NEA-0067 COSTANZA.

COSTANZA, 1-D 2 Group Space-Dependent Reactor Dynamics of Spatial Reactor with 1 Group Delayed Neutrons

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, AUXILIARIES, STATUS, REFERENCES, REQUIREMENTS, LANGUAGE, OPERATING SYSTEM, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: COSTANZA.

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2. COMPUTERS

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Program name	Package id	Status	Status date
COSTANZA	NEA-0067/01	Tested	01-JUL-1964

Machines used:

Package ID	Orig. computer	Test computer
NEA-0067/01	IBM 7090	IBM 7090

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3. NATURE OF PHYSICAL PROBLEM SOLVED

The programme studies the spatial dynamics of reactor TESI, in the two group and one space dimension approximation. Only one group of delayed neutrons is considered.
The programme simulates the vertical movement of the control rods according to any given movement law. The programme calculates the evolution of the fluxes and temperature and precursor concentration in space and time during the power excursion.

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4. METHODS: METHOD OF SOLUTION

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: The maximum number of lattice points is 100.

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6. TYPICAL RUNNING TIME: The computer time is about 0,15 sec. Per time step.

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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

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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-0067/01	01-JUL-1964	Tested at NEADB

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10. REFERENCES

NEA-0067/01, included references:

- R. Monterosso and E. Vincenti:
  Finite Difference Method for Solving the Spatio-Temporal Diffusion
  Equation in the Two-Group Approximation
  EUR 596.e (1964).
- A. Agazzi, R. Monterosso, E. Vincenti:
  COSTANZA, A Numerical Code for the Study of the Reactor Spatial
  Dynamics in Two Groups
  EUR 2103.e.
- A. Agazzi, R. Monterosso, E. Vincenti:
  The Code COSTANZA
  EUR 2104.e.

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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0067/01	FORTRAN-II (IBM)

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13. SOFTWARE REQUIREMENTS: OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED

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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

     A. Agazzi and C. Gavazzi S.P.A.
     Milano, Italy

     E. Vincenti and R. Monterosso
     EURATOM
     Ispra, Italy

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16. MATERIAL AVAILABLE

NEA-0067/01

File name	File description	Records
NEA0067_01.001	SOURCE & DATA	953
NEA0067_01.002	OUTPUT	143

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17. CATEGORIES

F. Space - Time Kinetics, Coupled Neutronics - Hydrodynamics - Thermodynamics

Keywords: control elements, excursions, mechanics, neutron flux, temperature distribution.