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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...
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7574337 |
Method of determining a fresh fuel bundle design for a core of a nuclear reactor
A method for determining a fresh fuel bundle design for a core of a nuclear reactor may include defining a plurality of inputs including user-defined target conditions for evaluating one or more...
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7437200 |
Software based control system for nuclear reactor standby liquid control (SLC) logic processor
A method and system is provided for a nuclear reactor safety related application. The method includes executing two forms of a same application-specific logic, one of the two forms implemented as...
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7386086 |
Printed circuit card
A nuclear reactor plant protection system printed circuit card comprises a first logic device having a number of basic logic circuits, and a second logic device operatively connected with the first...
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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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6894662 |
Photoelectric switch
A multifunctional photoelectric switch comprises a display section for displaying a first display information and a second display information. The first display information includes a plurality of...
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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...
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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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6710776 |
Position finder, measuring apparatus with position finder, and measuring system
A picture of a plan view of an area is displayed on a screen of a base unit of a measuring apparatus. The picture contains symbols for respective traps disposed in the displayed area. A bar code is...
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6680686 |
Remote ionizing radiation detector
A method and apparatus for the detection of radioactive material in an area is disclosed. The apparatus comprises a transmitter operatively arranged to transmit electromagnetic radiation, a...
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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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6650722 |
Hydraulic control unit transponder card
A transponder card for a nuclear reactor control rod drive control system is provided. The control system includes a control processor and a plurality of electrical devices operationally coupled to...
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6636577 |
Laser induced fluorescence water measurement system for nuclear reactors
A water monitoring system for a nuclear reactor is provided. In an exemplary embodiment, the water monitoring system includes a fiber optic cable having a first end and a second end, with the first...
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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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6606367 |
Device for measuring the drop time of control rods into the core of a nuclear reactor
The measurement device comprises a real-time measurement-signal acquisition module ( 25 ) and means ( 23, 24 ) for connecting the cables for picking up the voltage from electrical windings for...
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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...
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6583618 |
Remote magnetic field material analyzer and method
The present invention provides an apparatus and method for measuring nonferrous electrical resistance measurement. The method includes providing a nonferrous material, inducing a magnetic field on...
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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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6526114 |
Remote automated nuclear reactor jet pump diffuser inspection tool
An inspection apparatus for inspecting welds in a nuclear reactor jet pump includes a probe subassembly rotatably and linearly movably coupled to a frame structure configured to attach to a top...
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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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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...
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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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6421405 |
Monitoring control rod element assembly position
Compliance with administrative limits on cumulative exposure of control rod groups in the reactor core, is monitored by computing the incremental effective exposure for each group commensurate with...
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6404835 |
Nuclear reactor rod drop time testing method
A method for measuring the drop time of a rod in nuclear reactor with the rod position indication system coils remaining energized. The signal generated at the coils includes both the rod drop...
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6353650 |
Reduced in-core instrument patterns for pressurized water reactors
A method for determining a reduced ICI patterns is provided to achieve core monitoring and surveillance and other required functions using fewer ICIs. Candidate ICI patterns having a reduced number...
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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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6236699 |
Method and system for monitoring control rod element assembly position
Compliance with administrative limits on cumulative exposure of control rod groups in the reactor core, is monitored by computing the incremental effective exposure for each group commensurate with...
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6219398 |
Heated junction thermocouple cable arrangement
An improved heated junction thermocouple cable arrangement for use with a nuclear reactor heated junction thermocouple having sensors with an unheated thermocouple, a heated thermocouple, and a...
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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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6181761 |
Apparatus and method of monitoring reactor power of reactor at the time of startup thereof
The reactor start-up monitoring apparatus is provided with an SRNM detector, an analog amplifier, an N/D converter, a pulse measurement system, a Campbell measurement system and reactor power...
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6173026 |
System for monitoring reactor instability and controlling reactor suppression
A power oscillation monitoring system and method for indicating instability of a nuclear reactor. The monitoring system facilitates monitoring reactor instability and maintaining a nuclear reactor...
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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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6091790 |
Control element assembly position system
Compliance with administrative limits on cumulative exposure of control rod groups in the reactor core, is monitored by computing the incremental effective exposure for each group commensurate with...
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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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6038277 |
Plant operation apparatus
A plant operation apparatus for satisfying a separation criteria includes an operation panel, an operation display screen control device for controlling a display on the operation panel and a touch...
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6011467 |
Sensing device and display method therein
A received light level is displayed by a plurality of LEDs of a received light level display device like a bar graph. A set threshold value is indicated by a plurality of LEDs of a threshold value...
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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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5963610 |
CEDM data acquisition system
A CEDM data acquisition system (40) receives analog coil-current signals from control element drive mechanism coils (18, 20); conditions the analog signals to remove noise induced therein by the...
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5930317 |
Power range monitor system for nuclear reactor
A power range monitor apparatus includes a plurality of average power range monitors for calculating/monitoring local power values, average reactor power values, and core flow rate values, a...
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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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5887041 |
Nuclear power plant component identification and verification system and method
An automated system for identifying nuclear power plant components includes a camera which provides an input signal from an image of the nuclear power plant components. A digitizer generates a...
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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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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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5817958 |
Plant monitoring and diagnosing method and system, as well as plant equipped with the system
Plant operating conditions 1, apparatus operating conditions 2 and environment conditions 3 are accumulated, combined and put together as a set of plant status variables 8 through a monitor 6,...
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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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5790618 |
Method and system for determining the impact of a mislocated nuclear fuel bundle loading
A method and system for identifying the maximum adverse impact of a mislocated nuclear fuel bundle placement in an nuclear core loading arrangement is presented. The method generally has an...
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