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Title: Recovery of fissile materials from nuclear wastes

Abstract

A process for recovering fissile materials such as uranium, and plutonium, and rare earth elements, from complex waste feed material, and converting the remaining wastes into a waste glass suitable for storage or disposal. The waste feed is mixed with a dissolution glass formed of lead oxide and boron oxide resulting in oxidation, dehalogenation, and dissolution of metal oxides. Carbon is added to remove lead oxide, and a boron oxide fusion melt is produced. The fusion melt is essentially devoid of organic materials and halogens, and is easily and rapidly dissolved in nitric acid. After dissolution, uranium, plutonium and rare earth elements are separated from the acid and recovered by processes such as PUREX or ion exchange. The remaining acid waste stream is vitrified to produce a waste glass suitable for storage or disposal. Potential waste feed materials include plutonium scrap and residue, miscellaneous spent nuclear fuel, and uranium fissile wastes. The initial feed materials may contain mixtures of metals, ceramics, amorphous solids, halides, organic material and other carbon-containing material.

Inventors:
 [1]
  1. (Oak Ridge, TN)
Publication Date:
Research Org.:
LOCKHEED MARTIN ENERGY RES COR
OSTI Identifier:
872559
Patent Number(s):
US 5961679
Assignee:
U. S. Department of Energy (Washington, DC) ORNL
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
recovery; fissile; materials; nuclear; wastes; process; recovering; uranium; plutonium; rare; earth; elements; complex; waste; feed; material; converting; remaining; glass; suitable; storage; disposal; mixed; dissolution; formed; lead; oxide; boron; resulting; oxidation; dehalogenation; metal; oxides; carbon; added; remove; fusion; melt; produced; essentially; devoid; organic; halogens; easily; rapidly; dissolved; nitric; acid; separated; recovered; processes; purex; exchange; stream; vitrified; produce; potential; scrap; residue; miscellaneous; spent; fuel; initial; contain; mixtures; metals; ceramics; amorphous; solids; halides; carbon-containing; acid waste; nuclear wastes; earth elements; waste feed; boron oxide; organic materials; feed material; waste stream; nitric acid; nuclear fuel; metal oxide; rare earth; spent nuclear; metal oxides; nuclear waste; fissile material; organic material; feed materials; lead oxide; waste glass; earth element; carbon-containing material; containing material; recovering fissile; glass formed; fissile materials; plutonium scrap; amorphous solid; /65/588/

Citation Formats

Forsberg, Charles W. Recovery of fissile materials from nuclear wastes. United States: N. p., 1999. Web.
Forsberg, Charles W. Recovery of fissile materials from nuclear wastes. United States.
Forsberg, Charles W. Fri . "Recovery of fissile materials from nuclear wastes". United States. doi:. https://www.osti.gov/servlets/purl/872559.
@article{osti_872559,
title = {Recovery of fissile materials from nuclear wastes},
author = {Forsberg, Charles W.},
abstractNote = {A process for recovering fissile materials such as uranium, and plutonium, and rare earth elements, from complex waste feed material, and converting the remaining wastes into a waste glass suitable for storage or disposal. The waste feed is mixed with a dissolution glass formed of lead oxide and boron oxide resulting in oxidation, dehalogenation, and dissolution of metal oxides. Carbon is added to remove lead oxide, and a boron oxide fusion melt is produced. The fusion melt is essentially devoid of organic materials and halogens, and is easily and rapidly dissolved in nitric acid. After dissolution, uranium, plutonium and rare earth elements are separated from the acid and recovered by processes such as PUREX or ion exchange. The remaining acid waste stream is vitrified to produce a waste glass suitable for storage or disposal. Potential waste feed materials include plutonium scrap and residue, miscellaneous spent nuclear fuel, and uranium fissile wastes. The initial feed materials may contain mixtures of metals, ceramics, amorphous solids, halides, organic material and other carbon-containing material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1999},
month = {Fri Jan 01 00:00:00 EST 1999}
}

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