NEA-0510 REEX-1.

1. NAME OR DESIGNATION OF PROGRAM:  REEX-1.

3. NATURE OF PHYSICAL PROBLEM SOLVED

Distribution profiles of uranium, nitrid acid and plutonium in counter-current stripping pluristage equipment.

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 correlations;
Several bucklings insure a complete balance all along the equipment.

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.

6. TYPICAL RUNNING TIME

The mean running time is about 30 seconds for one case (on IBM370).

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.

8. RELATED AND AUXILIARY PROGRAMS:  May be used in connection with PREDEX-1.

10. REFERENCES

- Mm. Chauve PEROT Jorgensen:
  'Calcul automatique d'extraction liquide-liquide'
  CHISA (Sep.69).

11. MACHINE REQUIREMENTS:  150k bytes of main storage.

13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  IBM 370 OS.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

15. NAME AND ESTABLISHMENT OF AUTHOR

     Mm. Dollfus - Cantin
     SGN - 23, boulevard Georges Clemenceau
     92400 Courbevoie (France)

File name	File description	Records
NEA0510_01.001	INFORMATIONS	4
NEA0510_01.002	SOURCE PROGRAM (F4,EBCDIC)	357
NEA0510_01.003	SAMPLE INPUT DATA	3
NEA0510_01.004	SAMPLE OUTPUT	105