FURTHER WORK ON THE DIFFUSION OF KRYPTON-85 FROM URANIUM DIOXIDE POWDER

Technical Report · Mon Aug 01 04:00:00 EDT 1960

OSTI ID:4141291

Auskern, A B

Fission-gas diffusion anneals on two stoichiometric and two nonstoichiometric large-grain uranium dioxide powders indicate a high activation enengy (70 to 80 kcal/mole) for diffusion in stoichiometric UO/sub 2/ and a lower activation energy (30 to 40 kcal/mole) and higher diffusion coefficients for nonstoichiometric UO/sub 2/. The agreement of the high temperature results for the two different stoichiometric UO/sub 2/ powders with results on dense UO/sub 2/ plates is good. Anneals for short times, where the emanation rate can be more rapid than that governed by true lattice diffusion. can result in diffusion coefficients that are too large. This rapid initial emanation can result from surface cracks or a thin surface layer of high-oxygen content. (auth)

• Research Organization: Westinghouse Electric Corp. Bettis Atomic Power Lab., Pittsburgh
• DOE Contract Number: AT(11-1)-GEN-14
• NSA Number: NSA-14-025532
• OSTI ID: 4141291
• Report Number(s): WAPD-TM-225
• Country of Publication: United States
• Language: English

Related Subjects

ANNEALING
CHEMISTRY
CRACKS
DIFFUSION
FISSION PRODUCTS
GASES
GRAIN SIZE
HIGH TEMPERATURE
KRYPTON 85
LATTICES
OXYGEN
POWDERS
SURFACES
URANIUM DIOXIDE