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Title: Cryolite process for the solidification of radioactive wastes

Abstract

An improved method is provided for solidifying liquid wastes containing significant quantities of sodium or sodium compounds by calcining in a fluidized-bed calciner. The formation of sodium nitrate which will cause agglomeration of the fluidized-bed particles is retarded by adding aluminum and a fluoride to the waste in order to produce cryolite during calcination. The off-gas of the calciner is scrubbed with a solution containing aluminum in order to complex any fluoride which may be liberated by subsequent dissolution of cryolite and prevent corrosion in the off-gas cleanup system.

Inventors:
 [1];  [2]
  1. Idaho Falls, ID
  2. Fort Belvoir, VA
Issue Date:
Research Org.:
Aerojet Nuclear Co., Idaho Falls, Idaho (USA). Idaho National Engineering Lab.
OSTI Identifier:
862476
Patent Number(s):
3943062
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
DOE Contract Number:  
AT(10-1)-1375
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
cryolite; process; solidification; radioactive; wastes; improved; method; provided; solidifying; liquid; containing; significant; quantities; sodium; compounds; calcining; fluidized-bed; calciner; formation; nitrate; agglomeration; particles; retarded; adding; aluminum; fluoride; waste; produce; calcination; off-gas; scrubbed; solution; complex; liberated; subsequent; dissolution; prevent; corrosion; cleanup; wastes containing; liquid wastes; bed particles; gas cleanup; improved method; solution containing; radioactive waste; liquid waste; radioactive wastes; sodium nitrate; solidifying liquid; prevent corrosion; containing aluminum; fluidized-bed calciner; significant quantities; gas clean; sodium compound; /588/976/

Citation Formats

Wielang, Joseph A, and Taylor, Larry L. Cryolite process for the solidification of radioactive wastes. United States: N. p., 1976. Web.
Wielang, Joseph A, & Taylor, Larry L. Cryolite process for the solidification of radioactive wastes. United States.
Wielang, Joseph A, and Taylor, Larry L. Thu . "Cryolite process for the solidification of radioactive wastes". United States. https://www.osti.gov/servlets/purl/862476.
@article{osti_862476,
title = {Cryolite process for the solidification of radioactive wastes},
author = {Wielang, Joseph A and Taylor, Larry L},
abstractNote = {An improved method is provided for solidifying liquid wastes containing significant quantities of sodium or sodium compounds by calcining in a fluidized-bed calciner. The formation of sodium nitrate which will cause agglomeration of the fluidized-bed particles is retarded by adding aluminum and a fluoride to the waste in order to produce cryolite during calcination. The off-gas of the calciner is scrubbed with a solution containing aluminum in order to complex any fluoride which may be liberated by subsequent dissolution of cryolite and prevent corrosion in the off-gas cleanup system.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {1}
}

Patent:

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