Framatome Gmbh

Societe De Travaux En Milieu Ionisant (s.t.m.i.)

Bernard P Lebouc

Andre G Charamathieu

Jean Dessales, Deceased

By Blanche Dessales Nee Vacher, Administratrix

For removal of the sludge deposits on the tube sheet of a steam generator which comprises, in a vertical cylindrical enclosure closed by said sheet, a bundle of parallel heat exchange U-shaped tubes sealingly connected to said sheet at both ends and distributed to form parallel sheets of tubes, a lance is radially moved from the center of the tubular plate between two parallel sheets of tubes rather than in the tube lane. Movement occurs in a direction parallel to the tube sheet and in close proximity to the latter. Two streams at least of cleaning fluid under a high pressure are directed toward the plate from the end portion of the lance and in directions which are fixed and symmetrical with respect to the direction of the two sheets of tubes. The streams are cut off as they confront the tubes during radial movement of the lance. And the cleaning fluid is flown out of the enclosure of the steam generator from the periphery of the bundle of tubes.

Process and apparatus for removal of the sludge deposits on the tube

A tool carrier unit, intended to be moved over a tube plate, comprises two perpendicular arms equipped with devices for engaging in the holes of the plate, and for moving the unit, step by step, by relative movement of the arms, across the plate. The unit comprises a supporting element in the form of an angle bracket defining a vee arranged with its apex perpendicular to the plate. The arms are arranged external to the vee, and at the inside of the vee, unaffected by the movement of the arms, guides are provided for supporting a tool.

Tool carrier unit movable over a tube-plate

Apparatus for use in screwing a cover onto an annular bearing seat provided at the circumference of a circular orifice, the cover being provided with a circle of screws to be engaged in threaded bores in the bearing seat, comprises a screwing device comprising an arm pivotable about the axis of a pivot mounted on a support plate to be fixed to the cover, the arm extending perpendicular to the axis of the pivot which extends perpendicular to the plane of the bearing seat, a screwing head mounted on the end of the arm and carrying a screw key for engaging and rotating the screws, and which is movable axially between an operative position engaging a screw and an inoperative position clear of the screw and permitting the arm to rotate to bring the screw key into alignment with another screw, and drive means for rotating the arm, for rotating the screw key and for moving the screw key axially, a remote control console for controlling the drive means, and a television circuit for remote observation of operation of the device.

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Courbevoie, France

Bernard P Lebouc