Ibaraki, Japan

GE Hitachi Nuclear Energy is a provider of advanced reactors and nuclear services. It is located in Wilmington, N.C.. Established in June 2007, GEH is a global nuclear alliance created by General Electric and Hitachi. In Japan, the alliance is Hitachi-GE Nuclear Energy, Ltd. Wikipedia.


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Patent
Hitachi - GE Nuclear Energy | Date: 2017-01-11

Chimneys include several combinable parts useable in nuclear reactors. The parts are modular and removably joinable without destruction for use in directing flow in an operating nuclear reactor and directly fit in storage area during non-operation. Chimney parts are joinable through flanges and connecting structures. Chimney parts may include partitions that divide or direct energetic coolant flow from a nuclear core as well as steam separating and drying structures. The parts each individually fit within storage areas of the nuclear plant, including equipment or buffer pools in the refueling floor of the plant. Methods move the chimney parts between the reactor and storage areas, and multiple parts may be stacked or nested in such moves. Methods are useable underwater and with storage pools to prevent exposure of chimney parts during an outage. During operation, chimneys are useable in place of existing single-piece chimneys.


Patent
Hitachi - GE Nuclear Energy | Date: 2015-10-16

A passive fire response system is configured to suppress a metallic fire. The system includes a reservoir containing an ionic liquid, at least one outlet in communication with the reservoir, a valve arranged between the reservoir and the outlet, a sensor configured to sense at least one of a hydrogen concentration and a temperature and/or heat, and a controller configured to open the valve and release the ionic liquid if an output from the sensor indicates that the at least one of the hydrogen concentration and the temperature equals or exceeds at least one of a threshold hydrogen concentration and a threshold temperature.


An insulated solution injector may include an outer tube and an inner tube arranged within the outer tube. The outer tube and the inner tube may define an annular space therebetween, and the inner tube may define a solution space within. The annular space may be configured so as to insulate the solution within the solution space. As a result, the solution may be kept to a temperature below its decomposition temperature prior to injection. Accordingly, the decomposition of the solution and the resulting deposition of its constituents within the solution space may be reduced or prevented, thereby decreasing or precluding the occurrence of a blockage.


Patent
Hitachi - GE Nuclear Energy | Date: 2015-11-16

Safety valves accurately control closure and opening of fluid passage through the valve. Valves include a barrier that blocks the fluid until removal only by a high-energy projectile. Following removal and opening, the barrier or the projectile can flow through the valve, which remains open. Bullets, pneumatic pistons, shot, coilgun pellets and any other forceful projectile may impact and remove the barrier. The projectile is actuated with any type of chemical reaction, firing pin, spring release, accelerating circuit, ignition circuit. Catchers in the valve envelop or otherwise retain the projectile or barrier pieces and enter the fluid flow of the opened valve without blocking it. Disruptable barriers include strong but breakable glass plates, thin steel sheets, a rotatable door and other barriers that can withstand potentially over 10,000 psi of fluid pressure while closing the valve. Valves can use circuits to both monitor valve open/closed status and initiate firing the projectile.


Patent
Hitachi - GE Nuclear Energy | Date: 2015-11-16

Seals are positioned between abutting nuclear reactor components. Example seals are held in position by gravity, grooves, retainers, direct joining, or other mating structures to seal the abutting components. Compression of example seals drives the seals against the joining components, preventing fluid passage therebetween. Example seals may include a cavity opening to a higher pressure fluid outside the joined components to drive expansion or sealing of the seal. Seals may have a C-shaped, E-shaped, O-ring, coiled, helical, or other cross-section to provide such a cavity. Example seals may be flexible materials compatible with radiation and heat encountered in a nuclear reactor. Seals may be continuous or sectional about the abutment of the components. An annular seal may extend continuously around a perimeter of removably joined core plates, supports, shrouds, and/or chimney heads and structures. Seals can be installed between and in the components at any time access is available to the components.


Patent
Hitachi - GE Nuclear Energy | Date: 2015-11-16

Devices position inspection and operation tools in a nuclear reactor without use of a bridge or other refueling structure well above the reactor core. Devices can selectively join to in-reactor structures like steam dams through clamping that permits limited movement. Clamps can include one or more rollers that allow for controlled, accurate positioning of the devices relative to the structures. Devices include an extension to which the tools can be affixed. Through selective disengagement of joining structures, devices can move over obstacles on the mounting structure. Devices further include controls so that operators positioned outside the reactor can move the device while mounted on a static structure. The controls can further move the inspection tool in other directions with the extension. Devices are useable underwater or submerged in other fluid and may include powering lines or mechanical extensions that permit powering or direct interfacing from operators outside the reactor.


Patent
Hitachi - GE Nuclear Energy | Date: 2017-05-17

Seals 250, 250a, 250b are positioned between abutting nuclear reactor components 102, 118, 120. Example seals 250, 250a, 250b are held in position by gravity, grooves 102a, 102b, retainers 415, direct joining, or other mating structures to seal the abutting components. Compression of example seals 250, 250a, 250b drives the seals 250, 250a, 250b against the joining components, preventing fluid passage therebetween. Example seals 250, 250a, 250b may include a cavity opening 252 to a higher pressure fluid outside the joined components to drive expansion or sealing of the seal. Seals 250, 250a, 250b may have a C-shaped, E-shaped, O-ring, coiled, helical, or other cross-section to provide such a cavity. Example seals 250, 250a, 250b may be flexible materials compatible with radiation and heat encountered in a nuclear reactor. Seals 250, 250a, 250b may be continuous or sectional about the abutment of the components. An annular seal 250b may extend continuously around a perimeter of removably joined core plates, supports 102, shrouds 114, and/or chimney heads 122 and structures. Seals can be installed between and in the components at any time access is available to the components.


Patent
Hitachi - GE Nuclear Energy | Date: 2017-05-17

Devices 100 position inspection and operation tools in a nuclear reactor without use of a bridge or other refueling structure well above the reactor core. Devices 100 can selectively join to in-reactor structures like steam dams 15 through clamping that permits limited movement. Clamps 110 can include one or more rollers 150, 161, 162 that allow for controlled, accurate positioning of the devices 100 relative to the structures. Devices 100 include an extension 190 to which the tools can be affixed. Through selective disengagement of joining structures, devices 100 can move over obstacles on the mounting structure. Devices 100 further include controls 180 so that operators positioned outside the reactor can move the device 100 while mounted on a static structure. The controls 180 can further move the inspection tool in other directions with the extension 190. Devices 100 are useable underwater or submerged in other fluid and may include powering lines or mechanical extensions 180 that permit powering or direct interfacing from operators outside the reactor.


Patent
Hitachi - GE Nuclear Energy | Date: 2017-05-31

Chirp waves generated in a transmitting/receiving unit is supplied to ultrasonic sensors (101-1, ..., 101-12). Signals output from the ultrasonic sensors (101-1, ..., 101-12) are supplied to the transmitting/receiving unit and summed in a signal processing/recording unit. The signal processing/recording unit performs mutual correlation processing between the summed signals and the chirp waves and calculates a peak generation time difference. Necessity of exchanging a pipe is determined by calculating and recording the thickness of a pipe from the calculated time difference and calculating a difference between thicknesses measured in the past and the present.


Patent
Hitachi - GE Nuclear Energy | Date: 2016-11-23

Chirp waves generated in a transmitting/receiving unit is supplied to ultrasonic sensors. Signals output from the ultrasonic sensors are supplied to the transmitting/receiving unit and summed in a signal processing/recording unit. The signal processing/recording unit performs mutual correlation processing between the summed signals and the chirp waves and calculates a peak generation time difference. Necessity of exchanging a pipe is determined by calculating and recording the thickness of a pipe from the calculated time difference and calculating a difference between thicknesses measured in the past and the present.

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