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| Number | Title | Issue Date |
| 8175210 | Gamma thermometer axial apparatus and method for monitoring reactor core in nuclear power plant A method for collecting data regarding the operating condition of a nuclear reactor core including: positioning a first linear array of gamma thermometer (GT) sensors in a first instrument housing; positioning a second linear array of GT sensors in a second instrume... | 05/08/2012 |
| 7894565 | Subcritical reactivity measurement method A method of determining the spatially corrected inverse count ratio (SCICR) used to determine reactor criticality, which subtracts a background noise signal from the source range detector output. The method monitors the source range detector signal at two different ... | 02/22/2011 |
| 7668280 | Nuclear fuel assembly A nuclear fuel assembly having an instrumentation tube having an insert that centers the in-core instrumentation while permitting bugling or welding of the instrumentation tube wall to a grid strap to obtain a rigid connection there between at any elevation along th... | 02/23/2010 |
| 7349517 | System for measuring burn-out of fuel elements of a high-temperature reactor The burnout of a fuel element in a reactor is determined by first transferring a fuel element from a reactor to a measuring position and then subjecting the transferred fuel element at the position to a neutron flux. A first detector measures the total γ radiation ... | 03/25/2008 |
| 7333585 | Radiation measurement device A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sample... | 02/19/2008 |
| 7302028 | Instrumented capsule for nuclear fuel irradiation tests in research reactors An instrumented capsule for nuclear fuel irradiation tests in research reactors includes an outer shell; a rod tip assembly assembled to a lower end plate of the shell, thus absorbing impact; fuel rod assemblies supported in the shell by means of support tubes and h... | 11/27/2007 |
| 7268354 | Method for operation of a counting radiation detector with improved linearity A method is for operation of a counting radiation detector, in particular of a counting X-ray detector, with improved linearity, in which each detector element of the counting radiation detector supplies counting pulses at counting rates as a function of a number of... | 09/11/2007 |
| 7266481 | Method, arrangement and computer program for determining standardized rod types for nuclear reactors A method, arrangement and computer program is described for determining a set of standardized rod types for use in a nuclear reactor core. The method may include defining a set of rod type-related limits, and determining, based on the limits, an initial population o... | 09/04/2007 |
| 7233886 | Adaptive modeling of changed states in predictive condition monitoring An improved empirical model-based surveillance or control system for monitoring or controlling a process or machine provides adaptation of the empirical model in response to new operational states that are deemed normal or non-exceptional for the process or machine.... | 06/19/2007 |
| 7231333 | Method and arrangement for developing core loading patterns in nuclear reactors In the method, a set of limits applicable to a core may be defined, and a test core loading pattern design, to be used for loading the core, may be determined based on the limits. Reactor operation on at least a subset of the core may be simulated to produce a plura... | 06/12/2007 |
| 7200541 | Method and arrangement for determining nuclear reactor core designs In the method, a set of limits are defined and a reference core design is generated based on the limits, and includes an initial loading pattern of current fresh fuel bundles arranged in a plurality of fuel locations. A unique subset of fresh fuel bundles is selecte... | 04/03/2007 |
| 7151815 | Nonintrusive method for the detection of concealed special nuclear material A method and associated apparatus for detecting concealed fissile, fissionable or special nuclear material in an article, such as a shipping container, is provided. The article is irradiated with a source of fast neutrons, and fast neutrons released by the fissile o... | 12/19/2006 |
| 7142625 | Nuclear material detection apparatus and method A device for detecting photonuclear-induced neutrons is described herein. One embodiment of the device may comprise a neutron detector and a detection circuit. The neutron detector may comprise a detector output. The detection circuit may be operatively connected to... | 11/28/2006 |
| 7139355 | Method of operating a nuclear power plant at multiple power levels A method of operating a nuclear power plant includes determining and licensing a maximum power level at which the power plant can be operated subsequent to the beginning of a fuel cycle, and with the power plant being operated at less than its maximum power rating a... | 11/21/2006 |
| 7139354 | Radiation measurement device A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sample... | 11/21/2006 |
| 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 gear, a detector cable carrying a detector; and a double indexing pa... | 11/07/2006 |
| 6957172 | Complex signal decomposition and modeling A system, method and program product for monitoring a complex signal for ultrasensitive detection of state changes, or for signature recognition and classification is provided. A complex signal is decomposed periodically for empirical modeling. Wavelet analysis, fre... | 10/18/2005 |
| 6950489 | Guide tube for an instrumentation lance extending into a pressure vessel, reactor pressure vessel, and a method for preventing the accumulation of particles outside the pressure vessel in a guide tube The invention relates to a guide tube especially for an instrumentation lance extending into a reactor pressure vessel. The guide tube includes a lower tube section and an upper tube section that extends into the interior of the reactor pressure vessel. In order to ... | 09/27/2005 |
| 6946755 | Linear motor A small and high rigid linear motor (1), wherein a tabular heat pipe (7) is disposed between a plurality of coil rows forming an armature coil (6) along the longitudinal direction of an armature (5) with a part of the heat absorbing part ... | 09/20/2005 |
| 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 |
| 6836523 | Radiation measurement device A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sample... | 12/28/2004 |
| 6801593 | Subcritical reactivity measurement method A method of monitoring reactivity changes in a nuclear reaction when the nuclear reaction is subcritical. The method controls the parameter of the nuclear reaction that affects reactivity of the reaction to slightly alter the reactivity while monitoring an output of... | 10/05/2004 |
| 6785633 | Method and apparatus for assessing performance of combined cycle power-plants A method of determining performance impact of individual components of a power plant on overall thermal performance of the power plant, the method including (a) designing a first thermal model of the power plant using original specification data of the power plant; ... | 08/31/2004 |
| 6744840 | Incore monitoring method and incore monitoring equipment An incore monitoring method of a nuclear reactor, includes, measuring neutron flux levels at pitch levels corresponding to local power range monitor sensors arranged along an axial direction inside a detector assembly installed in a nuclear reactor; performing power... | 06/01/2004 |
| 6674826 | Method of operating a nuclear power plant at multiple power levels A method of operating a nuclear power plant includes determining and licensing a maximum power level at which the power plant can be operated subsequent to the beginning of a fuel cycle, and with the power plant being operated at less than its maximum pow... | 01/06/2004 |
| 6633622 | Reactor power output measurement device A reactor power output measurement device measuring a neutron flux with a traversing incore probe (TIP) traversing in a vertical direction in a core of a reactor, and calibrating a detection sensitivity of a local power range monitor based on a measured n... | 10/14/2003 |
| 6598029 | Bidding for energy supply with request for service An auction service is provided that stimulates competition between energy suppliers (i.e., electric power or natural gas). A bidding moderator (Moderator) receives bids from the competing suppliers of the rate each is willing to charge to particular end u... | 07/22/2003 |
| 6563899 | Neutron monitoring system The neutron monitoring system measures neutrons by counting both the negative pulse signals and the positive noise pulse signals output from a neutron detector 1, and subtracts the positive pulse count from the negative pulse count per unit time, thereby ... | 05/13/2003 |
| 6553090 | Control system of nuclear power plant, and control method thereof A method of controlling a nuclear power plant includes determining a first maximum linear heat generation rate and a first minimum critical power ratio by a core monitoring system, and determining a second maximum linear heat generation rate and a second ... | 04/22/2003 |
| 6542565 | Semiconductor radiation source power monitor A solid state semiconductor neutron detector that automatically varies its sensitivity to provide a pulsed output over the entire range of operation of a nuclear reactor. The sensitivity is varied by changing the thickness or makeup of a converter layer t... | 04/01/2003 |
| 6522709 | Nuclear in-core instrument (ICI) assembly with compressed flexible hose sheath A protective hose, and a method of making the same, for an in-core instrument assembly used in a nuclear reactor, including a first end that is hermetically sealed to a first member of in-core instrument assembly such as a bullet nose, a second end that i... | 02/18/2003 |
| 6519306 | Neutron monitoring system The neutron monitoring system measures neutrons by counting both the negative pulse signals and the positive noise pulse signals output from a neutron detector 1, and subtracts the positive pulse count from the negative pulse count per unit time, thereby ... | 02/11/2003 |
| 6493412 | Method of calibrating exit thermocouples in a nuclear reactor The exit thermocouples of a pressurized water reactor (PWR) are calibrated by recording the thermocouple temperature measurements periodically during power ascension of the reactor together with a predicted power at the corresponding locations at the same... | 12/10/2002 |
| 6477219 | Nuclear reactor power distribution monitoring system and method including nuclear reactor instrumentation system A nuclear reactor instrumentation system including a plurality of incore nuclear instrumentation assemblies arranged in a gap between a number of fuel assemblies charged in a reactor core. The incore nuclear instrumentation assemblies each include a fixed... | 11/05/2002 |
| 6477218 | Control system of nuclear power plant, and control method thereof A control system, and a control method, of a nuclear power plant capable of easily executing automatic output regulation by an automatic power regulator system even when a lower-accuracy maximum linear heat generation rate and a lower-accuracy minimum cri... | 11/05/2002 |
| 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 flux in a reactor pressure vessel, comprises a neutron flu... | 09/24/2002 |
| 6430247 | Method and system for monitoring at least one operating parameter of the core of a nuclear reactor Neutron flux is measured using a subset of detectors (8) selected from a set of detectors (8) introduced into fuel assemblies (2) of the core (1) to obtain measurement signals, the number n of detectors (8) of the subset being at most equal to 15% of the ... | 08/06/2002 |
| 6408041 | In-core fixed nuclear instrumentation system and power distribution monitoring system In an in-core fixed nuclear instrumentation system for a reactor, each of a plurality of in-core nuclear instrumentation assemblies has a nuclear instrumentation tube. LPRM detectors are housed in the nuclear instrumentation tube for detecting LPRM signal... | 06/18/2002 |
| 6406064 | Positive locking device for reactor instrumentation protection sleeve assembly A locking device for a reactor instrumentation protective sleeve and reactor instrumentation column assembly. The locking device includes a protective sleeve coupled to the instrumentation column by a selectively operable and closeable clip assembly. The ... | 06/18/2002 |
| 6404437 | Nuclear reactor core performance data visualization system A nuclear reactor core performance data visualization system provides a method and apparatus for extracting and visually displaying large amounts of numerical performance data acquired from an operational nuclear reactor or from a nuclear reactor core sim... | 06/11/2002 |
