Tritium pumping based on asymmetric permeation
The variation in the steady state hydrogen permeation flux magnitude through composite metals under both molecular and atomic hydrogen upstream driving conditions is discussed. With molecular hydrogen upstream, the permeant flux magnitude does not depend on the permeant direction through the composite. Under atomic hydrogen bombardment conditions on the upstream side, however, this magnitude does depend on the permeant direction. In a two layer system, the permeant flux magnitude is enhanced by orienting the composite metal such that the layer with the higher product of solubility (S) with surface recombination rate constant (k /sub r/ ) faces downstream. Furthermore, the degree of asymmetry in the hydrogen flow (forward permeation/reverse permeation) increases with decreasing upstream pressure. First measurements on a copper-clad mild steel membrane are presented and confirm the expected permeation performance.
- Research Organization:
- Ontario Hydro Research Division, Toronto, Ontario
- OSTI ID:
- 5869042
- Report Number(s):
- CONF-850405-
- Journal Information:
- Fusion Technol.; (United States), Journal Name: Fusion Technol.; (United States) Vol. 8:2; ISSN FUSTE
- Country of Publication:
- United States
- Language:
- English
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ALLOYS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BOUNDARY LAYERS
COMPOSITE MATERIALS
COPPER
DIFFUSION
ELEMENTS
FLUID FLOW
FLUID MECHANICS
HETEROGENEOUS EFFECTS
HYDRAULICS
HYDROGEN
HYDROGEN ISOTOPES
IRON ALLOYS
IRON BASE ALLOYS
ISOTOPES
LAYERS
LIGHT NUCLEI
MATERIALS
MECHANICS
METALS
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
PERMEABILITY
PUMPING
RADIOISOTOPES
RECOMBINATION
SOLUBILITY
STEADY FLOW
STEADY-STATE CONDITIONS
STEELS
TRANSITION ELEMENTS
TRITIUM
YEARS LIVING RADIOISOTOPES