NEA-0464 PN.

PN, 1-D, 2-D, 3-D MultiGroup Neutron Transport

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, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: PN.

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2. COMPUTERS

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Program name	Package id	Status	Status date
PN	NEA-0464/01	Tested	01-DEC-1976

Machines used:

Package ID	Orig. computer	Test computer
NEA-0464/01	IBM 370 series	IBM 370 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

The static multigroup neutron transport equation is solved in one, two or three dimensions.

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4. METHODS

METHOD OF SOLUTION. The flux is expanded in spherical harmonics - Diffusion type equations are obtained for the even moments and these are solved using over relaxation methods.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: 10000 mesh points in 37 groups.

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6. TYPICAL RUNNING TIME: Problem dependent.

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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-0464/01	01-DEC-1976	Tested at NEADB

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10. REFERENCES: - TRG Reports 2547(R) and 2849(R).

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11. MACHINE REQUIREMENTS: 590 kbytes of fast store and 6 disc files.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0464/01	FORTRAN-IV

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: RIOS of ICL 470. OS of IBM 370.

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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

   J.K. Fletcher
   Central Technical Services
   Risley
   United Kingdom.

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16. MATERIAL AVAILABLE

NEA-0464/01

File name	File description	Records
NEA0464_01.001	PROGRAM SOURCE AND LIBRARY ROUTINES - FORTRA	6812
NEA0464_01.002	PROGRAM LIBRARY ROUTINES - ASSEMBLER	614
NEA0464_01.003	SAMPLE PROBLEM DATA	18
NEA0464_01.004	SAMPLE PROBLEM OUTPUT	97
NEA0464_01.005	OVERLAY STRUCTURE	33
NEA0464_01.006	JCL FOR SAMPLE PROBLEM	8

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17. CATEGORIES

C. Static Design Studies

Keywords: multigroup, neutron transport theory, one-dimensional, spherical harmonics, three-dimensional, two-dimensional.