Method and apparatus for testing, repairing or exchanging the no

Details Method and apparatus for testing, repairing or exchanging the no Method and apparatus for testing, repairing or exchanging the no

1994-01-19

1996-01-09

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

Leak detection

376254, 376247, 376271, 376287, G21C 1700

Patent

active

054835607

ABSTRACT:
A method and an apparatus for testing, repairing or exchanging nozzles of the bottom of a reactor pressure vessel include inserting individual shielding containers into the reactor pressure vessel. Shafts pass through a shielding container and water-filled cartridges can be inserted into the shafts. Tubes for receiving probes of an in-core instrumentation are embedded into bottom plates of the remaining shielding containers and into bottoms of the cartridges. After removing a cartridge, a carrier for working tools can be introduced into the shaft. In this way the radioactive loading is considerably reduced by the probes inside or outside the reactor pressure vessel.

REFERENCES:
patent: 4313793 (1982-02-01), Klumb et al.
patent: 4664872 (1987-03-01), Kiewitz et al.
patent: 4865801 (1989-09-01), Brahm et al.
patent: 4966747 (1990-10-01), Tower et al.
patent: 4983351 (1991-01-01), Tower et al.
patent: 4986954 (1991-01-01), Feurgard
patent: 5263060 (1993-11-01), Obermeyer
patent: 5305357 (1994-04-01), Ekeroth
Japanese Patent Abstract No. 2-105097 (Kurosawa), dated Apr. 17, 1990 (Abstract Translated).

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