The reaction of SRL 202 glass in J-13 and DIW

Conference · Thu Dec 31 04:00:00 EST 1992

OSTI ID:138787

Ebert, W L; Bates, J K; Buck, E C

Static leach tests were performed in both 304L stainless steel and Teflon vessels using a synthetic high-level waste glass with either deionized water (DIW) or a tuff groundwater solution as the leachant to assess the effects of the vessel and the initial leachant composition on the extent and nature of the glass reaction. The tests were performed using monolith samples at 340 m{sup {minus}1} and crushed samplesat 2000 m{sup {minus}1} for times up to 1 year. The results show less silicon is released from the glass into the groundwater solution than into DIW at both high and low glass surface area/leachant volume ratios (SAN), but the alkali metal and boron releases are not affected by the leachant used. Tests performed in a stainless steel vessel resulted in slightly lower leachate pH values, but similar reaction rates to those performed in a Teflon vessel, as measured by the boron release. Blank tests with DIW or EJ-13 in the vessels showed the Teflon vessels to release small amounts of fluoride (1 to 2 ppm) and to acidify the DIW slightly (4.0 < pH < 5.6). The pH values of blank tests with EJ- 1 3 increased from 8.2 to about 8.6 in steel and to about 9.2 in Teflon vessels. The slightly higher pH values attained in Teflon vessels are attributed to outgassing of CO{sub 2} during the test.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 138787
• Report Number(s): ANL/CMT/CP--76238; CONF-921101--71; ON: DE93006405
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CLEANING
COMPARATIVE EVALUATIONS
CORROSION
GLASS
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
LEACHATES
LEACHING
PH VALUE
RADIOACTIVE WASTE PROCESSING
SAVANNAH RIVER PLANT
STAINLESS STEEL-304L
TEFLON
TUFF
VITRIFICATION
Yucca Mountain Project