Metal working – Means to assemble or disassemble – Nuclear device
Patent
1984-05-29
1986-05-27
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Nuclear device
29235, 29400N, 294261, 294265, 29720, 81 532, 81488, 376260, 376262, 376263, 376264, B23P 1900
Patent
active
045906718
ABSTRACT:
A tool for removing split pin remnants which remain in anchor bores in the upper core plate of a nuclear reactor vessel after removal of guide tube assemblies therefrom, includes an elongated mast having parallel tubular members with handle apparatus at the upper end thereof and carrying at the lower end thereof a ram platform having an upstanding pin removal member. The ram platform is dimensioned to be lowered through any one of the guide tube seating apertures in the upper core plate. A locating plate mounted on the mast above the ram platform seats in the seating aperture and accurately positions the ram platform below the upper core plate with the pin driving member in registry with the pin bore. A hydraulic cylinder is mounted on the mast above the locating plate and has a piston rod extending through the locating plate and fixedly secured to the ram platform for moving it up and down to drive the pin from the bore. Hydraulic fluid is carried to and from the cylinder through the mast tubes. A TV camera and lamp may be mounted on the mast above the drive cylinder for remote accurate positioning of the apparatus.
REFERENCES:
patent: 2947074 (1960-08-01), Newman
patent: 3077361 (1963-02-01), Tait et al.
patent: 3158051 (1964-11-01), DeMart
patent: 3838289 (1974-09-01), White
patent: 3887980 (1975-06-01), Yates et al.
patent: 4223575 (1980-09-01), Krueger
patent: 4243484 (1981-01-01), Tsuji et al.
patent: 4428903 (1984-01-01), Kasik et al.
Goldberg Howard N.
Satina D. M.
Wallace Ronald S.
Westinghouse Electric Corp.
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