Iron - Phosphate Glass (IPG) Waste Forms Produced Using Induction Melter with Cold Crucible

Abstract

A simulated sodium bearing waste (SBW), which represented a type of high sodium and sulfate waste, was successfully vitrified in iron phosphate glasses (IPG), at a maximum waste loading of 40 wt%, using a cold crucible induction melter (CCIM). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that all of the IPG waste forms did not contain sulfate salt segregation or crystalline phases. The calculated composition and the average analytical composition obtained by Electron Probe Microanalysis (EPMA) were in good agreement. The major elements were uniformly distributed throughout the samples. The chemical durability of the IPG waste forms containing 40wt% SBW was evaluated by the product consistency test (PCT) and met current DOE requirements. IPG waste forms were melted at a relatively low temperature and for short times compared to borosilicate glasses. These advantages, combined with those of a significantly higher waste loading and the feasibility for CCIM melting, offer a considerable savings in time, energy, and cost for vitrifying this high sodium and sulfate waste.

Meeting Name

Scientific Basis for Nuclear Waste Management XXVII (2003: Jun. 15-19, Kalmar, Sweden)

Department(s)

Materials Science and Engineering

Second Department

Nuclear Engineering and Radiation Science

Keywords and Phrases

Cold crucible induction melter (IPG); Electron probe microanalysis (EPMA); Product consistency test (PCT); Sodium bearing waste (SBW); Borosilicate glass; Carbonates; Composition; Crystallization; Durability; Electric conductivity; Electrodes; Melting; Mossbauer spectroscopy; Scanning electron microscopy; Silicates; Silicon carbide; X ray diffraction analysis

International Standard Serial Number (ISSN)

0272-9172

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Materials Research Society (MRS), All rights reserved.

Publication Date

01 Jan 2004

Link to Full Text

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