Development and testing of high-heat-flux components for the Tore Supra horizontal pump limiter module
The actively cooled pump limiter module located at the horizontal midplane of the Tore Supra Tokamak is designed for 2 MW of steady state power removal. For a thin (2.5 cm thick) limiter head which maximizes pumping and particle removal, this power load results in surface heat fluxes near 30 MW/m/sup 2/ at the leading edge and 10 MW/m/sup 2/ for the front surface. The initial design configuration for the high-heat-flux surfaces consisted of pyrolytic graphite armor tiles brazed to alumina dispersion strengthened copper tubes. Subsequent finite element analyses and braze tests showed that direct bonding of the highly anisotropic pyrolytic graphite to the strong (400 MPa yield strength) copper alloy led to cracking in the pyrolytic graphite tiles and a significant reduction in heat removal capabilities. To eliminate the graphite cracking problem, various compliant interlayers between the copper tube and the armor tile were tried. Interlayers tested included OFHC copper and several types of copper feltmetal. The resulting brazes were evaluated with metallurgical laboratory techniques and by testing at design heat fluxes with the use of a rastered electron beam apparatus. This paper describes the development and testing effort which solved the brazing difficulites, and resulted in a design capable of meeting design goals. 7 refs., 5 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6793181
- Report Number(s):
- SAND-88-2765C; CONF-880929-6; ON: DE89001187
- Country of Publication:
- United States
- Language:
- English
Similar Records
Assessing braze quality in the actively cooled Tore Supra Phase III outboard pump limiter
Assessing braze quality in the actively cooled Tore Supra phase III outboard pump limiter
Related Subjects
700204* -- Fusion Power Plant Technology-- Cooling Systems
ALLOYS
BRAZING
BRAZING ALLOYS
CARBON
CLOSED PLASMA DEVICES
COPPER
DESIGN
ELEMENTAL MINERALS
ELEMENTS
ENERGY TRANSFER
FABRICATION
GRAPHITE
HEAT TRANSFER
JOINING
LIMITERS
METALS
MINERALS
NONMETALS
PUMPED LIMITERS
TESTING
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TORE SUPRA TOKAMAK
TRANSITION ELEMENTS
TUBES
WELDING