ANL technical support program for DOE Office of Environmental Management. Annual report, October 1994--September 1995

Technical Report · Mon Jul 01 04:00:00 EDT 1996

DOI:https://doi.org/10.2172/285471· OSTI ID:285471

Bates, J K; Buck, E C; Dietz, N L; DiSanto, T; Ebert, W L ^[1]

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1. and others

A program was established for the DOE Office of Environmental Management (EM) to evaluate factors that are anticipated to affect waste glass reaction during repository disposal, especially in an unsaturated environment typical of what may be expected for the proposed Yucca Mountain repository site. This report covers progress in FY 1995 on the following tasks: (1) Tests are ongoing to evaluate and compare the reactivity of fully radioactive glasses with that of glasses having the same compositions except for the absence of radionuclides under conditions representative of a high-level waste repository environment. Data from these tests will be used to evaluate the effect of radionuclides on the glass corrosion behavior and to determine the disposition of the radionuclides as the glass corrodes. Static dissolution tests and unsaturated tests are being conducted with several Defense Waste Processing Facility (DWPF) and West Valley Demonstration Project (WVDP) glasses. (2) A series of static dissolution tests is being performed to compare the corrosion behavior of nuclear waste glasses made with SRL 131 and SRL 202 frits at different S/V ratios. The S/V ratio affects the extent to which dissolved glass species are diluted; the solution chemistry then affects continued glass dissolution. The solutions generated in tests at high S/V ratios are conducive to the formation of alteration phases that may be deleterious to the glass. After long time periods, the glass dissolution rates of both glasses increase coincidentally with the formation of analcime and other alteration phases. However, the release of radionuclides from the glasses into solution is controlled by their individual solubilities.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 285471
• Report Number(s): ANL--96/11; ON: DE96014264
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
ANL
BOROSILICATE GLASS
HIGH-LEVEL RADIOACTIVE WASTES
PROGRAM MANAGEMENT
PROGRESS REPORT
SPENT FUELS
STABILITY
UNDERGROUND DISPOSAL
UNDERGROUND FACILITIES
VITRIFICATION
YUCCA MOUNTAIN