Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Encased with nonfuel component
Patent
1988-07-21
1990-10-16
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Fuel component structure
Encased with nonfuel component
376457, 420422, G21C 320
Patent
active
049633163
ABSTRACT:
A fuel rod for a nuclear reactor fuel assembly includes a cladding tube having an outer surface and a given total wall thickness. Nuclear fuel is disposed in the cladding tube. The cladding tube is formed of a first zirconium alloy which may have alloy components of from 1.2 to 2% by weight of tin, 0.07 to 0.2% by weight of iron, 0.05 to 0.15% by weight of chromium, 0.03 to 0.08% by weight of nickel, 0.07 to 0.15% by weight of oxygen, and a total percent by weight for the alloy components of iron, chromium and nickel in a range of from 0.18 to 0.38% by weight. The first zirconium alloy may also have alloy components of from 1.2 to 2% by weight of tin, 0.18 to 0.24% by weight of iron, 0.07 to 0.13% by weight of chromium, 0.10 to 0.16% by weight of oxygen, and a total percentage by weight for the components of iron and chromium in a range of from 0.28 to 0.37% by weight. A surface layer which is disposed on the outer surface of the cladding tube is formed of a second zirconium alloy having a layer thickness in a range of from 5 to 20% of the given total wall thickness of the cladding tube, the second zirconium alloy being formed of at least one alloy component from the group consisting of iron, chromium, nickel and tin having a total percentage by weight of the alloy components of the group of from 0.4 to 1% by weight and/or having from 0.2 to 3% by weight of niobium as an alloy component.
REFERENCES:
patent: 4233834 (1980-11-01), Matinlassi
patent: 4717534 (1988-01-01), Morita
patent: 4735768 (1988-04-01), Stehle et al.
Garzarolli Friedrich
Stehle Heinz
Steinberg Eckard
Weidinger Hans
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Walsh Donald P.
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