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Class 376/218 - Xenon control


Subclass of Class 376 - Induced nuclear reactions: processes, systems, and elements
Definition: Subject matter wherein an operating program is developed
No. of patents: 14
Last issue date: 04/22/2003


NumberTitleIssue Date
6553090Control 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
6477218Control 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
5032346Method of determining and evaluating the emergency shutdown margin for a pressurized water nuclear reactor
The emergency shutdown margin is determined and evaluated by calculating a shutdown margin with the general formula Mar=ƊPg+ƊPp-ƊPr, where Mar is the shutdown margin being sought, ƊPg is the negative reactivity attributed to the full set of the reactor's c...
07/16/1991
5024801Reactor core model update system
The present invention is a system that updates a pressurized water reactor core model, or data file describing the core, periodically using measured values determinable from core instrumentation. The system starts with a calibrated model calibrated from a...
06/18/1991
4943408Method and apparatus for operating nuclear electric power generating plants
In a nuclear electric power generating plant connected to an electric power system, an output of a nuclear reactor of the plant is reduced during a nighttime operation, increased to a predetermined level during a daytime operation and reduced during a lun...
07/24/1990
4826647Spectral shift reactor
A mechanical spectral shift reactor comprises apparatus for inserting and withdrawing water displacer elements having differing neutron absorbing capabilities for selectively changing the water-moderator volume in the core thereby changing the reactivity ...
05/02/1989
4642213Anticipatory control of xenon in a pressurized water reactor
Axially spaced measurements of the neutron flux in a pressurized water reactor are used to generate point-by-point signals representative of the core average xenon-135 axial distribution and the rate of change thereof. These signals may be used directly t...
02/10/1987
4582669Xenon suppression in a nuclear fueled electric power generation system
The fissile inventory required in operating a negative power coefficient nuclear reactor in an electric power generating system is reduced by cycling the load imposed on the system when 100% power can no longer be maintained at equilibrium due to xenon po...
04/15/1986
4382059Power change operating method of a boiling water reactor
A power change operating method of a boiling water reactor, in which an operation allowable range is defined by the relation between xenon and iodine concentrations, the present concentrations is compared with the allowable range, and the core flow is con...
05/03/1983
4368171Method of controlling operation of nuclear reactor
A method of operating a nuclear reactor adapted to use cross-shaped control rods. The control rods are grouped into a plurality of groups having a first group consisting of a control rod located at the center of the core, a second group consisting of 8 co...
01/11/1983
4222822Method for operating a nuclear reactor to accommodate load follow while maintaining a substantially constant axial power distribution
This invention provides a method of operating a nuclear reactor having a negative reactivity moderator temperature coefficient with the object of maintaining a uniform and symmetric Xenon distribution above and below substantially the center of the core o...
09/16/1980
4057463Method of operating a nuclear reactor which maintains a substantially constant axial power distribution profile with changes in load
This invention provides a method of operating a nuclear reactor with the object of maintaining a substantially symmetric axial xenon distribution during normal power operation including load follow. Variations in the xenon distribution are controlled by m...
11/08/1977
3984283Reactor
1. A neutronic reactor having a moderator, coolant tubes traversing the moderator from an inlet end to an outlet end, bodies of material fissionable by neutrons of thermal energy disposed within the coolant tubes, and means for circulating water through s...
10/05/1976
3932885System and method for xenon acceleration in training simulator for nuclear power plant
A method and system for the real-time dynamic simulation of a nuclear power plant that includes a control and monitoring console for operating the reactor and monitoring three dimensional physical values, such as nuclear flux, power and temperature throug...
01/13/1976
 
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