Primary manway cover removal

Details Primary manway cover removal Primary manway cover removal

1981-10-29

1983-08-16

Hall, George T.

Receptacles

Closures

Having means for securing or retaining closure in its closed...

220336, B65D 4500

Patent

active

043986498

ABSTRACT:
A method and apparatus for removing and replacing the primary manway cover (18) which is secured to the shell (10) of a nuclear steam generator by a multiplicity of nuts (24) and studs (22), including the steps of removing two of the studs and replacing them with two overlength special studs (30); removing the nuts (24) from all of the other studs (22); unthreading the nuts (24) on the overlength studs (30) until the cover (18) is positioned outside the ends (28) of the other studs (22); attaching (44) a cable (40) to the periphery of the cover; removing one of the overlength studs (30); and pivoting the cover (18) on the other of the overlength studs (30) out of alignment with the manway opening while supporting it by means of the cable (40).

REFERENCES:
patent: 3385469 (1968-05-01), Gaines
patent: 3460710 (1969-08-01), Vogeli
patent: 4248714 (1981-02-01), Acosta

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