The solubility of hydrogen in plutonium in the temperature range 475 to 825 degrees centigrade

Technical Report · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.2172/6291865· OSTI ID:6291865

Allen, T H

The solubility of hydrogen (H) in plutonium metal (Pu) was measured in the temperature range of 475 to 825{degree}C for unalloyed Pu (UA) and in the temperature range of 475 to 625{degree}C for Pu containing two-weight-percent gallium (TWP). For TWP metal, in the temperature range 475 to 600{degree}C, the saturated solution has a maximum hydrogen to plutonium ration (H/Pu) of 0.00998 and the standard enthalpy of formation ({Delta}H{degree}{sub f(s)}) is (-0.128 {plus minus} 0.0123) kcal/mol. The phase boundary of the solid solution in equilibrium with plutonium dihydride (PuH{sub 2}) is temperature independent. In the temperature range 475 to 625{degree}C, UA metal has a maximum solubility at H/Pu = 0.011. The phase boundary between the solid solution region and the metal+PuH{sub 2} two-phase region is temperature dependent. The solubility of hydrogen in UA metal was also measured in the temperature range 650 to 825{degree}C with {Delta}H{degree}{sub f(s)} = (-0.104 {plus minus} 0.0143) kcal/mol and {Delta}S{degree}{sub f(s)} = 0. The phase boundary is temperature dependent and the maximum hydrogen solubility has H/Pu = 0.0674 at 825{degree}C. 52 refs., 28 figs., 9 tabs.

• Research Organization: EG and G Rocky Flats, Inc., Golden, CO (United States). Rocky Flats Plant
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC34-90DP62349; AC04-76DP03533
• OSTI ID: 6291865
• Report Number(s): RFP-4456; ON: DE91006410
• Resource Relation: Other Information: Thesis (M.S.). Thesis. Submitted to University of Colorado
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
HYDROGEN
SOLUBILITY
PLUTONIUM
ADSORPTION
DISSOLUTION
GALLIUM
HIGH TEMPERATURE
ISOTHERMS
LIQUIDS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
THERMODYNAMICS
ACTINIDES
DIAGRAMS
ELEMENTS
FLUIDS
METALS
NONMETALS
SORPTION
TRANSURANIUM ELEMENTS
360104* - Metals & Alloys- Physical Properties
050700 - Nuclear Fuels- Fuels Production & Properties