Abstract: A nozzle repair method and a nuclear reactor vessel include: removing a trepanning portion (208) as a connection portion with respect to an in-core instrumentation cylinder (204) in a groove-welding portion (206); removing the in-core instrumentation cylinder (204) from a lower end plate (66); forming a plug attachment opening (211) by removing the groove-welding portion (206); applying a pressing load to the lower end plate (66) by attaching a plug (212) to the plug attachment opening (211); and welding and fixing the plug (212) attached to the plug attachment opening (211). Accordingly, since a repair is easily performed, it is possible to improve the workability and to decrease a repair cost.

Abstract: A nozzle repair method and a nuclear reactor vessel include: removing a trepanning portion (208) as a connection portion with respect to an in-core instrumentation cylinder (204) in a groove-welding portion (206); removing the in-core instrumentation cylinder (204) from a semi-spherical portion (66) as a lower end plate; forming a surface buttered-welding portion (210) by buttered-welding the surface of the groove-welding portion (206); forming a welding groove (212) by grooving the surface buttered-welding portion (210); inserting a new in-core instrumentation cylinder (204A) provided with a circumferential groove portion (204f) outside an instrumentation equipment guide passage (204d) into an attachment hole (203); and fixing the new in-core instrumentation cylinder (204A) by groove-welding the welding groove (212). Accordingly, since the nozzle welding area is suppressed to a predetermined range, the workability of the repair is improved.

Abstract: A nozzle repair method and a nuclear reactor vessel include: removing a trepanning portion (208) as a connection portion with respect to an in-core instrumentation cylinder (204) in a groove-welding portion (206); removing the in-core instrumentation cylinder (204) from a lower end plate (66); forming a plug attachment opening (211) by removing the groove-welding portion (206); applying a pressing load to the lower end plate (66) by attaching a plug (212) to the plug attachment opening (211); and welding and fixing the plug (212) attached to the plug attachment opening (211). Accordingly, since a repair is easily performed, it is possible to improve the workability and to decrease a repair cost.

Abstract: A nozzle repair method and a nuclear reactor vessel include: removing a trepanning portion (208) as a connection portion with respect to an in-core instrumentation cylinder (204) in a groove-welding portion (206); removing the in-core instrumentation cylinder (204) from a semi-spherical portion (66) as a lower end plate; forming a surface buttered-welding portion (210) by buttered-welding the surface of the groove-welding portion (206); forming a welding groove (212) by grooving the surface buttered-welding portion (210); inserting a new in-core instrumentation cylinder (204A) provided with a circumferential groove portion (204f) outside an instrumentation equipment guide passage (204d) into an attachment hole (203); and fixing the new in-core instrumentation cylinder (204A) by groove-welding the welding groove (212). Accordingly, since the nozzle welding area is suppressed to a predetermined range, the workability of the repair is improved.

Abstract: Atmospheric conditions can be efficiently formed within a cavity, and as a result improvements in the operation efficiency within the cavity can be achieved. The operation method is an operation including: a step for detaching a cover in an underwater environment; a step for arranging a fuel rod housing having an upper aperture, in an underwater environment; a step for inserting fuel rods into the fuel rod housing; a step for closing the upper aperture of the fuel rod housing such that it is water-tight; a step for draining water of the cavity; and a step for executing a repair operation on a flange seat surface of a connection part between a container body and the cover in an atmospheric environment.

Abstract: A member management system including a characteristic of “ASP member management” which can group member information according to attributes of services provided by the ASP, which are the highest-level attributes, and member contract information keys which are held by the ASP for all members based on common rules. Then, a table can be prepared for storing attributes of services provided by the ASP, and attributes of a billing group unit and a service utilization condition, in association with the member contract information keys, such that the most basic information required for particular processing is extracted at each occasion for executing the processing.

Abstract: A multimedia information transfer system includes a multimedia server and a client server system coupled with the multimedia server through a communication network and transfers data transmitted from the multimedia server to a server of the client server system. The multimedia server stores data streams of the multimedia information and reproduces the information. The client requests the multimedia server to transfer data, stores the transferred data block and displays the stored data block concurrently with the storage of the next coming data block.

Abstract: A rewriting program is transferred from a main control apparatus to a terminal control apparatus and the terminal control apparatus executes the rewriting program. The rewriting program receives a new control program from the main control apparatus and rewrites a control program with a received new control program. This makes it possible to easily and reliably rewrite the control program even if a specification of the control program is changed.

Abstract: A rewriting program is transferred from a main control apparatus to a terminal control apparatus and the terminal control apparatus executes the rewriting program. The rewriting program receives a new control program from the main control apparatus and rewrites a control program with a received new control program. This makes it possible to easily and reliably rewrite the control program even if a specification of the control program is changed.

Abstract: A multimedia information transfer system includes a multimedia server and a client server system coupled with the multimedia server through a communication network and transfers data transmitted from the multimedia server to a server of the client server system. The multimedia server stores data streams of the multimedia information and reproduces the information. The client requests the multimedia server to transfer data, stores the transferred data block and displays the stored data block concurrently with the storage of the next coming data block.