NEA-0509 PREDEX-1.

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

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.

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.