Heat pipe stabilized specimen container

Details Heat pipe stabilized specimen container Heat pipe stabilized specimen container

1985-08-27

1986-10-21

Davis, Jr., Albert W.

Heat exchange

Movable heating or cooling surface

Rotary drum

165 47, 374 45, 374 57, 376202, 376245, G05D 2300, F28D 1500

Patent

active

046179852

ABSTRACT:
A heat pipe stablized specimen container for irradiation of specimens at substantially constant temperature within a liquid metal cooled fast reactor comprises a heat pipe containing a vaporizable substance such as sodium. The container is of double-walled construction with the gap filled with argon and at top of the container a volume of argon is trapped within a cavity of the liquid metal level within the container in such a way that retention of argon in this zone is not dependent on sealing welds in the structure of the container, the argon blanket in this zone affording thermal insulation at the top of the container and also around part of the heat pipe, viz an adiabatic section of the latter. The heat pipe includes three layer wick structure 84 comprising an outer relatively fine mesh layer, a coarse intermediate layer and a fine inner layer for promoting unimpeded return of condensate to the evaporation section of the heat pipe while enhancing heat transfer with the heat pipe wall and reducing entrainment of the condensate by the upwardly rising vapor.

REFERENCES:
patent: 3525386 (1970-08-01), Grover
patent: 3996465 (1976-12-01), Beauchede

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