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The interaction between Synroc-C and pure water or Boom clay

Book ·
OSTI ID:264435
; ;  [1];  [2];  [3]
  1. SCK-CEN, Mol (Belgium)
  2. ANSTO, Lucas Heights, New South Wales (Australia)
  3. Chalmers Univ., Gothenburg (Sweden)
The authors investigated the interaction between Synroc-C and deionized water or Boom clay disposal media. The authors used powdered Synroc-C to achieve high SA/V (surface area to volume) conditions (100, 1,000, 10,000 m{sup {minus}1}). The temperature was 90 C. Reaction progress up to 10{sup {minus}+6} days/m was reached. They conclude that dissolution in DW is mainly controlled by initial ion exchange, followed by matrix dissolution. In both Boom clay media (a 500 g/l and a 2,000 g/l clay/claywater mixture) matrix dissolution is dominating. The depletion depth of the main Synroc constituent Ti is below 250 mn in the clay media, and below 2 nm in DW after 110 days corrosion at 100 m{sup {minus}1}. The corrosion rates are very small, though the authors cannot present meaningful values. The effect of Boom clay is mainly to increase the solubility of Ti, Zr and the rare earths in solution.
OSTI ID:
264435
Report Number(s):
CONF-951155--; ISBN 1-55899-315-0
Country of Publication:
United States
Language:
English

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