Automatic pressure vessel servicing apparatus

Details Automatic pressure vessel servicing apparatus Automatic pressure vessel servicing apparatus

1990-11-09

1993-09-28

Walsh, Douglas P.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

81 5738, G21C 1900

Patent

active

052492087

ABSTRACT:
A method and apparatus for positioning stud affecting apparatus comprising: sequentially positioning a plurality of flange cover sectors about the flange of a nuclear pressure vessel; rotating each flange cover sector until the entire flange is covered by said flange cover sectors; moving a caddy containing stud affecting tools including stud tensioners and stud drive tools into a position adjacent a point on the flange of the nuclear reactor pressure vessel; moving apparatus sector vessels containing stud affecting apparatus to a point on the flange of the nuclear pressure vessel and positioning them on a specific flange cover sector; rotating all flange cover sectors to bring another flange cover sector into registration with the caddy; sequentially moving the apparatus sectors onto each flange cover sector by rotating the flange cover sectors; and actuating the stud affecting tools to perform the appropriate function to tension or untension the studs and/or to remove and/or to insert studs into the pressure vessel to enable removal of the dome and servicing of the nuclear pressure vessel.

REFERENCES:
patent: 4266451 (1981-05-01), Boudet et al.
patent: 4548103 (1985-10-01), Orban
patent: 4552038 (1985-11-01), Heiermann et al.

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