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: 2015-09-28

Modular flow control systems include several differently-shaped structures to achieve desired flow characteristics in fluid flow. Systems include one or many plates held in desired positions by a retainer within the flow. The plates are uniquely shaped based on their position, or vice versa, to shape flow in a desired manner. The plates may fill an entire flow area or may extend partially throughout the area. Plates can take on any shape and are useable in systems installed in any type of flow conduit. When used in a PCCS upper manifold in a nuclear reactor, a chevron plate directly below the inlet divides flow along the entire upper manifold. Perforated plates allow flow to pass at ends of the PCCS upper manifold. The plates can be installed along a grooved edge during an access period and held in static position by filling the length of the PCCS upper manifold.


Irradiation target holders are configured to fit in open locations inside of an operating commercial nuclear core. Holders can be placed with ends at vertical bottom and top of the core or any position therebetween to directly expose holders to nuclear fuel reactions. Holders have ends and overall shape that can join with existing reactor structures, while fitting closely with fuel and moderator and being easily removable from the same. Holders are fabricated of any reactor-compatible material that will retain irradiation targets and daughter products. Holders securely retain irradiation targets and daughter products of any shape or phase throughout reactor operation. Holders can be installed during reactor outages and irradiated during operation without risk of movement or interference with operation. After a desired period of operation and irradiation, holders can be harvested from the core independent of other core structures and fuel.


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: 2016-06-15

A computing device 105 within a reflective memory system 100 includes a memory block 260 and a special purpose processor 240. The memory block includes a plurality of memory areas 261, which are configured to store data of a corresponding one of a plurality of external devices. The special purpose processor is configured to intercept a write request. The write request is associated with a first external device of the plurality of external devices, and the first external device is associated with a first memory area of the plurality of memory areas. The special purpose processor is configured to determine whether the write request is valid or invalid, write the data of the first external device to the first memory area if the write request is valid, and prevent the data of the first external device from being written to the memory block if the write request is invalid.


Irradiation target holders (100) are configured to fit in open locations inside of an operating commercial nuclear core (35). Holders (100) can be placed with ends at vertical bottom and top of the core (35) or any position therebetween to directly expose holders (100) to nuclear fuel reactions. Holders (100) have ends and overall shape that can join with existing reactor structures, while fitting closely with fuel (45) and moderator and being easily removable from the same. Holders (100) are fabricated of any reactor-compatible material that will retain irradiation targets (151) and daughter products. Holders (100) securely retain irradiation targets (151) and daughter products of any shape or phase throughout reactor operation. Holders (100) can be installed during reactor outages and irradiated during operation without risk of movement or interference with operation. After a desired period of operation and irradiation, holders (100) can be harvested from the core (35) independent of other core structures and fuel (45).


Patent
Hitachi - GE Nuclear Energy | Date: 2016-09-14

Provided is a primary containment vessel including a drain sump for collecting leaking water in the primary containment vessel and capable of maintaining a function of supporting a reactor pressure vessel by protecting a pedestal from heat of a molten fuel falling in a lower drywell at the time of occurrence of a serious accident. The primary containment vessel includes: a sump cover 18a for covering a drain sump 18 from above a floor surface of a lower drywell 5; a floor protection material 12a integrally formed with the sump cover and supported to form a floor surface gap 14a with the floor surface of the lower drywell; a wall protection material 12b integrally formed with the sump cover and erected on an upper surface outer edge portion of the floor protection material to form a wall surface gap 14b with an inner wall surface of a pedestal 9; and a water injection mechanism 15 for injecting cooling water into the floor surface gap and the wall surface gap.


Patent
Hitachi - GE Nuclear Energy | Date: 2016-05-25

To realize an object of providing an eddy current inspection device which is able to control a sensitivity decrease, and is able to reliably detect a defect. An eddy current inspection device of the present invention is provided with an orthogonal detection mode which measures an electromotive force signal using a coil pair which is configured by two coils within the first row coil group, a first intersection detection mode which measures the electromotive force signal using the first coil pair which is configured by the two coils within the first row and second row coil groups that are lined up in a direction which intersects with the scanning direction, and a second intersection detection mode which measures the electromotive force signal using the second coil pair which is configured by the two coils within the first row and second coil groups that are lined up in a direction in which a direction which intersects with the scanning direction is on the same side as the direction through which the first coil pair intersects and has a larger coil pair intersection angle than the coil pair intersection angle of the first coil pair.


Patent
Hitachi - GE Nuclear Energy | Date: 2016-05-26

A control rod drive mechanism (CRD) capable of more securely preventing outflow of water when a scram piping is broken is provided. In a CRD, a ball check valve is provided in a flange provided in a lower end portion of an outer tube. The ball check valve includes a ball, a retainer, and a ball support mechanism, and the retainer has a valve flow channel. The ball support mechanism for supporting the ball is provided in a lower opening portion. A height of an upper end of the ball support mechanism is set so as not to bring the ball into contact with an upper corner portion of the lower opening portion.


Patent
Hitachi - GE Nuclear Energy | Date: 2016-04-14

When a power source is lost after an operation stop of a nuclear power plant, a first open/close valve is opened via a first battery at an early stage and steam in a reactor pressure vessel (RPV) is condensed in a suppression pool. The heat of the water in the suppression pool is transmitted to a cooling water pool located below inner space between first and second reactor containment vessels surrounding the RPV. A second open/close valve is opened via a second battery at the early stage and cooling water in a tank is injected into the RPV. After the early stage, a third open/close valve is opened via a third battery, and a cooling medium becomes steam by an evaporator in the RPV, the steam being condensed by a condenser disposed in the inner space to become a liquid of the cooling medium and is returned to the evaporator.


Patent
Hitachi - GE Nuclear Energy | Date: 2016-09-14

To provide a cooling system of a reactor suppression pool capable of cooling suppression pool water and improving the safety of a reactor in the case where an event surpassing a postulated initiating event occurs, or in the case where cooling of the suppression pool water by a residual heat removable system does not function. A cooling system of a reactor suppression pool according to the present invention includes a heat exchanger for cooling suppression pool water installed in the middle of a suppression pool water cooling line, operating when the temperature of the suppression pool water reaches a given temperature, performing heat exchange with the suppression pool water from a suppression pool water cleanup system suction line to cool the water, and returning the cooled suppression pool water to the suppression pool through a suppression pool water cleanup system discharge line.

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