Core instrument cutting system

Details Core instrument cutting system Core instrument cutting system

1991-11-07

1993-07-13

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

83930, G21C 1900

Patent

active

052271234

ABSTRACT:
A method of removing in-core instruments and dry tubes from a boiling water reactor during a refueling outage wherein a pair of temporary storage containers are provided in the reactor core. A remotely operated cutting device is superposed on the first temporary storage container. An instrument is suspended by an end, with the in-core part uppermost, and lowered until a portion of the out-of-core part is within the first temporary storage container. The cutting device is then operated to sever the instrument portion within the temporary storage container. The instrument is repeatedly lowered, and portions severed, until all of the out-of-core part of the instrument is in the first temporary container. The in-core part of the instrument is then lowered into the second temporary container and the two temporary containers are removed from the reactor cavity using the existing equipment-handling crane.

REFERENCES:
patent: 4223581 (1980-09-01), Markiewicz
patent: 4377551 (1983-03-01), Adams
patent: 4664872 (1987-05-01), Kiewitz et al.

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