Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Toshiba Plant Systems & Services Corporation

Kunihiko Kinugasa

Hiroyuki Adachi

Jun Suzuki

Akira Ito

Masanobu Watanabe

Satoshi Yamamoto

Hajime Mori

Yuki Minato

Toshihiro Yasuda

Kiyohiko Kitagawa

Kazutaka Maeta

Shigeru Kasai

Tadahiro Mitsuhashi

Haruhiko Hata

Tsuyoshi Hagiwara

Yoshiharu Kanai

Hideo Kobayashi

Yujiro Tajima

Masakazu Abura

Yasushi Kanazawa

Kiyofumi Saiki

Kozue Matsukawa

Hiromasa Itou

Noboru Saito

Masato Okamura

Yoshifumi Nagamoto

Yuusuke Watanabe

Yasuo Morishima

Kazuo Sudo

Kenji Yamazaki

Akio Sayano

Yasuhiro Sakai

Takeshi Maehara

Masaru Ukai

Tsutomu Shioyama

Yoshinori Katayama

Tetsuji Kaneko

Tomoyuki Nonaka

Norihisa Saito

Yuuji Takiguchi

Yuichi Motora

Hiromasa Itoh

Ken Okuda

Masahiko Warashina

Tomoki Fujita

Takeshi Takeuchi

Yusuke Ozawa

Yoshiki Ishizaki

Yukiaki Hidaka

Hideshi Iwasa

Satoshi Miyamura

Daiki Takeyama

A charged particle accelerator and a method for building the same includes in a vacuum-duct joint-portion, a male screwengraved on an outer peripheral surface of a joint, a contact surfaceto be brought into contact with an annular sealis formed at the end of the inner peripheral surfaceof the joint, a pressing surfacefor pressing the annular sealtoward the contact surfaceof the jointA is formed on the ring, an abutting surfacethat abuts on the ringis formed on the nut, and a female screwto be screwed to the male screwof the jointA is engraved on the inner peripheral surface of the nut

Charged particle accelerator and method for building charged particle accelerator

A charged particle acceleration device, which eliminates the need for repeating alignment adjustment even in the case of repeating installation of the controllers, is provided, and a method for adjusting the same is provided. A charged particle acceleration deviceA includes: controllersconfigured to control a beam trajectoryof charged particles that pass through a ductto be inserted through the controllers; and a stagethat is supported by a framefixed to a base and reversibly moves the controllersin a direction of intersecting the beam trajectory

Charged particle acceleration device and method for adjusting charged particle acceleration device

A charged particle transport system and its installation method, both of which can readily and quickly adjust alignment, are provided. The charged particle transport systemincludes: a framefixed to a base; a first platejoined to an upper portion of the framewith a height-adjustable first screw; a second platemovably accommodated in a horizontal surface of the first plate; a second screwscrewed into a screw hole formed in a fixing memberaround the first platesuch that its tip abuts on an outer peripheral surface of the second plate; a third screwthat fixes the second plateto the first plate; and first engagement pinsinserted into respective engagement holesformed in the second plateand a supporting memberfor engaging both.

Charged particle transport system and installation method therefor

A particle beam treatment apparatus includes: a rotating gantry configured to axially rotate in a state where a bed fixed to a stationary system is disposed inside the rotating gantry and an irradiation port of a beam is fixed to a body of the rotating gantry; a tunnel structure configured to have at least a horizontal floor surface and have an internal space in which at least a part of the bed is accommodated; and a rotation supporter configured to cause the tunnel structure to be stationary in the stationary system independently of axis rotation of the rotating gantry by rotationally displacing the tunnel structure with respect to an inner side surface of the rotating gantry.

Particle beam treatment apparatus

A particle beam treatment apparatus includes: a gantry configured to axially rotate in a state where an irradiation port for a beam is fixed to a body of the rotating gantry; a moving floor that is provided inside the gantry, is configured by annually connecting a plurality of plates with each other in a freely bendable manner, accommodates at least a part of a bed fixed from a stationary system, and rotates together with the gantry in a state of causing the irradiation port to penetrate the moving floor; a cable configured to be connected to a device fixed to the moving floor and be wired to outside of the gantry in a state of passing through the gantry; and an adjuster configured to adjust length of the cable wired inside the gantry when the gantry axially rotates.

Particle beam treatment apparatus with cable length adjuster

A jet pump measuring pipe repair method that repairs a ruptured part of a measuring pipe horizontally installed to a lower portion of a jet pump provided in reactor water inside a reactor pressure vessel. The repair method includes: fixing a support member to the jet pump near the measuring pipe left remained; mounting, after the support member fixing, a measuring pipe connector provided with a pipe-repairing pipe having both ends over which connecting pipes are fitted, respectively, to the support member; connecting, after the connector mounting, the remaining measuring pipe and connecting pipe using the measuring pipe connector.

Method of repairing jet pump measuring pipe and repair device therefor

An apparatus for reinforcing a jet pump riser includes: an elbow upper clamp for covering a riser elbow coupled to a thermal sleeve from an upper side thereof; an elbow lower clamping member for clamping the riser elbow from a lower side thereof; an elbow vertical portion clamping member for covering a vertical portion of the riser elbow; and an elbow horizontal portion clamping member for covering a horizontal portion of the riser elbow. These members are disposed in different orientations with respect to the elbow upper clamp so as to fix the thermal sleeve, the riser elbow and the riser pipe.

Apparatus and method for reinforcing jet pump riser

A coating of niobium oxide, zirconium titanate, or nickel titanate is formed on at least a part of a surface of a jet pump member constituting a jet pump serving as a reactor internal structure of a boiling water reactor. Further, a solution containing, e.g., a niobium compound is applied to at least a part of the surface of the jet pump member constituting the jet pump, and the jet pump member coated with the solution is heat-treated to form a coating of, e.g., niobium oxide. With this configuration, the jet pump member constituting the jet pump of the boiling water reactor is provided such that deposition of crud can be sufficiently suppressed on the jet pump member.

Reactor internal structure and method of manufacturing the same

A reactor measurement-pipe maintenance clamp apparatus includes a first clamp mechanism and a second clamp mechanism. The first clamp mechanism includes clamps to fix the measurement pipe between the clamps, first clamp operation bolts that are allowed to be turned by remote control from above a reactor core, and wedge mechanisms to convert the turning of the clamp operation bolts to displacement of the clamps in a radial direction of the diffuser to generate clamping forces for securing the measurement pipe. The second clamp mechanism includes a support clamp to hold the support, a second clamp operation bolt that is allowed to be turned by remote control from above the reactor core, and a wedge mechanism to convert the turning of the second clamp operation bolt to displacement of the support clamp in a tangential direction of the diffuser to generate clamping force for fixing the support.

Reactor measurement-pipe maintenance clamp apparatus

A bolt fixing device is configured so that a lock cap is pushed up by elastic force of an elastic member and engages upper surface teeth with lower surface teeth, the upper surface teeth being formed on the upper surface of a flange of a lock cap, the lower surface teeth being formed on the lower surface of an engagement flange of a body housing. Thus, the head bolt of a jet pump beam is fixed. With the configuration, when installing an inlet mixer, the head bolt of the jet pump beam is simply and reliably locked against rotation.

Jet pump and bolt fixing device of jet pump beam

In a jet pump measurement pipe repair method according to the present embodiment, a breakage part of a measurement pipe horizontally fixed to a lower part of a jet pump provided in reactor water in a reactor pressure vessel is repaired. The method has: a step of cutting and removing the measurement pipe including the breakage part; a step of retaining a connection pipe for connecting the remaining measurement pipe on the jet pump by means of a clamp; and a step of connecting ends of the remaining measurement pipe by means of the connection pipe.

Jet pump measurement pipe repair method

A jet pump including a riser as a coolant supply tube, an inlet mixer forming a turn-around path for the coolant, a diffuser, and a jet pump beam provided with a bolt fixing device is disclosed. The bolt fixing device includes: a head bolt of a jet pump beam for pushing and supporting the inlet mixer from an upper side of the riser, the head bolt being provided with a polygonal head portion; a lock cap provided on the polygonal head portion of the head bolt; a body housing disposed on an upper surface of the jet pump beam and adapted to accommodate the lock pin; a plurality of tapered external teeth formed on an outer peripheral side surface of the lock cap; and a plurality of internal tooth-shaped grooves formed to the body housing to fix the head bolt of the jet pump beam.

Bolt fixing device of jet pump beam

A jet pump which can restrain self-excited vibration in a connection portion between an inlet mixer pipe and a diffuser pipe without inhibiting a structural deformation due to thermal expansion and the like includes a slip joint structure connecting the inlet mixer pipe and the diffuser pipe to each other by inserting the inlet mixer pipe into an upper end opening of the diffuser pipe with a clearance left therebetween; and a self vibration damping structure configured such that when the clearance defined by an outer pipe wall of the inlet mixer pipe and an inner pipe wall of the diffuser pipe is widening or narrowing due to vibration of the inlet mixer pipe or the diffuser pipe, a flow path resistance inside a clearance flow path for pumped coolant water defined by the clearance is not smaller than a fluid inertia force all over the clearance flow path.

Jet pump and method for restraining vibration of the same

A retainer provided at lower portion of a pump beam of a jet pump for circulating cooling water to a reactor core or a bolt for fastening the retainer is cut through an underwater-remote control to remove the bolt and the retainer is removed through the underwater-remote control.

Method of removing retainer of jet pump and jet pump

Growing community of inventors

Yokohama, Japan

Kunihiko Kinugasa