ML19263D410
| ML19263D410 | |
| Person / Time | |
|---|---|
| Site: | Wood River Junction |
| Issue date: | 02/02/1979 |
| From: | Gregg R UNITED NUCLEAR CORP. (SUBS. OF UNC, INC.) |
| To: | Gunderson G NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 7903290191 | |
| Download: ML19263D410 (4) | |
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UNITED UDC MUCLEAR CORPORATION rust escovest cre AfroN/ Wood t!VI A JUNCTION. R.'8. 02494 February 2, 1979 MQA: 79-12 United States Nuclear Regulatory Commission Material Control Licensing Branch Division of Safeguards Washington, D.C.
20555 ATTENTION:
G. Gunderson Gentlemen:
In reference to your phone conversation with D.
Daigler on d
1/8/79, we are forwarding to you a process flow diagram and a e
description of the py posed process for your evaluation.
/h,/
If you have any questions concerning this matter, please contact D. Daigler who can provide the information you require.
Very truly yours, UNITED NUCLEAR CORPORATION M
b.llNG{
R.
J. Gregg Manager, Quality Assurance Fuel Recovery Operation RJG: DAD:cag as lh f
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A.
Daigler hb M.
A.
Clark W.
Conlan U
Attachments hdo DA '
11SS2 7903290191
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t LAGOON URANIUM RECOVER Description The uranium in the lagoons at FRO will be recovered for use in meeting FRO's uranium obligation to its customers.
The lagoon sludge will be slurried with water and transported to the heated dissolvers of the lagoon recovery equipment.
This slurry will be contacted with nitric acid and dissolved.
The solids remaining after dissolution will be separated from the solution by mechanical methods and discarded.
The uranium in solution at this point is expected to have a concentration of 0.01 g/1.
The uranium in the solids will be measured in order to assign a uranium value to the solids for disposal purposes.
The clarified dissolver solutions will be transferred to the uranium extraction unit.
The raffinate stream coming from the extraction system will be evaporated to generate solids for disposal and nitric acid for reuse.
The pregnant liquor coming from the extraction system will at this point have an approximate uranium concentration of 0.2 g/1.
This solution will then pass through the process area wall for further processing.
Once the uranium solution is passed through the process area wall, it is passed through an ion exchange unit.
The uranium-poor solution from the ion exchange unit will then pass back through the wall to the holding tank.
The eluent from the ion exchange unit, containing approximately 6.0 g/l will then be transferred to an accountability weigh tank.
After being weighed, sampled, and accountability esta-blished, the solution is transferred to holding tanks to wait further processing.
After the transfer to the holding tanks, the solution is evaporated to increase the uranium concentration to approximately 100 g/1.
The solution is then treated to further purify the uranium.
Accountability The initial accountability for the uranium recovered from the lagocn sludge is established in the seigh tank after the ion exchange unit.
The documentation ERDA/NRC Form 741, and the internal documents required to properly account for the uranium are made out using the values de ermined at this point (indicated as A on the flow diagram).
Prior to this point the uranium has not entered the documentation system so that accountability measurements of the waste streams are not required.
Strict accountability of the uranium entering the system will be maintained by the same procedures and techniques already used at FRO.
I Lagoon Uranium Recovery Page 2
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. Normal inventory procedures require that uranium, to the extent possible, be converted to oxide.
These procedures will not be
.possible for the material recovered from the lagoons, due to the
- uncertainty of the isotopic content of the uranium recovered.
The uranium recovered from the lagoons will be inventoried in some instances as a solution.
In order to avoid volumetric measurements the solutions will be transferred from the accountability tanks to a sealed storage tank.
The storage and all valves leading into or out of the tank shall be sealed at all times except during transfers into or out of the tank.
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