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Class Information
Number: 976/DIG.52
Name: Nuclear technology > Reactor fuel elements and their assemblies; selection of substances for use as reactor fuel elements [g21c-3/00] > Fuel elements [g21c-3/02] *** (manufacturing dig. 283) > Constructional details [g21c-3/04] > Details of the construction within the casing [g21c-3/16] > Internal spacers; other nonactive material within the casings (e.g., compensating for expansion of fuel rod; compensating for excess reactivity) [g21c-3/18] *** (interlayers dig. 53)

Patents under this class:

Patent Number Title Of Patent Date Issued
5075075 Nuclear reactor core having nuclear fuel and composite burnable absorber arranged for power peaking and moderator temperature coefficient control Dec. 24, 1991
5068082 Fuel assembly for nuclear reactor Nov. 26, 1991
4990303 Element with burnable poison coating Feb. 5, 1991
4971753 Nuclear fuel element, and method of forming same Nov. 20, 1990
4957696 Fuel element rod for a water-cooled nuclear reactor Sep. 18, 1990
4911881 Spring packed particle bed fuel element Mar. 27, 1990
4908180 Pressurized water nuclear reactor with a fuel rod containing a nuclear fuel column enriched to a variable extent over the length of the rod Mar. 13, 1990
4880597 Alloy coated fuel cladding Nov. 14, 1989
4871509 Fuel column retainer using radially compressed spring Oct. 3, 1989
4853177 Void plug for annular fuel pellets Aug. 1, 1989
4824634 Element with burnable poison coating Apr. 25, 1989
4818477 PCI resistant fuel and method and apparatus for controlling reactivity in a reactor core Apr. 4, 1989
4783311 Pellet-clad interaction resistant nuclear fuel element Nov. 8, 1988
4774051 Sintered nuclear fuel compact and method for its production Sep. 27, 1988
4717534 Nuclear fuel cladding containing a burnable absorber Jan. 5, 1988
4699757 Nuclear fuel rod having pellet stack holding means Oct. 13, 1987
4683114 Burnable absorber-containing nuclear fuel pellets and formation of the same Jul. 28, 1987
4683113 Nuclear fuel assembly Jul. 28, 1987
4678924 Method of setting a stop means inside of a tubular element Jul. 7, 1987
4678629 Nuclear fuel pellet containing gadolinia Jul. 7, 1987
4671927 Nuclear fuel rod containing a hybrid gadolinium oxide, boron carbide burnable absorber Jun. 9, 1987
4668468 Reactivity control of nuclear fuel pellets by volumetric redistribution of fissile, fertile and burnable poison material May. 26, 1987
4636352 Nuclear fuel rod with burnable plate and pellet-clad interaction fix Jan. 13, 1987
4587090 Fuel assembly for boiling water reactor May. 6, 1986
4587088 Coating a nuclear fuel with a burnable poison May. 6, 1986
4297168 Nuclear fuel assembly and process Oct. 27, 1981
4235673 Chip sleeve for nuclear fuel elements Nov. 25, 1980
4111748 Nuclear fuel rod with stress relieving device Sep. 5, 1978
4080253 Expandable device for a nuclear fuel rod Mar. 21, 1978
4054487 Nuclear fuel rods Oct. 18, 1977
4036691 Nuclear fuel element Jul. 19, 1977
4004972 Nuclear fuel element Jan. 25, 1977
3988075 Nuclear fuel element Oct. 26, 1976
3963566 Nuclear fuel column retainer Jun. 15, 1976

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