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NEA-0117 TRAWS-4.

TRAWS-4, Axial Flux Distribution for Control Rod Variations

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, AUXILIARIES, 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:  TRAWS-4.
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2. COMPUTERS
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Program name Package id Status Status date
TRAWS-4 NEA-0117/01 Tested 01-NOV-1964

Machines used:

Package ID Orig. computer Test computer
NEA-0117/01 IBM 7094 IBM 7094
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Evaluates axial flux distribution in a reactor for varying control rod insertions.
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4. METHOD OF SOLUTION

Newtons iterative method is applied to solve the transcendental equations which give the buckling.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Up to 25 values of control rod insertion can be treated in one case, and successive cases in one run. Simple one-group expressions for flux are used.
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6. TYPICAL RUNNING TIME

A 10 rod insertion case takes about 5 seconds  on the 7094.
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7. UNUSUAL FEATURES OF THE PROGRAM

Prints values of flux at intervals  of one-tenth of reactor height for each rod insertion, as well as buckling in regions with and without control rod.
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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-0117/01 01-NOV-1964 Tested at NEADB
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10. REFERENCES: - Mrs. J.O. Gedge:, TRAWS-4, CEGB, CB/A/0I19.
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11. MACHINE REQUIREMENTS:  32k.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0117/01 FORTRAN-II (IBM)
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  FORTRAN II monitor.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:  Can run on a smaller machine.
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15. NAME AND ESTABLISHMENT OF AUTHOR

Mrs. J.O. Gedge
                                   C.E.G.B. Computing Branch
                                   Friars House
                                   Blackfriars Road
                                   London S.E.1.
                                   England
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16. MATERIAL AVAILABLE
NEA-0117/01
File name File description Records
NEA0117_01.001 SOURCE & DATA 162
NEA0117_01.002 OUTPUT 43
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17. CATEGORIES
  • C. Static Design Studies

Keywords: buckling, control elements, distribution, iterative methods, neutron flux.