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Title: Molten tin reprocessing of spent nuclear fuel elements

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