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Class Information
Number: 376/257
Name: Induced nuclear reactions: processes, systems, and elements > Testing, sensing, measuring, or detecting a fission reactor condition > Fuel assay (e.g., burnup)
Description: Subject matter wherein the state determined is the quantity of fissionable material, i.e., material whose nuclei have the capacity to split under irradiation, in a reactor fission fuel element.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8548789 Methodology for modeling the fuel rod power distribution within a nuclear reactor core Oct. 1, 2013
8406368 Burn-up profile measuring method, burn-up profile measuring apparatus, radiation signal distribution measuring apparatus, and burn-up profile measuring program Mar. 26, 2013
8358731 Method and apparatus for detecting and classifying explosives and controlled substances Jan. 22, 2013
8194814 Detecting fission from special nuclear material sources Jun. 5, 2012
8180013 Absolute nuclear material assay May. 15, 2012
7756237 Absolute nuclear material assay Jul. 13, 2010
7529332 Detecting special nuclear materials in suspect containers using high-energy gamma rays emitted by fission products May. 5, 2009
7505544 Method and apparatus for detecting and classifying explosives and controlled substances Mar. 17, 2009
7483509 Detecting special nuclear materials in suspect containers using high-energy gamma rays emitted by fission products Jan. 27, 2009
7474725 Detecting special nuclear materials in suspect containers using high-energy gamma rays emitted by fission products Jan. 6, 2009
7349517 System for measuring burn-out of fuel elements of a high-temperature reactor Mar. 25, 2008
7277521 Detecting special nuclear materials in containers using high-energy gamma rays emitted by fission products Oct. 2, 2007
7151815 Nonintrusive method for the detection of concealed special nuclear material Dec. 19, 2006
6895065 Method and apparatus for identifying nuclear fuels May. 17, 2005
6731714 Method for measuring tritium activity in a radioactive waste drum May. 4, 2004
6704385 Method for simulating the response of a detector of radiation emitted by radioactive objects and method for controlling nuclear fuel elements using said simulation Mar. 9, 2004
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
6478948 Method of monitoring and controlling corrosion of furnace boiler tubes Nov. 12, 2002
6421405 Monitoring control rod element assembly position Jul. 16, 2002
6400787 Telemetering of uranium of plutonium in glass Jun. 4, 2002
6259757 Telemetering of uranium or plutonium in glass Jul. 10, 2001
6236699 Method and system for monitoring control rod element assembly position May. 22, 2001
6035010 Monitor for measuring both the gamma spectrum and neutrons emitted by an object, such as spent nuclear fuel Mar. 7, 2000
5378895 Gamma neutron assay method and apparatus Jan. 3, 1995
5257297 System for monitoring the radioactivity of liquid waste Oct. 26, 1993
5207976 Pellet slide and inspection assembly in a nuclear fuel pellet surface defect inspection apparatus May. 4, 1993
5185122 Gamma ray flux measurement system Feb. 9, 1993
5084229 Critical heat flux test apparatus Jan. 28, 1992
5049351 Method and apparatus for determining enrichment of uranium dioxide powder Sep. 17, 1991
5002721 Apparatus for determining number of neutrons emitted by fissile material during induced fissile Mar. 26, 1991
4920271 Multiple channel programmable coincidence counter Apr. 24, 1990
4902467 Non-destructive testing of nuclear fuel rods Feb. 20, 1990
4881247 Measuring nuclear fuel burnup Nov. 14, 1989
4822552 Method and apparatus for passively gamma scanning a nuclear fuel rod Apr. 18, 1989
4724118 Device for detecting fissionable material Feb. 9, 1988
4687605 Manufacturing automation system for nuclear fuel rod production Aug. 18, 1987
4663112 Method for determining the contents of a fuel rod May. 5, 1987
4647420 Nuclear fuel pin scanner Mar. 3, 1987
4642466 Fast counting electronics for neutron coincidence counting Feb. 10, 1987
4629600 Method and apparatus for measuring uranium isotope enrichment Dec. 16, 1986
4620100 Automated monitoring of fissile and fertile materials in large waste containers Oct. 28, 1986
4620099 Automated monitoring of fissile and fertile materials in incinerator residue Oct. 28, 1986
4617466 Direct fissile assay of enriched uranium using random self-interrogation and neutron coincidence response Oct. 14, 1986
4617169 Measurement of radionuclides in waste packages Oct. 14, 1986
4588547 Method and apparatus for determining the nearness to criticality of a nuclear reactor May. 13, 1986
4580056 Neutron event counting circuit Apr. 1, 1986
4578237 Nondestructive determination of nuclear fuel burnup Mar. 25, 1986
4564498 System for the analysis of nuclear fuel rods Jan. 14, 1986
4515749 Subcriticality measurement apparatus and method May. 7, 1985
4510117 Apparatus for in situ determination of burnup, cooling time and fissile content of an irradiated nuclear fuel assembly in a fuel storage pond Apr. 9, 1985

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