last modified: 01-AUG-1979 | catalog | categories | new | search |

NEA-0509 PREDEX-1.

PREDEX-1, U, Pu, Nitric Acid Distribution in Counter Current Solvent Extraction

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1. NAME OR DESIGNATION OF PROGRAM:  PREDEX-1.
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2. COMPUTERS
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Program name Package id Status Status date
PREDEX-1 NEA-0509/01 Tested 01-AUG-1979

Machines used:

Package ID Orig. computer Test computer
NEA-0509/01 IBM 370 series IBM 370 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Distribution profiles of uranium, nitric acid and plutonium in counter-current solvent extraction and  washing (scrubbing) pluristage equipment.
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4. METHOD OF SOLUTION

Calculation made stage by stage (up to 20 stages), considering:
- the equilibrium modelisation of uranium distribution for any acid concentration;
- the equilibrium modelisation of nitric acid distribution for any uranium concentration;
- the percentage of tributylphosphate and diluent;
- the temperature effect;
- the real flow-rate corrections.
Several bucklings ensure a complete balance along the equipment.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

It is assumed that the plutonium concentration is relatively low and does not change the balance of other constituents.
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6. TYPICAL RUNNING TIME

The mean running time is about 40 seconds for  one case (on  IBM 370).
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7. UNUSUAL FEATURES OF THE PROGRAM

The programme is especially applied to prediction calculations for solvent extraction equipment in inactive or active uranium treatment plants.
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8. RELATED AND AUXILIARY PROGRAMS:  May be used in connection with REEX-1.
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9. STATUS
Package ID Status date Status
NEA-0509/01 01-AUG-1979 Tested at NEADB
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10. REFERENCES

- Chauve PEROT Jorgensen:
  'calcul automatique d'extraction liquide-liquide'
  CHISA (September 1969).
NEA-0509/01, included references:
- User's Notice Ref. R/TC-JD/MLD No.184 129 (July 9, 1976)
An Uranium-Plutonium Concentration Profile Calculation code PREDEX
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11. MACHINE REQUIREMENTS:  150k bytes of main storage.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0509/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  IBM370 OS.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHOR

Mm. Dollfus - Cantin
SGN - 23, boulevard Georges Clemenceau
92400 Courbevoie (France)
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16. MATERIAL AVAILABLE
NEA-0509/01
File name File description Records
NEA0509_01.001 INFORMATIONS 4
NEA0509_01.002 SOURCE PROGRAM (F4,EBCDIC) 779
NEA0509_01.003 SAMPLE INPUT DATA 5
NEA0509_01.004 SAMPLE OUTPUT 141
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17. CATEGORIES
  • U. Chemistry

Keywords: distribution, nitric acid, plutonium, solvent extraction, uranium.