NESC0045 GRACE-1.

GRACE GRACE-1, MultiGroup Multi-Region Gamma Attenuation Gamma Dose in Slab Geometry

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, RELATED AND AUXILIARY PROGRAMS, 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: GRACE-1.

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2. COMPUTERS

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Program name	Package id	Status	Status date
GRACE-1	NESC0045/02	Tested	01-NOV-1967

Machines used:

Package ID	Orig. computer	Test computer
NESC0045/02	IBM 360 series	IBM 360 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

GRACE1 is a multigroup, multi- region, gamma-ray attenuation program designed primarily for computing gamma-ray heating and gamma-ray dose rates in multire- gion finite or semi-infinite slab shields. A different buildup factor may be specified for each source region considered.

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4. METHODS: METHOD OF SOLUTION

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

   Maximum number of regions = 30
   maximum number of mesh points in each region = 10
   maximum number of gamma-ray energy groups = 20
   maximum number of shield materials = 10
   maximum number of material buildup factors = 5

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6. TYPICAL RUNNING TIME

A sample problem involving 1 source region, 9 mesh points and 1 energy group required 39 seconds on the 7090.

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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

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8. RELATED AND AUXILIARY PROGRAMS: GRACE2 (ACC abstract 46).

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9. STATUS

Package ID	Status date	Status
NESC0045/02	01-NOV-1967	Tested at NEADB

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10. REFERENCES

- D. S. Duncan and A. B. Speir:
  GRACE I, An IBM 704-709 Program Designed for Computing Gamma-Ray Attenuation and Heating in Reactor Shields.
  NAA-SR-3719, 1959.
- J. Agresta:
  GRACE-I Note.
  Union Carbide Corporation

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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NESC0045/02	FORTRAN-IV

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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

   7090          R. A. Blaine
                 Supervisor, Reactor Computing Systems Unit
                 Mathematics and Computer Sciences
                 Atomics International
                 P. O. Box 309
                 Canoga Park, California
   1604          S. Elkin
                 Nuclear Applications Computation Center
                 Control Data Corporation
                 Computer Division
                 3145 Porter Drive
                 P. O. Box 10111
                 Palo Alto, California  94303

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16. MATERIAL AVAILABLE

NESC0045/02

File name	File description	Records
NESC0045_02.001	SOURCE & DATA 360/65	717
NESC0045_02.002	OUTPUT	144

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17. CATEGORIES

J. Gamma Heating and Shield Design

Keywords: dose rates, gamma radiation, heating, multigroup, shielding, slabs.