Induced nuclear reactions: processes – systems – and elements – Fission reactor material treatment – Impurity removal
Patent
1984-03-19
1987-01-27
Nelson, Peter A.
Induced nuclear reactions: processes, systems, and elements
Fission reactor material treatment
Impurity removal
376260, 376249, 376258, 151041C, G21C 1942
Patent
active
046393510
ABSTRACT:
A repair device for removing an inner surface layer on a feed-water connector of a reactor pressure vessel received in a reactor housing having an assembly platform with a carriage displaceable thereon transversely to the reactor pressure vessel, the repair device includes centering means located at a lower end of a telescopically extensible upright tube suspended from the carriage for centering the lower end of the upright tube in the pressure vessel, the centering means having at least two outwardly swingable supports and a hydraulic system for swinging the two supports outwardly umbrella-like; a supporting frame for a feed rod also disposed at the lower end of the upright tube, the feed rod being horizontally self-supporting at an end thereof; a drive motor connected to the feed rod for rotating the feed-rod; means located at the self-supporting end of the feed rod for centrally fixing the self-supporting end in the feed-water connector of the reactor pressure vessel; and a horizontally displaceable turning machine tool mounted on the feed rod, the turning machine tool having a face plate and a radially movable holder for a turning tool bit carried by the mounting support.
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Forner Siegfried
Katscher Erich
Ring Stefan
Greenberg Laurence A.
Kraftwerk Union Aktiengesellschaft
Lerner Herbert L.
Nelson Peter A.
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