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 Title: |
US4481134:
Method for forming microspheres for encapsulation of nuclear waste
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Angelini, Peter; Oak Ridge, TN
Caputo, Anthony J.; Knoxville, TN
Hutchens, Richard E.; Knoxville, TN
Lackey, Walter J.; Oak Ridge, TN
Stinton, David P.; Knoxville, TN
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| Assignee: |
The United States of America as represented by the United States Department of Energy, Washington, DC
other patents from UNITED STATES OF AMERICA, DEPARTMENT OF ENERGY (597195) (approx. 6,712)
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| Published / Filed: |
1984-11-06
/ 1982-01-29
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| Application Number: |
US1982000343803
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| IPC Code: |
Advanced:
G21F 9/16;
Core:
more...
IPC-7:
G21F 9/16;
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| U.S. Class: |
Current:
588/019;
252/635;
264/000.5;
976/DIG.385;
Original:
252/628;
252/635;
264/000.5;
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| Field of Search: |
252/635,628
264/0.5
034/046,48,50
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| Government Interest: |
BACKGROUND OF THE INVENTION
This invention was made under a contract with the United States Department of Energy and relates to a process for making particles in which nuclear waste is immobilized.
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| Priority Number: |
| 1982-01-29 |
US1982000343803 |
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| Abstract: |
Microspheres for nuclear waste storage are formed by gelling droplets containing the waste in a gelation fluid, transferring the gelled droplets to a furnace without the washing step previously used, and heating the unwashed gelled droplets in the furnace under temperature or humidity conditions that result in a substantially linear rate of removal of volatile components therefrom.
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| Attorney, Agent or Firm: |
Larcher, Earl L. ;
Hamel, Stephen D. ;
Esposito, Michael F. ;
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| Primary / Asst. Examiners: |
Kyle, Deborah L.;
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 4 claims |
We claim:
1. A method for forming microspheres containing nuclear waste, comprising:
- contacting droplets containing said nuclear waste with a gelation liquid to gel said droplets;
- placing the droplets which have been contacted with said gelation liquid in a furnace without washing said gelation liquid therefrom; and
- drying and then calcining the unwashed gelled droplets in said furnace while adjusting the humidity or temperature in the furnace so as to remove from said droplets up to about 75% by weight of the water and other volatile material therein at a substantially linear mass loss rate.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 4 U.S. patent(s) that reference this one
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| Foreign References: |
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| Other References: |
Kanij et al., "Het Sol-Gel Proces", Atoomenergie, 9, (E), (Oct. 1967), pp. 213-224.
Lackey et al., "Alternative High-Level Waste Forms Development", ORNL/TM-7118, (Dec. 1979), pp. 25-32.
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