Initial experiments on the hydrothermal interaction of supercalcine and supercalcine plus basalt with groundwater at 300 degree C and 300 bars

Technical Report · Mon Sep 01 04:00:00 EDT 1980

OSTI ID:5327914

Jenkins, D M

This report describes the initial results on two experiments involving a mixture of supercalcine + groundwater (SPCW 1-1) and basalt + supercalcine + groundwater (BSPW 1-1). Both experiments were run in Dickson-type rocker bombs at 300{degree}C, 300 bars and with a 10:1 ratio of water to solid. Solution samples were taken periodically over the 30-day duration of the runs. Solution analyses revealed that only Na, Si, Mo, Rb, and Cr were present in any appreciable amount, with very minor amounts of U and rare earth elements. Groundwater buffered by unsintered supercalcine has pH values that level off to about 9.5 after 300 hours. Groundwater buffered by unsintered supercalcine + basalt has pH values that continue to decrease after 700 hours and that are markedly lower, the final pH value being 7.5. A reconnaissance examination of the run products showed a considerable degree of reaction after 30 days. The only reliability identified phase was pollucite (CsAlSi{sub 2}O{sub 6}) which appears as both spherical nodules and euhedral crystals. 9 refs., 4 figs., 7 tabs.

• Research Organization: Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations
• Sponsoring Organization: DOE/RW
• DOE Contract Number: AC06-77RL01030
• OSTI ID: 5327914
• Report Number(s): RHO-BWI-TI-044; ON: TI90005440
• Country of Publication: United States
• Language: English

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