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Title: High Level Waste (HLW) Processing Experience with Increased Waste Loading

Abstract

The Defense Waste Processing Facility (DWPF) Engineering requested characterization of glass samples that were taken after the second melter had been operational for about 5 months. After the new melter had been installed, the waste loading had been increased to about 38 weight percentage after a new quasicrystalline liquidus model had been implemented. The DWPF had also switched from processing with refractory Frit 200 to a more fluid Frit 320. The samples were taken after DWPF observed very rapid buildup of deposits in the upper pour spout bore and on the pour spout insert while processing the high waste loading feedstock. These samples were evaluated using various analytical techniques to determine the cause of the crystallization. The pour stream sample was homogeneous, amorphous, and representative of the feed batch from which it was derived. Chemical analysis of the pour stream sample indicated that a waste loading of 38.5 weight per cent had been achieved. The data analysis indicated that surface crystallization, induced by temperature and oxygen fugacity gradients in the pour spout, caused surface crystallization to occur in the spout and on the insert at the higher waste loadings even though there was no crystallization in the pour stream.

Authors:
Publication Date:
Research Org.:
Savannah River Site (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
828535
Report Number(s):
WSRC-MS-2004-00286, Rev. 0
TRN: US0404013
DOE Contract Number:  
AC09-96SR18500
Resource Type:
Conference
Resource Relation:
Conference: 106th Annual Meeting American Ceramic Society, Indianapolis, IN (US), Conference dates not provided; Other Information: PBD: 8 Jun 2004
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; BUILDUP; CERAMICS; CHEMICAL ANALYSIS; CRYSTALLIZATION; DATA ANALYSIS; GLASS; OXYGEN; PROCESSING; WASTE PROCESSING; WASTES; DWPF; POUR SPOUT PLUGGAGE; LIQUIDUS; POURING

Citation Formats

JANTZEN, CAROL. High Level Waste (HLW) Processing Experience with Increased Waste Loading. United States: N. p., 2004. Web.
JANTZEN, CAROL. High Level Waste (HLW) Processing Experience with Increased Waste Loading. United States.
JANTZEN, CAROL. Tue . "High Level Waste (HLW) Processing Experience with Increased Waste Loading". United States. https://www.osti.gov/servlets/purl/828535.
@article{osti_828535,
title = {High Level Waste (HLW) Processing Experience with Increased Waste Loading},
author = {JANTZEN, CAROL},
abstractNote = {The Defense Waste Processing Facility (DWPF) Engineering requested characterization of glass samples that were taken after the second melter had been operational for about 5 months. After the new melter had been installed, the waste loading had been increased to about 38 weight percentage after a new quasicrystalline liquidus model had been implemented. The DWPF had also switched from processing with refractory Frit 200 to a more fluid Frit 320. The samples were taken after DWPF observed very rapid buildup of deposits in the upper pour spout bore and on the pour spout insert while processing the high waste loading feedstock. These samples were evaluated using various analytical techniques to determine the cause of the crystallization. The pour stream sample was homogeneous, amorphous, and representative of the feed batch from which it was derived. Chemical analysis of the pour stream sample indicated that a waste loading of 38.5 weight per cent had been achieved. The data analysis indicated that surface crystallization, induced by temperature and oxygen fugacity gradients in the pour spout, caused surface crystallization to occur in the spout and on the insert at the higher waste loadings even though there was no crystallization in the pour stream.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 08 00:00:00 EDT 2004},
month = {Tue Jun 08 00:00:00 EDT 2004}
}

Conference:
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