exist in a reactor fueled with this type of element.
Author: L. A. Neimark
Author: L. A. Neimark
Author: A. P. Gavin
Author: U.S. Atomic Energy Commission. Division of Technical Information
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Author: United States. National Bureau of Standards
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