Electromagnetic apparatus for positioning objects located behind

Details Electromagnetic apparatus for positioning objects located behind Electromagnetic apparatus for positioning objects located behind

1988-07-26

1990-03-20

Wasil, Daniel

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

310 13, 335223, G21C 1900

Patent

active

049099809

ABSTRACT:
Apparatus for repositioning garter springs around the pressure tubes of Candu-type nuclear reactors. A primary coil having a high permeability core is inserted into the pressure tube. The coil is energized by an alternating current of a frequency and amplitude sufficient to produce a primary alternating electromagnetic field that penetrates the wall and induces an eddy current in the garter spring. A secondary alternating electromagnetic field is also produced and is reactive with the primary field to produce a travelling electromagnetic field of sufficient intensity and of such direction that the resultant of the electromagnetic forces acting on the garter spring causes the spring to move along the tube.

REFERENCES:
patent: 4613477 (1986-09-01), Dableh
"The AC Device for Repositioning of Garter Springs in CANDU Reactors", M. Cenanovic and H. Maureira, Nuclear Journal of Canada, vol. 1, No. 4, Dec. 1987, p. 355.
"Magnetic Metal Forming by Reversed Electromagnetic Forces", M. B. Cenanovic, 4th IEEE International Pulsed Power Conference, Albuquerque, New Mexico, Jun. 1983, Paper 6.4.
"Electromagnetic Forming of Zirconium and Other Strong Alloys", M. B. Cenanovic, 20th Annual Conference of Metallurgists, Hamilton, Ontario, Aug. 23-27, 1981, Paper 11.3.

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