Tritium permeation through clean Incoloy 800 and Sanicro 31 alloys and through steam oxidized Incoloy 800
- Oak Ridge National Lab., TN
The tritium permeabilities, DK, of Incoloy 800 and Sanicro 31 have been determined for tube samples that were protected from surface oxidation by electroplated nickel. The permeabilities of these analogous alloys over the 400 to 750/sup 0/C range were essentially equal; DK = 0.566 exp (-16120/RT) and 0.367 exp (-15610/RT cm/sup 3/ (T/sub 2/.STP).mm/(cm/sup 2/.min.torr/sup 1/2/), respectively. The effects of in-situ steam oxidation of Incoloy 800 were observed to reduce tritium permeabilities by factors up to 400 at 150 days. Permeabilities of the oxides formed at 520, 660 and 725/sup 0/C were determined to be 5.4 E-11, 4.9 E-10 and 2.4 E-9 cc (T/sub 2/, STP) .mm/(cm/sup 2/.min.torr/sup 1/2/), respectively. Severe thermal shock was observed to essentially destroy the permeation barrier characteristics of the oxide coatings while mild temperature cycling had no observable effects on permeation rates through the oxide coated material.
- OSTI ID:
- 5408904
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 11:5; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CRACKS
CRYOGENIC FLUIDS
DEPOSITION
ELEMENTS
EMBRITTLEMENT
FLUIDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HYDROGEN
HYDROGEN ISOTOPES
INCOLOY 800
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
ISOTOPES
LIGHT NUCLEI
MATERIALS
NICKEL ALLOYS
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
RADIOISOTOPES
SORPTIVE PROPERTIES
STEAM
SURFACE COATING
SURFACE PROPERTIES
TRITIUM
YEARS LIVING RADIOISOTOPES