Process for the replacement of a heating rod of a pressurizer of

Details Process for the replacement of a heating rod of a pressurizer of Process for the replacement of a heating rod of a pressurizer of

1990-06-12

1991-10-29

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

376307, 2940207, 29906, G21C 1920

Patent

active

050614339

ABSTRACT:
To ensure the sealed fixing of a replacement heating rod (4) on a collar (3) for passing through the casing (1) of a pressurizer, a weld is made in a single pass by a regulated MIG process. A shaft is fixed on one end of the heating rod projecting in relation to the collar (3) and in the extension thereof. A welding device is engaged and fixed in position on the shaft, this welding device comprising a tubular support (14) and an inert-gas orbital welding torch (10) with an electrode made of fusible metal, rotatably mounted about the axis of the support (14) which coincides with the axis of the rod (4). The welding torch (10) and a device to unwind welding wire which is placed in a cabinet (6) are set into synchronous rotation during the welding, by appropriate drive means. The welding is carried out in a single pass on the entire periphery of the heating rod (4) and of the collar (3).

REFERENCES:
patent: 3194937 (1965-07-01), Brons et al.
patent: 4255840 (1981-03-01), Loch et al.
patent: 4319961 (1982-03-01), Coussau et al.
patent: 4707002 (1987-11-01), Boissier et al.
patent: 4804813 (1989-02-01), Tesch

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