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Title: Separation of the rare-earth fission product poisons from spent nuclear fuel

Abstract

A method for the separation of the rare-earth fission product poisons comprising providing a spent nuclear fuel. The spent nuclear fuel comprises UO.sub.2 and rare-earth oxides, preferably Sm, Gd, Nd, Eu oxides, with other elements depending on the fuel composition. Preferably, the provided nuclear fuel is a powder, preferably formed by crushing the nuclear fuel or using one or more oxidation-reduction cycles. A compound comprising Th or Zr, preferably metal, is provided. The provided nuclear fuel is mixed with the Th or Zr, thereby creating a mixture. The mixture is then heated to a temperature sufficient to reduce the UO.sub.2 in the nuclear fuel, preferably to at least to 850.degree. C. for Th and up to 600.degree. C. for Zr. Rare-earth metals are then extracted to form the heated mixture thereby producing a treated nuclear fuel. The treated nuclear fuel comprises the provided nuclear fuel having a significant reduction in rare-earths.

Inventors:
;
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1312731
Patent Number(s):
9,428,401
Application Number:
13/622,034
Assignee:
U.S. Department of Energy (Washington, DC) INL
DOE Contract Number:
AC07-05ID14517
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Sep 18
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 36 MATERIALS SCIENCE; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS

Citation Formats

Christian, Jerry D., and Sterbentz, James W. Separation of the rare-earth fission product poisons from spent nuclear fuel. United States: N. p., 2016. Web.
Christian, Jerry D., & Sterbentz, James W. Separation of the rare-earth fission product poisons from spent nuclear fuel. United States.
Christian, Jerry D., and Sterbentz, James W. Tue . "Separation of the rare-earth fission product poisons from spent nuclear fuel". United States. doi:. https://www.osti.gov/servlets/purl/1312731.
@article{osti_1312731,
title = {Separation of the rare-earth fission product poisons from spent nuclear fuel},
author = {Christian, Jerry D. and Sterbentz, James W.},
abstractNote = {A method for the separation of the rare-earth fission product poisons comprising providing a spent nuclear fuel. The spent nuclear fuel comprises UO.sub.2 and rare-earth oxides, preferably Sm, Gd, Nd, Eu oxides, with other elements depending on the fuel composition. Preferably, the provided nuclear fuel is a powder, preferably formed by crushing the nuclear fuel or using one or more oxidation-reduction cycles. A compound comprising Th or Zr, preferably metal, is provided. The provided nuclear fuel is mixed with the Th or Zr, thereby creating a mixture. The mixture is then heated to a temperature sufficient to reduce the UO.sub.2 in the nuclear fuel, preferably to at least to 850.degree. C. for Th and up to 600.degree. C. for Zr. Rare-earth metals are then extracted to form the heated mixture thereby producing a treated nuclear fuel. The treated nuclear fuel comprises the provided nuclear fuel having a significant reduction in rare-earths.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 30 00:00:00 EDT 2016},
month = {Tue Aug 30 00:00:00 EDT 2016}
}

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