Analytical electron microscopy examination of solid reaction products in long-term test of SRL 200 waste glasses

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:10116090

Buck, E C; Fortner, J A; Bates, J K; Feng, X; Dietz, N L; Bradley, C R; Tani, B S

Alteration phases, found on the leached surfaces and present as colloids in the leachates of 200-based frit (fully active and simulated) nuclear waste glass, reacted under static test conditions, at a surface area to leachate volume ratio of 20,000 m{sup {minus}1} for 15 days to 728 days, have been examined by analytical electron microscopy. The compositions of the secondary phases were determined using x-ray energy dispersive spectroscopy and electron energy loss spectroscopy, and structural analysis was accomplished by electron diffraction. Long-term samples of simulated glass, which had undergone an acceleration of reaction after 182 days, possessed a number of silicate secondary phases, including; smectite (iron silicate and potassium iron alumina-silicate, weeksite (uranium silicate), zeolite (calcium potassium alumino-silicate), tobermorite (calcium silicate), and a pure silica phase. However, uranium silicates and smectite have also been observed in tests, which have not undergone the acceleration of reaction, in both the leachate and leached layer, suggesting that these phases are not responsible for the acceleration of reaction.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10116090
• Report Number(s): ANL/CMT/CP--79802; CONF-931108--38; ON: DE94005482
• Country of Publication: United States
• Language: English

Related Subjects

052001
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360602
360604
CORROSION
CORROSION, EROSION, AND DEGRADATION
ELECTRON MICROSCOPY
GLASS
LEACHATES
PHASE TRANSFORMATIONS
RADIOACTIVE WASTES
STRUCTURE AND PHASE STUDIES
TESTING
VITRIFICATION
WASTE FORMS
WASTE PROCESSING