Corrosion of K-3 Refractory and Metal Alloys in RPP-WTP LAW Glasses (Final Report)
- The Catholic Univ. of America, Washington, DC (United States)
In waste vitrification, the compatibility of the materials of construction with the waste· glass that the melter must process can be a major factor in determining system lifetime, downtime, maintenance, and replacement frequency. There is, at present, a limited number of strong candidate materials for key melter applications such as glass contact refractories, electrodes, bubblers, thermowells, etc. The preferred materials for these applications are typically high in chromium, and include Monofrax™ K-3 and Inconel 690, which have been the materials of choice in waste glass melters for over twenty years. While these materials have generally provided good resistance to corrosion, studies that have been ongoing at VSL since 1995 have shown-that the performance of these materials can be drastically affected by the waste glass composition. Accordingly, inclusion of materials corrosion test data as a function of glass composition has become an integral part of the VSL glass formulation process, particularly with respect to minimizing refractory corrosion. These observations, as well as the understanding of the underlying glass-material alteration mechanisms and the methods by which waste glass compositions can be rendered considerably less corrosive (while maintaining other glass properties in acceptable ranges), were developed for commercial waste vitrification applications with funding by Duratek Inc. A unique database with the results of hundreds of corrosion tests on a wide range of waste glass compositions and materials has been developed from that work. Seminal applications included the M-Area mixed waste vitrification facility (designed, built, and operated by Duratek, Inc. at the Savannah River site) and the BNFL Sellafield HLW Waste Vitrification Plant. Since Duratek Inc. was a member of the BNFLRPP-WTP Privatization team, this proprietary technology has also been applied in the development of all RPP-WTP glass formulations. The materials corrosion tests results obtained with the RPP-WTP LAW formulations are the subject of this report.
- Research Organization:
- Hanford Site (HNF), Richland, WA (United States); USDOE Office of River Protection (ORP), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Management (EM)
- DOE Contract Number:
- AC27-01RV14136
- OSTI ID:
- 1922114
- Report Number(s):
- ORP-63504-Rev.0; VSL-01R3540-1; TRN: US2310582
- Country of Publication:
- United States
- Language:
- English
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