1. NAME AND TITLE

SAP N and G: Neutron and Gamma-Ray Albedo Model Scatter Shield Analysis Code.

2. CONTRIBUTOR

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, 0.01.

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.

10. REFERENCES

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 1966).

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.