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Class Information
Number: 376/253
Name: Induced nuclear reactions: processes, systems, and elements > Testing, sensing, measuring, or detecting a fission reactor condition > Leak detection > Fuel element leak detection > By the detection of fission products external to the fuel element
Description: Subject matter wherein the determination is made by sensing the presence of nuclear fission reaction product outside the fuel element.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8509374 Producing a design for a nuclear fuel element Aug. 13, 2013
8155258 Fission meter Apr. 10, 2012
7778378 Leak detection method for testing fuel rods of fuel assemblies of a boiling water reactor for leaks Aug. 17, 2010
7763858 Apparatus and method for measuring radioactive material in a matrix Jul. 27, 2010
6680994 Monitoring the contents of a container by ultrasonic means Jan. 20, 2004
6570949 Method and apparatus for testing nuclear reactor fuel assemblies May. 27, 2003
6493413 Fuel assembly mechanical flow restriction apparatus for detecting failure in situ of nuclear fuel rods in a fuel assembly during reactor shutdown Dec. 10, 2002
6345082 Fuel assembly mechanical flow restriction apparatus for detecting failure in situ of nuclear fuel rods in a fuel assembly during reactor shutdown Feb. 5, 2002
6088417 Apparatus and method for leak detection Jul. 11, 2000
6067337 Multiple-sheathed sodium leakage detection apparatus May. 23, 2000
5960051 Methods and apparatus for moving fuel bundles in a nuclear reactor Sep. 28, 1999
5754610 In-mast sipping modular mast modification May. 19, 1998
5687207 Refueling machine Nov. 11, 1997
5638414 Method for detecting failure of nuclear reactor fuel Jun. 10, 1997
5602886 Neural net controlled tag gas sampling system for nuclear reactors Feb. 11, 1997
5586157 Method and apparatus for manufacturing gas tags Dec. 17, 1996
5574758 Method for measuring gamma-rays of radionuclides, particularly in primary water of nuclear reactor Nov. 12, 1996
5570400 On line sipping air delivery system Oct. 29, 1996
5546435 Fission product leak detection in a pressurized-water reactor Aug. 13, 1996
5544208 Method and apparatus for in situ detection of defective nuclear fuel assembly Aug. 6, 1996
5537450 On-line analysis of fuel integrity Jul. 16, 1996
5530728 Optical measuring system Jun. 25, 1996
5457720 System for krypton-xenon concentration, separation and measurement for rapid detection of defective nuclear fuel bundles Oct. 10, 1995
5406605 Method for designing gas tag compositions Apr. 11, 1995
5383226 Method of carrying out leak detection of nuclear fuel assemblies Jan. 17, 1995
5345479 Sensitivity enhancement for airborne radioactivity monitoring system to detect reactor coolant leaks Sep. 6, 1994
5289510 Two-dimensional position sensitive radiation detectors Feb. 22, 1994
5235624 Method and device for detecting a leak from a fuel element of an assembly for a nuclear reactor Aug. 10, 1993
5164149 Nuclide separation type of precipitator system Nov. 17, 1992
5151244 Apparatus for filtering and adjusting the pH of nuclear reactor coolant water for the testing of soluble contents therefor Sep. 29, 1992
5135706 Device for measuring radioactive contamination on large pieces Aug. 4, 1992
5098643 Method for detecting leaky rods in a nuclear fuel assembly Mar. 24, 1992
5084229 Critical heat flux test apparatus Jan. 28, 1992
5009835 Nuclear fuel rod helium leak inspection apparatus and method Apr. 23, 1991
4938917 Nuclear reactor with internal thimble-type delayed neutron detection system Jul. 3, 1990
4764335 Method and apparatus for diagnosing breached fuel elements Aug. 16, 1988
4756879 Core cover plug of a liquid metal-cooled nuclear reactor Jul. 12, 1988
4720994 Method and apparatus for the detectable release of gases Jan. 26, 1988
4696788 Process and device for detecting defective cladding sheaths in a nuclear fuel assembly Sep. 29, 1987
4675148 Failed fuel detection arrangements Jun. 23, 1987
4659544 Unitary structure of tag gas capsule and end cap of nuclear fuel cladding tube Apr. 21, 1987
4657729 Solid tags for identifying failed reactor components Apr. 14, 1987
4650637 Method and apparatus for locating a leaking fuel rod in an assembly containing many rods Mar. 17, 1987
4643866 Nuclear fuel pellet-cladding interaction test device and method modeling in-core reactor thermal conditions Feb. 17, 1987
4626401 Apparatus for inspecting fuel elements Dec. 2, 1986
4591478 Method of identifying defective particle coatings May. 27, 1986
4582670 Counting system for radioactive fluids Apr. 15, 1986
4582671 Failed fuel location detector Apr. 15, 1986
4581197 Fission gas pressure measuring instrument and method Apr. 8, 1986
4581198 Double-cylinder selector valve for detecting and locating failed nuclear fuel assemblies Apr. 8, 1986

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