last modified: 01-JUN-1974 | catalog | categories | new | search |

NEA-0425 COSTANZA-XE.

COSTANZA-XE, 2-D Pebble-Bed or Prismatic Fuel Elements HTR Dynamic in Cylindrical Geometry

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1. NAME OR DESIGNATION OF PROGRAM:  COSTANZA-XE.
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2. COMPUTERS
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Program name Package id Status Status date
COSTANZA-XE NEA-0425/01 Tested 01-JUN-1974

Machines used:

Package ID Orig. computer Test computer
NEA-0425/01 IBM 370 series IBM 370 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Two-dimensional reactor dynamics  in cylindrical geometry. The code is especially designed for high temperature pebble bed reactors or for reactors with prismatic elements. Optionally it can be used for the study of fast transients or for slow operational transients with xenon variation.
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4. METHOD OF SOLUTION

The neutronics uses a Krouk-Nicolson method, with direct solution along the radii for both energy groups, and Gauss-Seidel iterative method in axial (z) direction. The thermohydraulics is solved separately for each channel in two dimensions. The system of heat balance equations is solved with a direct method at each axial level. The solution obtained at the level (i) is used as boundary condition for the level (i+1).
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Two energy groups, six groups of delayed neutrons. The maximum number of mesh points is 350.
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6. TYPICAL RUNNING TIME:  15 minutes.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED AND AUXILIARY PROGRAMS

  COSTANZA-BBK one-dimensional (EUR 4410 E)
  COSTANZA-RZ (EUR 4673 E).
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9. STATUS
Package ID Status date Status
NEA-0425/01 01-JUN-1974 Tested at NEADB
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10. REFERENCES
NEA-0425/01, included references:
- K. Friedrich, E. Infuehr, L. Massimo, and E. Vincenti:
  'COSTANZA HRB, A Two Dimensional Dynamic Programme for High
   Temperature Gas Cooled Reactors and its Application to the THTR
   300 MWE Power Plant'
  EUR 5022 E (1973).
- Informal notes.
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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS  256k bytes main storage. One tape.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0425/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  Standard.
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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: E. Vincenti (+)
C.C.R. EURATOM
Ispra Establishment, Italy.
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16. MATERIAL AVAILABLE
NEA-0425/01
File name File description Records
NEA0425_01.001 SOURCE PROGRAM (F4) 2622
NEA0425_01.002 OVERLAY CARDS 8
NEA0425_01.003 SAMPLE INPUT 115
NEA0425_01.004 OUTPUT LIST OF SAMPLE PROBLEM 2989
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17. CATEGORIES
  • F. Space - Time Kinetics, Coupled Neutronics - Hydrodynamics - Thermodynamics

Keywords: HTGR reactors, hydraulics, iterative methods, pebble bed reactors, reactor kinetics, thermodynamics, transients, two-dimensional, xenon oscillations.