Determination of the forward rate of dissolution for SON68 and PAMELA glasses in contact with alkaline solutions

Research outputpeer-review

Abstract

In the new Belgian disposal design, the nuclear waste glass will be surrounded by a 3 cm thick carbon steel overpack and a 70 cm thick concrete buffer. An initially high pH is expected after water intrusion in the concrete buffer and this may have an effect on the radionuclide release from the waste glass. This study was performed in order to determine the forward rate of dissolution for SON68 and PAMELA glasses (SM513 LW11 and SM539 HE 540-12), conducting dynamic tests at 30°C in contact with alkaline solutions. In these experiments, the silicon concentration in solution was determined by UV/Visible spectrophotometry according to the blue β-silicomolybdenum method. The forward rates of dissolution were quite similar for the three glasses except at the highest pH for which a slightly higher value was found for SM539 glass. For SON68 glass, a good agreement with the previously established interpolation law was observed until pH 11.5, but at higher pH, the interpolation law slightly overestimates the dissolution rate.
Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings - Scientific Basis for Nuclear Waste Management XXXI
Place of PublicationWarrendale, PA, United States
PublisherMRS - Materials Research Society
Pages287-294
Number of pages8
ISBN (Print)9781605110790
DOIs
StatePublished - 1 Dec 2008
EventMRS 2007 - Materials Research Society - UK: 31st International Symposium on the Scientific Basis for Nuclear Waste Management - Materials Research Society, Sheffield
Duration: 16 Sep 200721 Sep 2007

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1107
ISSN (Print)0272-9172

Conference

ConferenceMRS 2007 - Materials Research Society - UK
Country/TerritoryUnited Kingdom
CitySheffield
Period2007-09-162007-09-21

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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