Actinide speciation in glass leach-layers: An EXAFS study

Conference · Tue Dec 31 00:00:00 EST 1996

OSTI ID:459339

Biwer, B M; Soderholm, L ^[1]; Greegor, R B ^[2]; Lytle, F W ^[3]

---

1. Argonne National Lab., IL (United States)
2. Boeing Co., Seattle, WA (United States)
3. EXAFS Co., Pioche, NV (United States)

Uranium L{sub 3} X-ray absorption data were obtained from two borosilicate glasses, which are considered as models for radioactive wasteforms, both before and after leaching. Surface sensitivity to uranium speciation was attained by a novel application of simultaneous fluorescence and electron-yield detection. Changes in speciation are clearly discernible, from U(VI) in the bulk to (UO{sub 2}){sup 2+}-uranyl in the leach layer. The leach-layer uranium concentration variations with leaching times are also determined from the data.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States); Boeing Co., Seattle, WA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: FG06-84ER45121; W-31109-ENG-38
• OSTI ID: 459339
• Report Number(s): ANL/CHM/CP-90465; CONF-961202-93; ON: DE97003769; TRN: 97:007822
• Resource Relation: Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: [1996]
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
BOROSILICATE GLASS
WASTE FORMS
PHASE STUDIES
X-RAY SPECTROSCOPY
ABSORPTION SPECTROSCOPY
URANIUM OXIDES
LEACHING
VALENCE
RADIOACTIVE WASTE DISPOSAL