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7555092 |
System and method for continuous optimization of control-variables during operation of a nuclear reactor
A system and method is provided for a continual updating of the optimization of multiple operational control-variables during the operation of a nuclear reactor over a plurality of fuel cycles. A...
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7532698 |
Systems and methods of predicting a critical effective k for a nuclear reactor
Systems and methods for a method for determining a critical effective k at an off-rated core state of a nuclear power plant includes determining, for the off-rated core state a control rod density,...
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7366273 |
Method of determining margins to operating limits for nuclear reactor operation
In a method of determining an operating margin to a given operating limit in a nuclear reactor, operational plant data from an on-line nuclear reactor plant is accessed, and reactor operation is...
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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...
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6987826 |
Maximum extended load line limit analysis for a boiling water nuclear reactor
A method for expanding the operating domain of a boiling water nuclear reactor that permits safe operation of the reactor at low core flows is described. The operating domain is characterized by a...
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6928132 |
Methods and apparatus for operating a system
A method for operating a system having a plurality of modes and interlocks between the modes is provided. The method includes operating the system in a first mode and switching the system to a...
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6910156 |
Method and system for diagnosing a technical installation
A diagnostic method and system for a technical installation establish the cause of a fault event. A reliable, flexible and simple possible way of diagnosing an installation is provided by placing...
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6801885 |
Process for synthesizing a database for nuclear power plant containment evaluation
A method of evaluating a containment building design includes the steps of assembling a first database of test results; selecting models (algorithms) for the design to be evaluated; comparing a...
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6798859 |
Branch amplifier card
A branch amplifier card for a nuclear reactor control rod drive control system is provided. The control system includes a control processor, a plurality of transponder cards arranged in clusters...
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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...
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6674825 |
Determination of operating limit minimum critical power ratio
A method and system for thermal-dynamic modeling and performance evaluation of a nuclear Boiling Water Reactor (BWR) core design is presented. Based on a predetermined generic transient bias and...
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6608878 |
Method and device for monitoring the power rise during startup of a nuclear reactor (diversitary excursion monitoring)
A method and a device are provided for monitoring a power rise during startup of a nuclear reactor (diversitary excursion monitoring). In order to be able to shut down the reactor during startup in...
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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...
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6516041 |
Method and apparatus to eliminate confirmation switches and channel demultiplexer from soft control man-machine interface (MMI)
A method and apparatus for controlling components in a component control system in a nuclear power plant includes an image processing system and display processor (IPS-DP) for issuing an encrypted...
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6418178 |
Control rod coupling assembly for a nuclear reactor
A control rod coupling assembly for coupling a nuclear reactor control rod to a control rod drive mechanism is disclosed. The control rod drive mechanism includes an index tube and a bayonet head....
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6292523 |
Digital engineered safety features actuation system
An interface between a Plant Protection System and Engineered Safety Features in a nuclear power plant is disclosed for continuously monitoring the plant protection system initiation circuit for...
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6202038 |
Ultrasensitive surveillance of sensors and processes
A method and apparatus for monitoring a source of data for determining an operating state of a working system. The method includes determining a sensor (or source of data) arrangement associated...
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6198786 |
Methods of reactor system pressure control by reactor core power modulation
A method of controlling the system pressure in a power generating system, having a turbine-generator and a BWR, that modulates the core thermal power of the reactor while maintaining the main...
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6122339 |
Method and device for operating a reactor in an unstable state
A transiently unstable state of a boiling-water reactor is damped by measuring the oscillating neutron flux and, after a first threshold value is exceeded over a plurality of oscillation periods,...
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6061413 |
Nuclear steam supply temperature measurement system and method
A temperature measurement system includes, for each of two nuclear steam supply system (NSSS) loops, four temperature sensors each of which provides a value of the temperature of reactor coolant...
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6049578 |
Digital plant protection system
A digital plant protection system for use in nuclear power plants of the pressurized water type includes cross-connected sensed-parameter processing channels that provide a suitably conditioned...
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6021169 |
Feedwater control over full power range for pressurized water reactor steam generators
A feedwater control system and method for a pressurized water reactor steam generating system having first and second output signals. The first output signal is determined by first and second input...
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5984504 |
Safety or protection system employing reflective memory and/or diverse processors and communications
A safety or protection system includes a plurality of divisions of first signals; a plurality of safety or protection subsystems each of which receives a corresponding one of the divisions of first...
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5971580 |
Tactical awareness monitoring and direct response system
The present invention is an electronic awareness system for evaluating, monitoring, and controlling, in real-time, an outside environment having entities and occurrences with characteristics. The...
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5930315 |
Process management using component thermal-hydraulic function classes
A process management expert system where following malfunctioning of a component, such as a pump, for determining system realignment procedures such as for by-passing the malfunctioning component...
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5912933 |
Method and system for direct evaluation of operating limit minimum critical power ratios for boiling water reactors
A method and system for thermal-dynamic modeling and performance evaluation of a nuclear Boiling Water Reactor (BWR) core design is presented. A data processing system is used to execute specific...
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5881115 |
Method and system for automatically executing multiple procedures for a complex process facility
A Supervisory Sequential Controller Interface (SSCI) provides for automatic and manual sequencing of the sequential steps of multiple procedures simultaneously in a complex process facility while...
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5859885 |
Information display system
A functional approach to an information display system that enables a fast and easy understanding of the status of a complex process. The display screen is organized by process goals. Each process...
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5859884 |
Electric circuit for selectively processing electrical signals
An electrical circuit backfits into different instrumentation and control (I&C) system hardware configurations as a replacement or upgrade. The circuit has a multiple signal path processing circuit...
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5812622 |
Operator work station for nuclear power plants
The present invention relates to an operator work station for nuclear power plants which can provide plant information in an effective way during abnormal/emergency conditions so that the operator...
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5748496 |
Diagnosis system
A diagnosis system having sensors for supervising a plant, signal processors for processing signals of the sensors, and a state quantity arithmetic operation unit. The state quantity arithmetic...
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5726884 |
Integrated hazardous substance tracking and compliance
Apparatus that provides an integrated approach for all management activities for hazardous substances used or generated at a facility, including form generation and compliance with the reporting...
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5638413 |
Apparatus and method for estimating core performance
The present invention relates to a technique for estimating core performance which includes the steps of: dividing a reactor core into a plurality of core portions, each consisting of at least one...
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5634039 |
Method and management system for controlling, monitoring and regulating complex industrial processes in particular, such as in a nuclear power plant
A method is provided for controlling, monitoring and regulating processes in industrial plants, especially complex industrial processes, such as plant management in failure mode situations in a...
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5631937 |
Method and apparatus for protecting a PWR from departure from nucleate boiling and hot leg boiling
A pressurized water reactor (PWR) is protected from departure from nucleate boiling and from hot leg boiling by generating a segmented delta temperature trip function having a first line segment...
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5623579 |
Automated method for the systematic interpretation of resonance peaks in spectrum data
A method for spectral signature interpretation. The method includes the creation of a mathematical model of a system or process. A neural network training set is then developed based upon the...
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5621776 |
Fault-tolerant reactor protection system
A reactor protection system having four divisions, with quad redundant sensors for each scram parameter providing input to four independent microprocessor-based electronic chassis. Each electronic...
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5617311 |
Information system for operating complex plant
An information system for a complex plant which clearly presents to the operator, in parallel as alarms, abnormal process changes which the operator can, at his discretion, manually respond to...
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5586156 |
Reactor protection system with automatic self-testing and diagnostic
A reactor protection system having four divisions, with quad redundant sensors for each scram parameter providing input to four independent microprocessor-based electronic chassis. Each electronic...
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5581459 |
Plant operation support system
When amounts of operation control variables and/or operation state evaluation variables of a plant are calculated through a multilayered neural network based on data indicating a plant state, and...
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5559691 |
Plant condition display system
A plant condition display system for displaying items of information regarding a plant operation for an operator comprises a process signal input device into which process values are inputted from...
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5555279 |
System for monitoring and controlling nuclear reactors
A computer-based power oscillation detection system and method for detecting, monitoring and indicating thermal-hydraulic stability margin in a nuclear reactor is provided. A group of neutron flux...
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5528639 |
Enhanced transient overpower protection system
An enhanced protection system for protecting against transient overpower in a boiling water nuclear reactor which automatically adjusts the reactor over-power protection trip setpoints to be a...
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5524128 |
Boiling water reactor stability control
A control system for avoiding coupled neutronic-thermal hydraulic instabilities during maneuvering of a boiling water nuclear reactor that determines the average elevation in the reactor core of...
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5524030 |
Multistage control rod drive uncoupling tool
An uncoupling tool has a two-module design: one module being a driver assembly for developing the uncoupling movement and the other module being a probe assembly for verifying the uncoupled...
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5519740 |
Reactor control having transient mitigation system
A transient mitigation system and method of operation is provided for a nuclear reactor having a reactor core. A plurality of monitors monitor operation of the reactor. A plurality of independent...
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5517537 |
Integrated acoustic leak detection beamforming system
A system for mapping absolute acoustic noise intensity in a three-dimensional acoustic noise field, and using three-dimensional absolute noise intensities to infer operational or performance...
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5490184 |
Method and a system for accurately calculating PWR power from excore detector currents corrected for changes in 3-D power distribution and coolant density
Excore detector measurements are used to generate on-line absolute reactor power in a pressurized water reactor (PWR) by calibrating detector current measurements to the reactor thermal power...
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5485491 |
Online diagnostic system for rotating electrical apparatus
An online system for diagnosing operability of a rotating electrical apparatus includes sensors producing electrical variables corresponding to operating conditions of the apparatus, data...
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5481575 |
Method and a device for detecting core oscillations in a nuclear reactor
A method and a device for detecting oscillations in the core of a boiling-water nuclear reactor (BWR) comprising a plurality of neutron detectors, wherein instability is detected based on...
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