Electric heating – Metal heating – By arc
Patent
1990-02-06
1990-12-25
Behrend, Harvey E.
Electric heating
Metal heating
By arc
B23K 2600, G21C 2118
Patent
active
049805355
ABSTRACT:
An apparatus and process for the construction of a cruciformed section control rod is disclosed. The control rod is characterized by having square exterior sectioned tubes with central cylindrical volumes for the containment of neutron absorbing poisons. In the process, these tubes are welded together at the corners of the square sections to form the planar members of the cruciformed shaped rods. An apparatus and process is disclosed in which the rods are all held by a jig in the same configuration as is ultimately fabricated. Thereafter, the jig is drawn through fixtures, which fixtures accurately guide the rods to be joined by welding past paired and opposed laser welding heads. By the expedient of positioning the laser and rapidly drawing the braced together tubes by the laser, control rod fabrication occurs. There results a solid, integral control rod constituting a suitable pressure vessel for neutron absorbers for control of nuclear reactions.
REFERENCES:
patent: 3407117 (1968-10-01), Lichtenberger
patent: 4354090 (1982-10-01), Nilsen
patent: 4798321 (1989-01-01), Moran
patent: 4840303 (1989-06-01), Fujii et al.
Aiello Louis L.
Charnley James E.
Dixon Robert C.
Mees James A.
Behrend Harvey E.
General Electric Company
Schroeder Robert R.
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