Direct heater with axially varying power distribution

Details Direct heater with axially varying power distribution Direct heater with axially varying power distribution

H - Electricity

05

B

26/123

H05B 3/42 (2006.01) G21C 17/00 (2006.01)

Patent

CA 1086925

ABSTRACT DIRECT HEATER WITH AXIALLY VARYING POWER DISTRIBUTION An electric cartridge heater is provided to simulate a reactor fuel element for use in tests of model nuclear reactor systems. The electric heat generating element corresponds in external shape and configuration to the fuel element and electrical current is passed through the tube from end to end. In order that the heat distribution will simulate that of the actual fuel element, the wall or thickness of the tube is varied from end to end, being thickest at each end and thinnest in the middle. This is attained by starting with a uniform tube and expanding the central section so that its internal diameter is greatest in the middle and least at each end. The external surface is then machined to its required uniform diameter whereby the wall thickness varies. By proper calculation, the desired wall thickness scan be determined to provide the proper power distribution.

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