NEA-0169 PROCOPE.

PROCOPE, Collision Probability in Pin Clusters and Infinite Rod Lattices

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, AUXILIARIES, 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: PROCOPE.

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2. COMPUTERS

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Program name	Package id	Status	Status date
PROCOPE	NEA-0169/01	Tested	01-AUG-1969

Machines used:

Package ID	Orig. computer	Test computer
NEA-0169/01	IBM 360 series	IBM 360 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

Calculation of directional collision probabilities in pin clusters and infinite rod lattices.

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4. METHOD OF SOLUTION

a) Gauss integration of analytical expressions for collision probabilities.
b) alternately, an approximate closed expression (not involving integrals) may be used for pin-to-pin interactions.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

number of fuel pins must be smaller than 62.
maximum number of groups of symmetry is 300.

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6. TYPICAL RUNNING TIME

a) A complete calculation for a 7 rod cluster requires around 5 minutes with the exact method, 2 minutes for the approximate technique.
b) For lattice problems, the running time is very sensitive to cross section input data, the approximate technique is always much faster than the exact method typically 30 sec. vs. 30 min.

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7. UNUSUAL FEATURES OF THE PROGRAM

The programme evaluates the directional collision probabilities (radial and axial) in two dimensional geometry.

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8. RELATED OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS

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9. STATUS

Package ID	Status date	Status
NEA-0169/01	01-AUG-1969	Tested at NEADB

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10. REFERENCES

- L. Amyot and P. Benoist:
First Flight Collision Probabilities in Pin Clusters and Rod
Lattices
Nuclear Science and Engineering, 28,215-225 (1967)

NEA-0169/01, included references:

- L. Amyot and P. Benoist:
  First Flight Collision Probabilities in Pin Clusters and Rod
  Latices
  EUR 2751.e (1966)
- C. Daolio:
  PROCOPE - A Code to Evaluate Collision Probabilities in Pin
  Clusters and Infinite Rod Lattices
  EUR 3296.e (1967)

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11. MACHINE REQUIREMENTS: 8 magnetic tapes divided into 2 channels.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0169/01	FORTRAN-IV

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: FORTRAN monitor 7090 system.

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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

       L. Amyot, C. Daolio
       Commission des Communautes Europeennes
       21020 - Ispra
       Italy
       P. Benoist
       CEA - Saclay

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16. MATERIAL AVAILABLE

NEA-0169/01