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Title: Molten tin reprocessing of spent nuclear fuel elements

Abstract

A method and apparatus for reprocessing spent nuclear fuel is described. Within a containment vessel, a solid plug of tin and nitride precipitates supports a circulating bath of liquid tin therein. Spent nuclear fuel is immersed in the liquid tin under an atmosphere of nitrogen, resulting in the formation of nitride precipitates. The layer of liquid tin and nitride precipitates which interfaces the plug is solidified and integrated with the plug. Part of the plug is melted, removing nitride precipitates from the containment vessel, while a portion of the plug remains solidified to support the liquid tin and nitride precipitates remaining in the containment vessel. The process is practiced numerous times until substantially all of the precipitated nitrides are removed from the containment vessel.

Inventors:
 [1]
  1. (Castro Valley, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
864619
Patent Number(s):
4392995
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
molten; reprocessing; spent; nuclear; fuel; elements; method; apparatus; described; containment; vessel; solid; plug; nitride; precipitates; supports; circulating; bath; liquid; therein; immersed; atmosphere; nitrogen; resulting; formation; layer; interfaces; solidified; integrated; melted; removing; portion; remains; support; remaining; process; practiced; numerous; times; substantially; precipitated; nitrides; removed; containment vessel; fuel elements; fuel element; nuclear fuel; spent nuclear; remains solid; /252/423/976/

Citation Formats

Heckman, Richard A. Molten tin reprocessing of spent nuclear fuel elements. United States: N. p., 1983. Web.
Heckman, Richard A. Molten tin reprocessing of spent nuclear fuel elements. United States.
Heckman, Richard A. Sat . "Molten tin reprocessing of spent nuclear fuel elements". United States. https://www.osti.gov/servlets/purl/864619.
@article{osti_864619,
title = {Molten tin reprocessing of spent nuclear fuel elements},
author = {Heckman, Richard A.},
abstractNote = {A method and apparatus for reprocessing spent nuclear fuel is described. Within a containment vessel, a solid plug of tin and nitride precipitates supports a circulating bath of liquid tin therein. Spent nuclear fuel is immersed in the liquid tin under an atmosphere of nitrogen, resulting in the formation of nitride precipitates. The layer of liquid tin and nitride precipitates which interfaces the plug is solidified and integrated with the plug. Part of the plug is melted, removing nitride precipitates from the containment vessel, while a portion of the plug remains solidified to support the liquid tin and nitride precipitates remaining in the containment vessel. The process is practiced numerous times until substantially all of the precipitated nitrides are removed from the containment vessel.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

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