Aging effects in palladium and LaNi sub 4. 25 Al sub 0. 75 tritides

Conference · Sat Feb 29 23:00:00 EST 1992 · Fusion Technology; (United States)

OSTI ID:5102220

Nobile, A; Wermer, J R ^[1]; Walters, R T ^[2]

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1. Savannah River Lab., Aiken, SC (United States)
2. Princeton Univ., NJ (United States). Plasma Physics Lab.

Palladium and LaNi{sub 5{minus}x}Al{sub x} (x = 0.30, 0.75, 0.85), which from reversible hydrides, are used for tritium processing and storage in the Savannah River Site (SRS) tritium facilities. As part of a program to develop technology based on the use of reversible metal hydrides for tritium processing and storage, the effects of aging on the thermodynamic behavior of palladium and LaNi{sub 4.25}Al{sub 0.75} tritides are under investigation. During aging, the {sup 3}He tritium decay product remains in the tritide lattice and changes the thermodynamics of the tritium-metal tritide system. Aging effects in 755-day-aged palladium and 1423-day-aged LaNi{sub 4.25}Al{sub 0.75} tritides are reported. Changes in the thermodynamics are determined by measuring tritium desorption isotherms on aging samples. In palladium, aging deceases the desorption isotherm plateau pressure and changes the {alpha}-phase portion of the isotherm. aging-induced changes in desorption isotherms are more drastic in LaNi{sub 4.25}Al{sub 0.75}. Various processes occurring in the tritide lattice which might be responsible for the observed aging effects in palladium and LaNi{sub 4.25}Al{sub 0.75} tritides are discussed in this paper.

• DOE Contract Number: AC09-89SR18035
• OSTI ID: 5102220
• Report Number(s): CONF-910920--
• Journal Information: Fusion Technology; (United States), Journal Name: Fusion Technology; (United States) Vol. 21:2; ISSN 0748-1896; ISSN FUSTE
• Country of Publication: United States
• Language: English

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AGING
ALUMINIUM COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BETA DECAY RADIOISOTOPES
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HELIUM 3
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HYDROGEN ISOTOPES
ISOTHERMS
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LANTHANUM COMPOUNDS
LIGHT NUCLEI
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NATIONAL ORGANIZATIONS
NICKEL COMPOUNDS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PALLADIUM COMPOUNDS
PHYSICAL PROPERTIES
PROCESSING
QUATERNARY COMPOUNDS
RADIOISOTOPES
RARE EARTH COMPOUNDS
SAVANNAH RIVER PLANT
SORPTION
STABLE ISOTOPES
STORAGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRITIDES
TRITIUM
TRITIUM COMPOUNDS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
YEARS LIVING RADIOISOTOPES