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Class Information
Number: 376/292
Name: Induced nuclear reactions: processes, systems, and elements > Reactor protection or damage prevention > Shield or barrier between radiation or heat source and object to be protected (e.g., insulation, thermal shield) > Concentric tubes or conduits
Description: Subject matter wherein the means to attenuate radiation and/or egress of material includes set of nested cylinders.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8666017 Apparatus for repairing riser pipe elbow weld in boiling water nuclear reactor Mar. 4, 2014
8559585 Cold shutdown assembly for sodium cooled reactor Oct. 15, 2013
8509375 Method for removing thermal sleeve from cold leg of reactor coolant system Aug. 13, 2013
8243870 Apparatus for removing thermal sleeve from cold leg of reactor coolant system Aug. 14, 2012
8045673 Core spray sparger T-box clamp assemblies and methods of using thereof Oct. 25, 2011
7724863 Core spray sparger T-box clamp apparatus and method for installing the same May. 25, 2010
7430266 Procedure and means for replacing and procedure for repairing a section of a pipe in the primary circuit of a nuclear reactor Sep. 30, 2008
7206372 Methods of repairing leaking elongate hollow members in boiling water reactors Apr. 17, 2007
7203263 Core spray apparatus and method for installing the same Apr. 10, 2007
7139356 Procedure and means for replacing and procedure for repairing a section of a pipe in the primary circuit of a nuclear reactor Nov. 21, 2006
6834092 Method of repairing leaking elongate hollow members in boiling water reactors Dec. 21, 2004
6421406 Core spray upper T-box to safe end attachment Jul. 16, 2002
6345084 Apparatus and methods for replacing a core spray T-box/thermal sleeve in a nuclear reactor Feb. 5, 2002
6201847 Core spray upper T-box to reactor vessel attachment Mar. 13, 2001
5892806 Pressure tube spacer Apr. 6, 1999
5796797 Method for sealing a stub tube in a nuclear reactor Aug. 18, 1998
5793829 Protective sleeve Aug. 11, 1998
5785361 Feedwater nozzle thermal sleeve Jul. 28, 1998
5725331 Process for installating a tight crossing in the wall of a cell Mar. 10, 1998
5640434 Miniaturized nuclear reactor utilizing improved pressure tube structural members Jun. 17, 1997
5600689 Method and apparatus for repairing boiling water reactor shrouds utilizing tie-rods with multiple longitudinal members Feb. 4, 1997
5591940 Protective sleeve Jan. 7, 1997
5577085 Boiling water reactor with compact containment and simplified safety systems Nov. 19, 1996
5461648 Supercritical water oxidation reactor with a corrosion-resistant lining Oct. 24, 1995
5386443 Self-expanding waterproof cover for crane hook Jan. 31, 1995
5377242 Method and system for emergency core cooling Dec. 27, 1994
5357547 Vibration dampener for dampening vibration of a tubular member Oct. 18, 1994
5282232 Nuclear reactor upper internal equipment with cluster guide devices Jan. 25, 1994
5215707 Instrument thimble tube shroud Jun. 1, 1993
5196160 Nuclear reactor head and process for obtaining same Mar. 23, 1993
5170899 Waterproof cover for crane hook Dec. 15, 1992
5135708 Method of injection to or near core inlet Aug. 4, 1992
5091140 Method of replacing a heater nozzle in a nuclear reactor pressurizer Feb. 25, 1992
5037604 Coffer dam for temporary shielding of reactor vessel internals Aug. 6, 1991
4986112 Composite pressure vessel for a nuclear environment Jan. 22, 1991
4983351 Top head penetration, hydro-ball in-core instrumentation system Jan. 8, 1991
4975241 Wear-reduction-sleeve for thimbles Dec. 4, 1990
4917853 Pipe for supporting and positioning measuring devices in the core of a nuclear reactor Apr. 17, 1990
4888149 Wear-reduction-shield for thimbles Dec. 19, 1989
4848408 Multi-layer compensator with spacers arranged between the layers Jul. 18, 1989
4840096 Device for machining chamfers on a free of a pipe Jun. 20, 1989
4834935 Feedwater sparger assembly May. 30, 1989
4826217 Apparatus and method for sealing a tube joint May. 2, 1989
4822558 Thimble guide extender for a nuclear power plant Apr. 18, 1989
4801425 Nuclear power plant having a metallic reactor pressure vessel Jan. 31, 1989
4796653 Method of enhancing residual compressive stress in double metallic tubes Jan. 10, 1989
4782727 Process of replacing a sleeve mounted within a pipe, and devices for carrying out that process Nov. 8, 1988
4778647 Vibration-damping extender for a thimble guide Oct. 18, 1988
4767593 Multiple shell pressure vessel Aug. 30, 1988
4765944 Device for the transverse retention of a movable tubular conduit in a pressurized water nuclear reactor Aug. 23, 1988

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