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8183537 |
Neutron detection system
A neutron detector system including a neutron sensitive reaction layer may be configured to react with incident neutrons to form energetic particles. An energetic particle capturing layer may be...
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8183531 |
System and method for tomography combining single and paired photons
Methods and systems for producing an image. Measurement data is obtained for a coincidence photon event, and a line projector function is generated based on the obtained measurement data....
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7964852 |
Neutron sensitivity using detector arrays
A detector array includes a plurality of neutron detectors. Each neutron detector includes an anode and a cathode including at least some B-10 boron. The array includes at least one gamma detector...
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7902518 |
Non-invasive battery analysis via micro-computed tomography
A non-invasive multi-step process that includes tomography is applied to determine features of a battery.
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7763861 |
Determining a characteristic of atomic particles affecting a programmable logic device
Methods and systems are provided for determining a characteristic of an atomic particle affecting a programmable logic device (PLD). The PLD is configured to generate a value at one or more...
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7755015 |
Real-time multiplicity counter
A neutron multi-detector array feeds pulses in parallel to individual inputs that are tied to individual bits in a digital word. Data is collected by loading a word at the individual bit level in...
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7728306 |
Neutron logging tool having source and target with deuterium-tritium gas admixture
An accelerator-based neutron tool is provided. The tool includes a deuterium-tritium gas mixture such that the tool outputs a desired ratio of 2.45 MeV and 14 MeV neutrons.
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7550737 |
Battery
A non-invasive multi-step process that includes tomography is applied to determine features of a battery.
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7505544 |
Method and apparatus for detecting and classifying explosives and controlled substances
A system for detecting and classifying small amounts of explosives and other controlled substances while rejecting confounders, including a source/detector array formed of a plurality of sources...
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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...
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7133488 |
Neutron flux mapping system for nuclear reactor
A neutron flux mapping system for a nuclear reactor including: drivers each including a geared motor, a helical gear driven by the geared motor, and a storage reel adapted to supply, to the helical...
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7026627 |
Neutron/gamma ray survey instrument with directional gamma ray sensitivity
A portable survey instrument and methodology yield intensity of neutron radiation, intensity of gamma radiation, and a direction of impinging gamma radiation. The instrument uses a neutron detector...
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6953937 |
Method and apparatus for the detection of neutrons and gamma rays
A pulse discrimination method for discriminating between pulses having a short decay period and a long decay period, may comprise: Detecting the pulse; integrating a rise portion of the pulse;...
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6703606 |
Neutron burst timing method and system for multiple measurement pulsed neutron formation evaluation
A method is disclosed for measuring neutron interaction properties of an earth formation. The method includes irradiating the formation with bursts of high energy neutrons. The bursts have a...
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6456681 |
Neutron flux measuring apparatus
A neutron flux measuring apparatus, adapted to a boiling-water reactor (BWR) of a nuclear power plant and an advanced boiling-water reactor (ABWR) of a nuclear power plant, for measuring a neutron...
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5818054 |
Substance detection device using monoenergetic neutrons
A method and apparatus for non-invasively determining the internal composition of objects are disclosed. The object of interest is probed with low energy, monoenergetic narrow beams of fast...
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5648268 |
Radionuclide exchange detection of ultra trace ionic impurities in water
The present invention is directed to an analytic method for detecting trace elements in fluid solution. A cation exchange resin is packed with a radiolabelled exchange material having certain...
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5557108 |
Integrated substance detection and identification system
An apparatus and method for non-destructively detecting and identifying narcotics, explosives, and other forms of contraband concealed within a container or otherwise hidden from view. A...
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5543623 |
Method for detecting and mitigating underground organic contamination
This technique for detecting underground contamination by organic fluids employs a plurality of spaced-apart boreholes adjacent a region to be tested for contamination. A neutron backscatter gauge...
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5532492 |
Nuclear gauge with compensation for sample irregularities
A neutron gauge is described for determining the moisture content of a moisture containing material. Samples of the moisture containing material are confined in a sample pan and a sample cover with...
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5440136 |
Anisotropic neutron scatter method and apparatus
A non-invasive inspection system employs the isotropic, resonant scattering of neutrons from an object to determine the presence of at least one preselected element therein. A monoenergetic neutron...
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5300781 |
Non-hydrogenous process level measurement
A process measurement system that utilizes fast neutron backscattering for measuring density, level, and interfaces of substantially non-hydrogenous materials. The present invention substantially...
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5296712 |
Detector time-gating for neutron radiographic imaging
A source of neutrons is pulsed. A resultant flow of pulsed neutrons is detected and initiates a time delay. During the time delay, more quickly moving sources of radiation, such as fast and...
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5229066 |
Control rod position indication system
The present invention is a system which determines nuclear reactor control rod axial position using a deviation signature database generated from a current or reference signal pattern produced by...
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5204527 |
Neutron particle energy detector
An apparatus and method utilize a neutron sensitive medium in which initially existing atoms of the medium are divided into particles, reaction energy and neutron energy. The medium undergoes...
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5142153 |
Energy discriminating, resonant, neutron detector
A neutron detector includes a constituent or added sensitizer which enhances the detector's response to neutrons, of a preselected energy. Also disclosed are analytical techniques employing the...
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5057268 |
Method and composition of matter for detecting large quantities of paper currency
Paper notes used as a monetary currency are deuterated. The level of deuteration while not complete, is high. For U.S. currency the level of deuteration is at least 0.1 mg of deuterium for each one...
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4938916 |
Flux enhancement for neutron radiography inspection device
A neutron radiography system having a high energy neutron generator (100) of the type comprising an ion accelerator (106) and a tritium target (110) located downstream of the accelerator. The...
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4933556 |
Temperature measuring using neutron transmission
The temperature of an object (10) is measured by monitoring the thermal Doppler broadening of resonances in its neutron transmission characteristics, as neutrons (11) pass through it from a source...
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4918315 |
Neutron scatter method and apparatus for the noninvasive interrogation of objects
A system and method for the inspection and/or search for concealed objects impinges a monoenergetic neutron beam upon an object, notes the energy distribution of the neutrons scattered from the...
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4870278 |
Wide-range fluid level detector
The range of a neutron backscatter fluid level detector is extended to provide essentially continuous level indication by interpolating neutron backscatter counts of neutrons supplied from a...
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4837442 |
Neutron range spectrometer
A neutron range spectrometer and method for determining the neutron energy spectrum of a neutron emitting source are disclosed. Neutrons from the source are collimnated along a collimation axis and...
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4766319 |
Portable nuclear moisture-density gauge with low activity nuclear sources
The nuclear moisture-density gauge of the present invention employs a low activity neutron radiation source and a low activity gamma radiation source. In order to achieve more accurate density...
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4754136 |
Method of detecting underground tank leak
A non-destructive and non-invasive method of detecting underground tank leaks using three phase testing. A plurality of boreholes are drilled around the tank with the boreholes preferably extending...
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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...
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4645935 |
Method and apparatus for measuring thermal neutron absorption cross-section
The thermal neutron absorption cross-section of a sample is measured by placing the sample in a sample container which surrounds a cavity within which a neutron source is positioned. A detector is...
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4620800 |
High level gamma radiation dosimeter
A direct dosimeter for measuring gamma radiation flux having dose rates in excess of 0.1 megarad/hr. The dosimeter includes a gamma heating material such as aluminum or lead positioned in an...
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4617466 |
Direct fissile assay of enriched uranium using random self-interrogation and neutron coincidence response
Apparatus and method for the direct, nondestructive evaluation of the 235 U nuclide content of samples containing UF6, UF4, or UO2 utilizing the passive neutron self-interrogation of the sample...
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4582991 |
Method of measuring the density of a material
A method of measuring the density of a first material containing a moderator of fast neutrons comprising the steps of: emitting fast neutrons into a sample having a predetermined volume confined in...
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4575634 |
Assaying composite structures
Measurement of the amount of a constituent such as glass in a composite structure, by passing neutrons or gamma rays through the structure and measuring the degree to which the neutrons or gamma...
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4497769 |
Portable instrument for inspecting irradiated nuclear fuel assemblies
A portable instrument for measuring induced Cerenkov radiation associated with irradiated nuclear fuel assemblies in a water-filled storage pond is disclosed. The instrument includes a...
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4498007 |
Method and apparatus for neutron radiation monitoring
A self-calibrated neutron radiation monitor includes a flux responsive element comprised of intrinsic silicon neutron detectors and self-calibration resistors in a single structure. As the...
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4463264 |
Lightweight neutron detector
A neutron detector is disclosed which uses the moderating material as the structural support for the neutron detector element. A thin metal liner is affixed to the inside of the plastic moderating...
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4419578 |
Solid state neutron detector
A solid-state neutron detector for detecting both fast and slow neutrons comprises two layers, one of which contains a neutron-sensitive first material and the other of which contains a...
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4389568 |
Method for monitoring irradiated nuclear fuel using Cerenkov radiation
A method is provided for monitoring irradiated nuclear fuel inventories located in a water-filled storage pond wherein the intensity of the Cerenkov radiation emitted from the water in the vicinity...
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4379118 |
Process for measuring a continuous neutron flux and measuring apparatus for carrying out this process
The invention relates to a process for measuring a continuous neutron flux, and to an measuring apparatus for carrying out this process. According to the invention, a probe is disposed in the...
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4297581 |
Method for the fast and accurate identification of core power in nuclear reactors
A method is disclosed for rapidly and accurately generating an output signal corresponding to the power of a nuclear reactor core. The method comprises generating out of core neutron flux signals...
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4282435 |
Mono-energetic neutron void meter
The ability to measure the ratio of vapor versus liquid in a nuclear steam generating system is highly desirable, particularly since, during transient events such as rapid depressurization, the...
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4268754 |
Radioactivation method for simultaneous determination of nitrogen, phosphorus and potassium content in plants and fertilizers
According to the invention, the radioactivation method for simultaneous determination of the nitrogen, phosphorus and potassium content in plants and fertilizers consists in exposing samples to be...
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4157473 |
Simplified fast neutron dosimeter
Direct fast-neutron-induced recoil and alpha particle tracks in polycarbonate films may be enlarged for direct visual observation and automated counting procedures employing electrochemical etching...
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