Iodine solubility in a low-activity waste borosilicate glass at 1000°C
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Washington State Univ., Pullman, WA (United States)
- Dept. of Energy (DOE), Richland. WA (United States) Office of River Protection
The purpose of this study was to determine the solubility of iodine in a low-activity waste borosilicate glass when heated inside an evacuated and sealed fused quartz ampoule. The iodine was added to glass frit as KI in quantities of 100–24000 ppm iodine (by mass), each mixture was added to an ampoule, the ampoules were heated at 1000 °C for 2h, and then air quenched. In samples with ≥12000 ppm iodine, low viscosity salt phases were observed on the surface of the melts during cooling that solidified into a white coating upon cooling. These salts were identified as mixtures of KI, NaI, and Na2SO4 with X-ray diffraction (XRD). The iodine concentrations in glass specimens were analyzed with inductively-coupled plasma mass spectrometry and the overall iodine solubility was determined to be 10000 ppm by mass. Several crystalline inclusions of iodine sodalite, Na8(AlSiO4)6I2, were observed in the 24000 ppm specimen as determined by micro-XRD and wavelength dispersive spectroscopy.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1378575
- Report Number(s):
- LBNL-182016; ir:182016
- Journal Information:
- Journal of Nuclear Materials, Vol. 452, Issue 1-3; ISSN 0022-3115
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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