Alteration-phase formation and associated cesium release during alteration of R7T7 waste glass

Yaohiro Inagaki, Kazuya Idemitsu, Tatsumi Arima, T. Maeda, H. Ogawa, F. Itonaga

Research output: Contribution to journalConference article

11 Citations (Scopus)

Abstract

Static corrosion tests were performed with an inactive HLW glass of R7T7 type in order to evaluate alteration-phase formation and associated Cs release during the glass corrosion. The tests were performed in NaOH solutions at elevated temperatures in order to accelerate the corrosion. Crystalline phases formed in the corroded glass were analyzed by use of XRD, in addition to the solution analysis. The results indicated that; 1) Analcime or Na-beidellite or both of them form during the corrosion depending on the conditions, 2) Si rich amorphous phases are contained in the alteration-phases, 3) In addition to solution pH, solution concentrations of Na and K sensitively affect formation of analcime and Na-beidellite, 4) Analcime formation accelerates the glass corrosion, 5) Most of Cs in the glass is retained in the alteration-phases by sorption onto Na-beidellite or incorporation into amorphous phases and pollucite.

Original languageEnglish
Pages (from-to)589-596
Number of pages8
JournalMaterials Research Society Symposium - Proceedings
Volume713
Publication statusPublished - Jan 1 2002
EventScientific Basis for Nuclear Waste Management XXV - Boston, MA, United States
Duration: Nov 26 2001Nov 29 2001

Fingerprint

Cesium
cesium
corrosion
beidellite
analcime
glass
Corrosion
Glass
Sorption
sorption
X-ray diffraction
waste glass
Crystalline materials
temperature
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Alteration-phase formation and associated cesium release during alteration of R7T7 waste glass. / Inagaki, Yaohiro; Idemitsu, Kazuya; Arima, Tatsumi; Maeda, T.; Ogawa, H.; Itonaga, F.

In: Materials Research Society Symposium - Proceedings, Vol. 713, 01.01.2002, p. 589-596.

Research output: Contribution to journalConference article

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AU - Inagaki, Yaohiro

AU - Idemitsu, Kazuya

AU - Arima, Tatsumi

AU - Maeda, T.

AU - Ogawa, H.

AU - Itonaga, F.

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N2 - Static corrosion tests were performed with an inactive HLW glass of R7T7 type in order to evaluate alteration-phase formation and associated Cs release during the glass corrosion. The tests were performed in NaOH solutions at elevated temperatures in order to accelerate the corrosion. Crystalline phases formed in the corroded glass were analyzed by use of XRD, in addition to the solution analysis. The results indicated that; 1) Analcime or Na-beidellite or both of them form during the corrosion depending on the conditions, 2) Si rich amorphous phases are contained in the alteration-phases, 3) In addition to solution pH, solution concentrations of Na and K sensitively affect formation of analcime and Na-beidellite, 4) Analcime formation accelerates the glass corrosion, 5) Most of Cs in the glass is retained in the alteration-phases by sorption onto Na-beidellite or incorporation into amorphous phases and pollucite.

AB - Static corrosion tests were performed with an inactive HLW glass of R7T7 type in order to evaluate alteration-phase formation and associated Cs release during the glass corrosion. The tests were performed in NaOH solutions at elevated temperatures in order to accelerate the corrosion. Crystalline phases formed in the corroded glass were analyzed by use of XRD, in addition to the solution analysis. The results indicated that; 1) Analcime or Na-beidellite or both of them form during the corrosion depending on the conditions, 2) Si rich amorphous phases are contained in the alteration-phases, 3) In addition to solution pH, solution concentrations of Na and K sensitively affect formation of analcime and Na-beidellite, 4) Analcime formation accelerates the glass corrosion, 5) Most of Cs in the glass is retained in the alteration-phases by sorption onto Na-beidellite or incorporation into amorphous phases and pollucite.

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