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NEA-0001 AIREK-MOD.

AIREK-MOD, Time Dependent Reactor Kinetics with Feedback Differential Equation

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1. NAME OR DESIGNATION OF PROGRAM:  AIREK-MOD.
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2. COMPUTERS
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Program name Package id Status Status date
AIREK-MOD NEA-0001/01 Tested 01-NOV-1967

Machines used:

Package ID Orig. computer Test computer
NEA-0001/01 IBM 360 series IBM 360 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Solves the reactor kinetic equations with respect to time. A standard form for the reactivity behaviour has been introduced in which the reactivity is given by the sum of a polynomial, sine, cosine and exponential expansion.
Tabular form is also included.
The presence of feedback differential equations in which the dependence on variables different from the considered one is considered enables many heat-exchange problems to be dealt with.
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4. METHOD OF SOLUTION

The method employed for the solution of the differential equations is the one developed by E.R. Cohen (Geneva Conference, 1958).
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The maximum number of differential equations that can be solved simultaneously is 50.
Within this limitation there may be n delayed neutron groups (n less than or equal to 25), on m other linear feedback equations (n+m less than or equal to 49).
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6. TYPICAL RUNNING TIME:  1-5 min. depending on the case.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED AND AUXILIARY PROGRAMS

AIREK-MOD is a program derived from  AIREK-2. New features are the standard form for the reactivity, the  presence in a number of differential equations of feedback variables different from the considered one and the production of a point-plot for the neutronic power.
AIREK-CDC is the CDC 1604A version of AIREK-MOD. It includes a modification to allow the output to be obtained after a sequence of  n time steps, (data(499)=1-n). For data (499) greater than zero, the job will be stopped.
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9. STATUS
Package ID Status date Status
NEA-0001/01 01-NOV-1967 Tested at NEADB
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10. REFERENCES

- A. Schwartz:
  Generalised Reactor Kinetics Code AIREK-II
  NAA-SR-MEMO 4980 (1959)
NEA-0001/01, included references:
- C. Mongini-Tamagnini:
  AIREK-MOD: A Modified Version of the Kinetic Code AIREK II,
  EUR 1914.e (August 1964)
- C.E.T.I.S.:
  AIREK-MOD (How to use the code)
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11. MACHINE REQUIREMENTS:  About 3k (+ library routines) core storage.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0001/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED

FORTRAN II under IBSYS, or FORTRAN II monitor. (IBM 7090).
IBM 360 Operating System.
CO-OP Monitor System (CDC1604).
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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

           C. Tamagnini
           CETIS
           EURATOM - C.C.R.
           Ispra (Varese), Italy

CDC 1604 version was offered by EIR (Institut Federal de Recherches en matiere de reacteurs, Switzerland).
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16. MATERIAL AVAILABLE
NEA-0001/01
File name File description Records
NEA0001_01.001 SOURCE & DATA 360/65 796
NEA0001_01.002 OUTPUT 2560
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17. CATEGORIES
  • E. Space-Independent Kinetics

Keywords: differential equations, heat exchangers, reactor kinetics.