NEA-0072 ZADOC.

ZADOC, 2 Group Time-Dependent Burnup in X-Y Geometry with Fuel Management

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, 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 OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: ZADOC.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.

Program name	Package id	Status	Status date
ZADOC	NEA-0072/01	Tested	01-JUN-1965

Machines used:

Package ID	Orig. computer	Test computer
NEA-0072/01	IBM 7090	IBM 7090

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3. NATURE OF PHYSICAL PROBLEM SOLVED

Two neutron group diffusion equations for a square mesh in x-y geometry are solved to yield a power distribution. Burnup for one time step is simulated by inter- polation in a library of two-group cross sections which forms part of the problem data. It is assumed that the power distribution is invariant during one time step, at the end of which a re-calculation of flux and power follows automatically. Burnup proceeds in a succession of time steps and a number of fuel management options are available.

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4. METHOD OF SOLUTION: Standard finite difference methods are used.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The programme is restricted to two neutron groups. Limits on the number of mesh points are as follows

IBM 7030 61 x 61
IBM 7090 32 x 32
see also AEEW - R.425.

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6. TYPICAL RUNNING TIME: See AEEW - R.425.

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7. UNUSUAL FEATURES OF THE PROGRAM: See AEEW - R.425.

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8. RELATED AND AUXILIARY PROGRAMS

The METHUSELAH programme reported in AEEW - R.135 may be used to produce libraries of two group cross sections required for ZADOC calculations.

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9. STATUS

Package ID	Status date	Status
NEA-0072/01	01-JUN-1965	Tested at NEADB

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10. REFERENCES

- F.R. Allen:
ZADOC, A Two Group, Two Dimensional Fuel Management Programme for IBM 7090 or Stretch
AEEW-R 425.

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11. MACHINE REQUIREMENTS

IBM 7090 - a 32k store is required for the standard version of the programme arranged to take up to 32 x 32 mesh points. Simple changes to a number of dimension statements would allow the programme to be accommodated in a smaller store.
A clock is required by the standard version, though this could be dispensed with by simple modifications to the programme. Where a clock is not available, a modificed version of the programme terminates on total burnup time rather than total execution time.
IBM 7030 - the 7030 version is written in S2 suitable for use on the Aldermaston computer. Variable dimension statements are employed so that the programme could be used in different sizes of core, e.g. when a 80,000 store is available up to 61 x 61 mesh points can be employed.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0072/01	FORTRAN-II (IBM)

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: FORTRAN monitor for IBM 7090, S2 (A.W.R.E. Aldermaston).

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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS: No programmer tapes, no discs, no links.

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15. NAME AND ESTABLISHMENT OF AUTHOR

Dr. F.R. Allen
                                   A.E.E., Winfrith,
                                   Dorchester
                                   Dorset, England

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16. MATERIAL AVAILABLE

NEA-0072/01