NEA-1449 ROLAIDS-CPM.

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

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, 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 UNDER WHICH PROGRAM IS EXECUTED, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

[ top ]

1. NAME OR DESIGNATION OF PROGRAM: ROLAIDS-CPM9315.

[ top ]

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
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

[ top ]

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.

[ top ]

4. METHOD OF SOLUTION

Collision probabilities in cylindrical geometry are calculated according to the Carlvik Method. This means that a Gauss integration is used.

[ top ]

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The maximum number of zones is 30 for the collision probability method.

[ top ]

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.

[ top ]

7. UNUSUAL FEATURES OF THE PROGRAM:

[ top ]

8. RELATED AND AUXILIARY PROGRAMS

ROLAIDS. PIR: produces input from pointwise data file generated by NJOY module BROADR.

[ top ]

9. STATUS

Package ID	Status date	Status
NEA-1449/01	25-NOV-2002	Tested at NEADB

[ top ]

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)

[ top ]

11. MACHINE REQUIREMENTS:

[ top ]

12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-1449/01	FORTRAN-77

[ top ]

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: MS-Dos/Windows, SuSE linux 7.2, and AIX 4.0.

[ top ]

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

[ top ]

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

[ top ]

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

[ top ]

17. CATEGORIES

B. Spectrum Calculations, Generation of Group Constants and Cell Problems

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