1. NAME AND TITLE
SAP N and G: Neutron and Gamma-Ray Albedo Model Scatter Shield Analysis Code.
Westinghouse Astronuclear Laboratory, Pittsburgh, Pennsylvania.
3. CODING LANGUAGE AND COMPUTER
FORTRAN IV; IBM 7090 and 7094.
4. NATURE OF PROBLEM SOLVED
Gamma-ray or neutron dose rates from radiation reflected from plane or cylindrical surfaces
are calculated at receiver points.
5. METHOD OF SOLUTION
Formulas involving albedo data and incident dose rates are integrated over surfaces. The
neutron albedo data are based on French and Wells and the gamma-ray data on Berber and Raso.
"Opaque" finite planes may be included to account for shielding by "optically dense" material
encountered by reflected radiation. These planes may be assigned an attenuation factor.
6. RESTRICTIONS OR LIMITATIONS
The following limitations are noted:
Maximum number of receiver points: 1000
Maximum number of opaque planes or shielding cylindrical surfaces: 100
Maximum number of energy groups: 100
Scattering cylindrical surface must be parallel to Z-axis.
7. TYPICAL RUNNING TIME
Estimated running times for packaged sample problems in minutes: SAP-N, 0.01; SAP-G,
8. COMPUTER HARDWARE REQUIREMENTS
The codes were designed for a 32-K IBM 7090 using standard I-O.
9. COMPUTER SOFTWARE REQUIREMENTS
The code is operable on the IBM 7090/7094 IBSYS Operating System using IBJOB Processor.
L. D. Stephenson, F. Planinsek, A. Killinger, and B. J. Sapovchak, "SAP A Neutron and Gamma Ray Albedo Model Scatter Shield Analysis Program," WANL-TME-1273 (September 1965).
L. D. Stephenson and B. J. Sapovchak, "N-SAP and G-SAP Neutron and Gamma Ray
Albedo Model Scatter Shield Analysis Programs," WANL-TME-1273 Revision A (December
11. CONTENTS OF CODE PACKAGE
Included are the referenced documents and one (1.2MB) DOS diskette which contains the
source codes and input and output for two sample problems.
12. DATE OF ABSTRACT
May 1969; updated July 1981.
KEYWORDS: NEUTRON; GAMMA-RAY; ALBEDO; NUMERICAL INTEGRATION