Computer Programs
NEA-1449 ROLAIDS-CPM.
last modified: 25-NOV-2002 | catalog | categories | new | search |

NEA-1449 ROLAIDS-CPM.

ROLAIDS-CPM, 1-D Slowing-Down by Collision Problems Method

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1. NAME OR DESIGNATION OF PROGRAM:  ROLAIDS-CPM9315.
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2. COMPUTERS
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Program name Package id Status Status date
ROLAIDS-CPM NEA-1449/01 Tested 25-NOV-2002

Machines used:

Package ID Orig. computer Test computer
NEA-1449/01 SUN PC Pentium III 500,Linux-based PC,IBM RISC6000 WS
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3. DESCRIPTION OF PROGRAM OR FUNCTION

ROLAIDS-CPM is based on the AMPX-module ROLAIDS (PSR-315).
CPM stands for Collision Probability Method.
ROLAIDS is a one-dimensional slowing-down code which uses the interface currents method. ROLAIDS-CPM does not need the assumption  of cosine currents at the interface of the zones.
Extensions: collision probability method for slab and cylinder geometry; different temperatures for a nuclide can be used; flat lethargy source can be modeled.
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4. METHOD OF SOLUTION

Collision probabilities in cylindrical geometry are calculated according to the Carlvik Method. This means that a Gauss integration is used.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The maximum number of zones is 30 for the collision probability method.
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6. TYPICAL RUNNING TIME

Slowing down calculation from 3.5 KeV to 2.7 eV in a typical PWR pin-cell geometry with 5 Gauss points, 12 zones and 40214 energy points takes 1027.86 minutes on a SUN SPARC station 10. Running time is about proportional to the number of Gauss points, the number of energy points and the square of the number of zones.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

ROLAIDS. PIR: produces input from pointwise data file generated by NJOY module BROADR.
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9. STATUS
Package ID Status date Status
NEA-1449/01 25-NOV-2002 Tested at NEADB
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10. REFERENCES

- I Carlvik,
  A Method for Calculating Collision Probabilities in General
  Cylindrical Geometry and Applications to Flux Distribution and
  Dancoff Factors
  International Conference on the Peaceful Use of Atomic Energy 3,
  P/681 (1964).
NEA-1449/01, included references:
- W.J.M. de Kruijf:
  ROLAIDS-CPM - A Code for Accurate Resonance Absorption
  Calculations
  ECN-R--93-013 (August 1993).
- W.J.M. De Kruijf and A.J. Janssen:
Benchmark Calculations on Resonance Absorption by U238 in a PWR
Pin-Cell Geometry
- W.J.M. de Kruijf:
Updates in ROLAIDS-CPM: 16 up to 25
(24 January 1995)
- W.J.M. de Kruijf:
Reactor Physics Analysis of the Pin-Cell Doppler Effect in a Thermal
Nuclear Reactor
(A computational study)
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1449/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  MS-Dos/Windows, SuSE linux 7.2, and AIX 4.0.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHORS

           W.J.M. de Kruijf
     Netherlands Energy Research Foundation ECN
     P.O. Box 1
     1755 ZG Petten, the Netherlands
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16. MATERIAL AVAILABLE
NEA-1449/01
source program   mag tapeROLAIDS.F FORTRAN Source File              SRCTP
source program   mag tapeSRC Source File                            SRCTP
source program   mag tapeUPN Update Format Source File              SRCTP
source program   mag tapeIR.F_A FORTRAN Source File                 SRCTP
source program   mag tapeIR.F_S FORTRAN Source File                 SRCTP
report                   ECN-R--93-013 (August 1993)                REPPT
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17. CATEGORIES
  • B. Spectrum Calculations, Generation of Group Constants and Cell Problems

Keywords: elastic scattering, one-dimensional, resonance absorption, slowing-down.