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7634043 Protection systems for and methods of operating nuclear boiling water reactors  
A protection system for a BWR may include a power-dependent high reactor pressure setpoint. The high reactor pressure setpoint that corresponds to at least one value of percent power in an...
7596198 Over temperature and over power delta temperature operating margin recovery method and reactor system employing the same  
A method is provided for recovering operating margin in a nuclear reactor. The reactor includes a steam generator, a Reactor Coolant System (RCS) having a hot leg with a temperature, T hot , and a...
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...
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,...
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...
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...
6873671 Reactor manual control system  
In a boiling water reactor controlling each control rod hydraulically by driving a solenoid valve, the control system comprises an operation control means 41 having a duplicated data processing...
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...
6785692 Systems and methods for coordinating QA events  
A method is provided for coordinating QA event schedules using a network-based system. The system includes a server system coupled to a database and at least one client system. The method includes...
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...
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...
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...
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...
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...
6484126 Digital plant protection system with engineered safety features component control system  
A system and method for interfacing with a nuclear power plant's digital plant protection system activates emergency response devices when necessary. Two redundant bistable processors in each of...
6473479 Dual optical communication network for class 1E reactor protection systems  
A communication network for nuclear plant protection systems includes monitoring and control channels, including a first pair of channels having first and second channels, the first pair of...
6470281 Method and apparatus for measuring a throttle point  
In a process and a device for measuring a throttle point, a fluid under pressure is applied to the throttle point by a pump, at least one operating parameter of the pump is acquired and stored, at...
6405154 Method and apparatus for power electronics health monitoring  
A method for monitoring the health of power electronics includes: providing a switch command to a power electronic device ( 12 ) through a gate driver ( 14 ); measuring a switching time of the...
6339629 System for monitoring power of nuclear reactor  
In a system for monitoring power of a nuclear reactor, a plurality of neutron flux measuring devices are arranged in a reactor core of the nuclear reactor for measuring neutron flux so as to...
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...
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,...
6118837 Method for detecting the dropping of a control element  
A method for detecting the dropping of at least one control element in a reactor core of a power station by delaying signals output by detectors disposed along a fall path of the control element in...
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...
6016465 Sensor fault detection system  
The sensor fault detector is one in which each sensor signal is compared with a reference signal provided by e.g. a model of the system being monitored. Prior art sensor fault detectors subtract...
5818892 System and method for controlling control rods of a nuclear power plant  
A system for controlling control rods which can be moved into and out of a reactor core of a nuclear power plant, includes a selector device, a monitor device and a rod control device. The selector...
5787138 Supervision of a neutron detector in a nuclear reactor  
A method of monitoring neutron flex detectors in a nuclear reactor in a neural network is provided. The network comprises an input layer which receives a number of input signals corresponding to...
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...
5610957 Reactor core coolant flow rate control system for a BWR type nuclear power plant  
A reactor core coolant flow rate control system for a BWR type nuclear power plant in which electric power is generated by a turbine-driven generator driven by a steam turbine rotating under the...
5581586 Drive device for control rod drive mechanisms  
In a drive device of control rod drive mechanisms, a large number of control rod drive mechanisms are divided into a plurality of groups, and there are provided, for each group, a control rod...
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...
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...
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...
5511223 Diverse processor electronic protection and control module  
A digital electronic module arrangement includes a module rack carrying a plurality of individual modules which can each be plugged into the rack. A test rack is connected to the module for...
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...
5442555 Combined expert system/neural networks method for process fault diagnosis  
A two-level hierarchical approach for process fault diagnosis is an operating system employs a function-oriented approach at a first level and a component characteristic-oriented approach at a...
5410492 Processing data base information having nonwhite noise  
A method and system for processing a set of data from an industrial process and/or a sensor. The method and system can include processing data from either real or calculated data related to an...
5392320 Core automated monitoring system  
An automated monitoring system and method of operation is provided for a nuclear reactor having a pressure vessel containing a reactor core for boiling water to generate steam. A plurality of...
5386441 Fault tolerant signal validation for feedwater control system  
In a nuclear reactor the feedwater control system receives steam generator water level signals, including information to determine signal quality. The signal quality and additional signal...
5311562 Plant maintenance with predictive diagnostics  
An integrated information system is provided for a plant with interactive processes running in functional equipment subsets, such as a nuclear power generation plant. Sensors are operatively...
5287264 Multicontroller apparatus, multicontroller system, nuclear reactor protection system, inverter control system and diagnostic device  
A multicontroller apparatus has a plurality of control units each including a controller and a diagnostic device for making a diagnosis of the controller. Each diagnostic device includes an...
5267276 Neutron transport analysis for nuclear reactor design  
Replacing regular mesh-dependent ray tracing modules in a collision/transfer probability (CTP) code with a ray tracing module based upon combinatorial geometry of a modified geometrical module...
5223207 Expert system for online surveillance of nuclear reactor coolant pumps  
An expert system for online surveillance of nuclear reactor coolant pumps. This system provides a means for early detection of pump or sensor degradation. Degradation is determined through the use...
5192493 Median signal selector for feedwater control systems  
A system for improving the performance of nuclear power plant feedwater control systems and simplifying steam generator low water level reactor protection logic includes a plurality of water level...
5169592 Method of protecting a nuclear reactor in the event of a load increase  
An emergency stop of a pressurized water reactor to be protected is triggered when the nuclear power (ET) thereof reaches an emergency stop limit (LP). The value of this limit is lower with lower...
5118461 Flow rate measuring apparatus  
In an apparatus including a fluid circulation unit for allowing a fluid in a container to be circulated along a passage in the container, a flow rate measuring apparatus includes a rotational speed...
5095418 Multiplex control system  
A multiplex control system has a plurality of control apparatuses, test signal generators provided, respectively, for the control apparatuses for the purpose of internal diagnosis thereof, signal...
5068080 Operation state responsive automatic display selection system  
The present invention is a computer based system supporting plant operators in caring out nearly routine operations. The computer based system monitors available plant instrumentation signals and...
5059382 Method of renovating the control system for controlling control clusters in a nuclear reactor, and a corresponding control system  
Control clusters, each of which comprises a plurality of neutron-absorbing rods, are operable by means of electromagnetic mechanisms whose coils are powered by power bridges driven from a control...
5023045 Plant malfunction diagnostic method  
A plant malfunction diagnostic method is characterized by determining by simulation a change in a plant state variable, forming a pattern among plant state variables obtained by autoregressive...
5011649 Calibration of rod position indicators  
The rod position indicator system of a pressurized nuclear reactor can be calibrated for one or more control rods without shutdown of the reactor. The procedure involves lowering reactor power to a...
Matches 1 - 50 out of 157 1 2 3 4 >