last modified: 01-OCT-1971 | catalog | categories | new | search |

NEA-0101 REP-3.

REP-3, Time-Dependent Xe and Sm Poisoning from Space-Dependent Flux Distribution

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1. NAME OR DESIGNATION OF PROGRAM:  REP-3.
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2. COMPUTERS
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Program name Package id Status Status date
REP-3 NEA-0101/01 Tested 01-OCT-1971

Machines used:

Package ID Orig. computer Test computer
NEA-0101/01 IBM 360 series IBM 360 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Time variation of xenon and samarium poisoning due to space-dependent flux distribution.
Conventional space independent poisoning also computed. Power variations given in histogram form.
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4. METHOD OF SOLUTION

Three-dimensional flux and adjoint distributions are synthesised from 1- and 2-dimensional runs. Fluxes are sorted into n equal intervals and flux adjoint weight is calculated for each interval. This weighting function is then used to compute reactivity worth of poisons as function of time. N is normally of order 100.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
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6. TYPICAL RUNNING TIME

About 30 printing steps per second with 100 point weighting function.
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7. UNUSUAL FEATURES OF THE PROGRAM

More accurate than space independent approximation for reactors with widely varying flux distribution. Much faster than computing poisoning at every mesh point.
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8. RELATED AND AUXILIARY PROGRAMS

Programme CRAM to produce two-dimensional fluxes and adjoints.
Programme WTAP to produce weighting function.
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9. STATUS
Package ID Status date Status
NEA-0101/01 01-OCT-1971 Tested at NEADB
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10. REFERENCES
NEA-0101/01, included references:
- A. Brickstock and A.R. Davies:
  REP3 - A Spatially Dependant Fission Product Poisoning Code
  for the IBM 7030
  AWRE O-69/66 (January 1967)
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11. MACHINE REQUIREMENTS

REP-3 - 32k storage but easily modified for smaller store. Clock if available.
WTAP. 32k storage but easily modified for smaller store.
One tape unit.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0101/01 FORTRAN-STRETCH (IBM-7030)
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED

REP-3 - S2 under monitor control (7030).
WTAP FORTRAN II under monitor control (7090).
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

Programme CRAM readily replaced with any comparable two-dimensional  programme.
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15. NAME AND ESTABLISHMENT OF AUTHOR

A. Brickstock
                                   R. Davies
                                   A.W.R.E.
                                   Aldermaston
                                   Berks
                                   U.K.
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16. MATERIAL AVAILABLE
NEA-0101/01
File name File description Records
NEA0101_01.001 SOURCE PROGRAMME + INPUT DATA FOR SAMPLE CAS 292
NEA0101_01.002 OUTPUT LIST OF SAMPLE CASE 75
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17. CATEGORIES
  • D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics
  • F. Space - Time Kinetics, Coupled Neutronics - Hydrodynamics - Thermodynamics

Keywords: flux synthesis, kinetics, poisoning, power distribution, space dependence, three-dimensional, time dependence.