Method and device for replacing an adaptor for penetrating the v

Details Method and device for replacing an adaptor for penetrating the v Method and device for replacing an adaptor for penetrating the v

1994-03-15

1995-07-11

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

2940208, G21C 1300

Patent

active

054328284

ABSTRACT:
The replacement is performed from a repair area located above the convex face (1a) of the head. The adaptor to be replaced is machined, after dismounting its drive mechanism (13) and a thermal sleeve (4), by inserting an appropriate tool (14) via the upper end of the adaptor (3') to be replaced. Machining of the lower portion of the adaptor and of a portion of the weld of this adaptor, the machining of a narrow bevel in the weld of the adaptor to be replaced, reboring of the remaining portion of the adaptor to be replaced (3') inside the head (1), extraction of the adaptor, the installation, by cold shrink-fitting, of a replacement adaptor and the welding of the replacement adaptor are performed in succession.

REFERENCES:
patent: 3240514 (1966-03-01), Bell et al.
patent: 5070600 (1991-12-01), Brew et al.
Kernergie, vol. 15, No. 8, Aug. 1972, p. 267.

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