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PRECIPITATION-HARDENED NICKEL-BASE ALLOY FOR ATOMIC FUEL
PRECIPITATION-HARDENED NICKEL-BASE ALLOY FOR ATOMIC FUEL
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机译：沉淀法用于原子燃料的镍基硬质合金
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摘要
PURPOSE:To prevent the elution of a radioactive corrosive substance formed by the irradiation with neutron into primary cooling water by forming the oxide film of a specified element on the surface of a precipitation-hardened Ni-base alloy for an atomic fuel aggregate. CONSTITUTION:A spring to be used for the spacer ring, leak control plate, etc., of a BWR fuel aggregate is produced from 'Inconel -750 (R)' or 'Inconel 718 (R)' as a precipitation-hardened Ni-base alloy and oxidized, for example, at 704 deg.C for 20hr in the atmosphere to form an oxide film having =10 atomic % TiO2, based on the total oxide film atom, on the surface and an oxide film having =10 atomic % Cr2O3, based on the total oxide film atom, inside. The elution of the radioactive corrosion product formed in 'Inconel (R)' by the irradiation with neutron into cooling water is significantly suppressed by the double oxide film, and the radiation dose is decreased in the working environment.
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