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| Number | Title | Issue Date |
| 7268353 | Measuring the moisture content of plutonium oxide canisters A process for measuring the moisture content in a quantity of PuO2 powder. The process detects the content of thermal neutrons emitted by the quantity of PuO2 powder and then deduces its moisture content from a value of the detected content ass... | 09/11/2007 |
| 7264725 | Hollow fiber membrane contactor and method of making same The instant invention is a hollow fiber membrane contactor, and method of making same. The hollow fiber membrane contactor includes (1) a shell, said shell having a internal bonding surface, an interlocking geometry ring being provided on said internal bonding surfa... | 09/04/2007 |
| 7244947 | Neutron detector with layered thermal-neutron scintillator and dual function light guide and thermalizing media A broad spectrum neutron detector has a thermal neutron sensitive scintillator film interleaved with a hydrogenous thermalizing media. The neutron detector has negligible sensitivity to gamma rays and produces a strong and unambiguous signal for virtually all neutro... | 07/17/2007 |
| 7208743 | Method and device for determining the personal dose in mixed neutron/photon fields The invention relates to an instrument which uses an individual semi-conductive detector with special coverings as an essential sensor, and a method whereby the amplitude information of the signals from said semi-conductive detector are used to determine a person's ... | 04/24/2007 |
| 7186987 | Organic materials and devices for detecting ionizing radiation A π-conjugated organic material for detecting ionizing radiation, and particularly for detecting low energy fission neutrons. The π-conjugated materials comprise a class of organic materials whose members are intrinsic semiconducting materials. Included in this cl... | 03/06/2007 |
| 7151266 | Nuclear cargo detector Apparatus for the inspection of cargo containers for nuclear materials comprising one or more arrays of modules comprising grounded, closed conductive tubes filled with an ionizing gas mixture such as, but not limited to, Argon:CO2. A wire is suspended al... | 12/19/2006 |
| 7105832 | Composite solid-state scintillators for neutron detection Applicant's present invention is a composite scintillator for neutron detection comprising a matrix material fabricated from an inorganic sol-gel precursor solution homogeneously doped with a liquid scintillating material and a neutron absorbing material. The neutro... | 09/12/2006 |
| 6954512 | Neutron spectrometer with aluminum proton absorber A neutron spectrometer is provided by a series of substrates covered by a solid-state detector stacked on an absorbing layer. As many as 12 substrates that convert neutrons to protons are covered by a layer of absorbing material, acting as a proton absorber, with th... | 10/11/2005 |
| 6928130 | Dodecahedron neutron spectrometer with tantalum proton absorber for aircraft A neutron spectrometer for aircraft is provided by a series of substrates covered by a solid-state detector stacked on an absorbing layer. As many as 12 substrates that convert neutrons to protons are covered by a layer of absorbing material, acting as a proton abso... | 08/09/2005 |
| 6876711 | Neutron detector utilizing sol-gel absorber and activation disk A neutron detector utilizing a sol-gel absorber incorporating a fissionable material and an activation disk. Preferably utilizing Li-6 and B-10 as fissionable material and Ag-109 as activation disk material for increased sensitivity and better differentiation of the... | 04/05/2005 |
| 6724852 | Fissile interrogation using gamma rays from oxygen The subject apparatus provides a means to identify the presence of fissionable material or other nuclear material contained within an item to be tested. The system employs a portable accelerator to accelerate and direct protons to a fluorine-compound target. The int... | 04/20/2004 |
| 6621884 | Method of monitoring neutron sensitivity of neutron detector Disclosed is a method of monitoring the neutron sensitivity of a neutron detector. Voltage having a predetermined potential difference is applied between an anode and a cathode without irradiating the neutron detector with neutrons to permit an -ra... | 09/16/2003 |
| 6452992 | Method and device for measuring the relative proportions of plutonium and uranium in a body The invention relates a device for measuring the relative proportions of uranium and plutonium in a radioactive package (16), having: a source of photons (10) for irradiating the package, at least one delayed neutron detector (18) able to deliver counting signals ... | 09/17/2002 |
| 6333958 | Advanced electronics for faster time-correlation analysis of pulse sequences This invention relates to a method and apparatus for improving the precision of at least one of neutron coincidence counting and neutron multiplicity counting. The method includes the steps of: (1) sampling the real and accidental coincident pulses at the... | 12/25/2001 |
| 6026135 | Multisensor vehicle-mounted mine detector A multisensor vehicle-mounted mine detector having one or more sensors leading the vehicle for detecting objects in the ground while moving. A navigational system tracks the coordinates of the detected objects, performs data fusion, declares whether the o... | 02/15/2000 |
| 5430777 | Neutron detection device for measuring the power of a nuclear reactor This neutron detector device includes a containment inside of which there is mounted a detector and which contains a neutral gas. The detector is formed by a fission type chamber comprising a cylindrical-shaped external electrode, coated with a lining of ... | 07/04/1995 |
| 5251242 | Bi-metallic, self powered, fixed incore detector, and method of calibrating same The present invention is a detector assembly for a nuclear reactor which includes platinum detector segments (30-40) axially distributed end to end within a reactor assembly and vanadium detector segments (42-52) spatially congruent in the same assembly. ... | 10/05/1993 |
| 5239563 | Plasma momentum meter for momentum flux measurements Invention comprises an instrument in which momentum flux onto a biasable target plate is transferred via a suspended quartz tube onto a sensitive force transducer--a capacitance-type pressure gauge. The transducer is protected from thermal damage, arcing ... | 08/24/1993 |
| 5192490 | Extended range neutron detection device for monitoring and control of nuclear reactors A neutron detection device is housed in a metal enclosure containing a first detector with a high-sensitivity fission chamber, and a second detector having a low-sensitivity fission chamber and a boron-lined ionization chamber compensated for gamma radiat... | 03/09/1993 |
| 5164149 | Nuclide separation type of precipitator system The present invention is directed to a nuclide separation precipitator system in which noble gas nuclear fission products are introduced into a gas reservoir and generate charged daughter nuclides in the gas reservoir. A collector collects three detectabl... | 11/17/1992 |
| 5141709 | Excore power level detector assembly for neutron flux monitoring system An excore neutron flux power level detector assembly includes a neutron flux detector subassembly and a moderator subassembly having the form of a dual-wall canister of annular cross-section for receiving the detector subassembly in coaxial and telescopin... | 08/25/1992 |
| 5098639 | Fission chamber with a wide measuring range and apparatus for measuring the neutron flux density using said fission chamber Fission chamber with a wide measuring range and apparatus for measuring the neutron flux density using said fission chamber. The chamber comprises an enclosure (2) filled with a gaseous medium and, in the latter, electrodes (8,10) adjacent the periphery o... | 03/24/1992 |
| 5078951 | High efficiency fast neutron threshold deflector A high-efficiency apparatus for detecting fast neutrons includes an assembly of disks of solid state charged particle detector material, or other appropriate charged particle detecting devices, disposed between adjacent thick (on the order of 1 mm) disks ... | 01/07/1992 |
| 5002720 | Electret enabled thermal neutron flux detection and measurement An improved thermal neutron flux detector and measuring apparatus of the neutron induced transmutation type. The disclosed apparatus employs a plastic film electret and a fissionable material such as uranium-235 for generating energetic ion fission fragme... | 03/26/1991 |
| 4971749 | Nuclear excitation laser type intra-reactor neutron flux measuring system A nuclear excitation laser type intra-reactor neutron flux measuring system of this invention is comprised of a laser oscillator filled with a nuclear exciting gas such as 3 He, KrF or XeF, mounted on the tip of a control rod. The nuclear excit... | 11/20/1990 |
| 4897550 | Apparatus for the characterization of fissile material having at least one neutron radiation detector located in a gamma radiation detection scintillator It comprises an enclosure, a neutron emitting source (29) for bombarding said fissile material, means (28, 30) for introducing source (29) into the enclosure and for removing said source from the enclosure, neutron radiation detection means (9), moderator... | 01/30/1990 |
| 4857259 | Neutron dosimeter A neutron dosimeter and a method for neutron dosimetry involving a two-layer structure, one layer being a fissile material, and the other being a material which changes its conductivity in accordance with a density of implanted ions. Neutrons striking the... | 08/15/1989 |
| 4853174 | Low level detector monitor A method and apparatus for monitoring the neutron flux in the core of a nuclear reactor by means of a neutron detector which is composed of two electrodes between which a d.c. bias voltage is applied and which has a greater neutron sensitivity when the d.... | 08/01/1989 |
| 4808271 | Electroplating method for producing ultralow-mass fissionable deposits A method for producing ultralow-mass fissionable deposits for nuclear reactor dosimetry is described, including the steps of holding a radioactive parent until the radioactive parent reaches secular equilibrium with a daughter isotope, chemically separati... | 02/28/1989 |
| 4804514 | Method and apparatus for neutron dosimetry A method and apparatus for measuring a neutron flux in which the neutrons induce fission reactions in the layer of fissile material, the fission reactions in turn inducing light pulses in a scintillator material. A photomultiplier tube detects the light p... | 02/14/1989 |
| 4749866 | Method for detecting and correcting for isotope burn-in during long-term neutron dosimetry exposure A method is described for detecting and correcting for isotope burn-in during-long term neutron dosimetry exposure. In one embodiment, duplicate pairs of solid state track recorder fissionable deposits are used, including a first, fissionable deposit of l... | 06/07/1988 |
| 4744939 | Method for correcting for isotope burn-in effects in fission neutron dosimeters A method is described for correcting for effect of isotope burn-in in fission neutron dosimeters. Two quantities are measured in order to quantify the "burn-in" contribution, namely PZ',A', the amount of (Z', A') isotope that is burned-in, and ... | 05/17/1988 |
| 4729866 | High fluence neutron dosimetry method A high fluence neutron dosimetry method is described, including the steps of: exposing a dosimeter containing an alpha-emitting target isotope to neutron irradiation to form an alpha-emitting product isotope; determining the alpha decay rates of the targe... | 03/08/1988 |
| 4699751 | Neutron dosimeter A dosimeter which incorporates new methods for determining neutron dose. Less than one millirad of dose due to neutrons of all energies down to approximately 103 eV can be measured, and the response can be adjusted by design of the dosimeter. T... | 10/13/1987 |
| 4667107 | Ultrafast neutron detector The invention comprises a neutron detector (50) of very high temporal resolution that is particularly well suited for measuring the fusion reaction neutrons produced by laser-driven inertial confinement fusion targets. The detector comprises a biased two-... | 05/19/1987 |
| 4634568 | Fixed incore wide range neutron sensor Disclosed is a neutron detector, provided with a sealed chamber having two spaced apart electrodes, hermetically sealed in the chamber with a seal which is located in an environment of at least two decades less neutron flux than that experienced by the de... | 01/06/1987 |
| 4623508 | Wide range flux monitor assembly A wide range flux monitoring assembly is provided for in-core neutron flux monitoring in a nuclear reactor vessel. The assembly comprises a fixed in-core power range monitor and a fixed in-core extended range start-up monitor which are connected to signal... | 11/18/1986 |
| 4614635 | Fission-couple neutron sensor Disclosed is apparatus and method which, in cooperation with an electrical system, analyzes signals generated by detectors placed in a flux field of gamma rays and neutrons. A first detector with a first sensor is coupled to the electrical system. A secon... | 09/30/1986 |
| 4581813 | Method for producing encapsulated thermocouples A method for fabricating a thermocouple unit for service in and about nuclear reactors and other radioactive environments. The method provides a thermocouple encapsulated within a sphere of fissile material.... | 04/15/1986 |
| 4578237 | Nondestructive determination of nuclear fuel burnup An apparatus (10, 110, 210) including a containment capsule (12, 112, 212) a support member (16, 116, 216) removably disposed within the capsule and carrying therein a solid state track recorder material (20, 120, 220) and a layer of fissile material (20,... | 03/25/1986 |
