Lessons learned from vitrification campaigns at the DOE/Industrial Center for Vitrification Research at Clemson University
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Clemson Univ., Anderson, SC (United States)
Six vitrification campaigns on surrogate low-level radioactive mixed wastes have been completed at the DOE/Industrial Center for Vitrification Research at Clemson University. Two glass melters were utilized in these trials: the EnVitco EV-16 Joule heated glass melter and the Stir-Melter WV-0.25 stiffed melter. The quality of glass made in the melters was excellent. In all cases, glass durabilities (measured by the Product Consistency Test - PCT) were much better than the Environmental Assessment (EA) glass and leachabilities (measured by Toxic Characteristic Leaching Procedure - TCLP) were lower than Land Disposal Requirements (LDR). A few processing difficulties were encountered during the melter campaigns. These difficulties were due in part to a desire to obtain high waste loadings and aggressive operation of the melters. Devitrification of the melts was especially evident with high calcium compositions. In the EnVitco melter, corrosion of molybdenum electrodes occurred by alloying with reduced metals in the melt and significant corrosion of flux block refractory occurred when operating at high temperatures. In the stirred melter, rapid degradation of the impeller was observed in two instances likely due to localized melting of Inconel{trademark} 690 caused by a malfunctioning power supply. The focus of this paper is to describe the performance of the melters and convey {open_quotes}lessons learned{close_quotes} from these campaigns for application to current and future vitrification efforts.
- OSTI ID:
- 469795
- Report Number(s):
- CONF-960804-Vol.1; TRN: 97:008604
- Resource Relation:
- Conference: SPECTRUM `96: international conference on nuclear and hazardous waste management, Seattle, WA (United States), 18-23 Aug 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the international topical meeting on nuclear and hazardous waste management (SPECTRUM `96): Volume 1; PB: 885 p.
- Country of Publication:
- United States
- Language:
- English
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