1. NAME AND TITLE

PF-COMP: Building Fallout Radiation Protection Factor Analysis.

This code package is retained by RSIC to preserve technology developed in civil defense programs in the 1960s.

2. CONTRIBUTORS

Research Triangle Institute, Raleigh, North Carolina.

U. S. Army Office of Civil Defense, Washington, D. C.

3. CODING LANGUAGE AND COMPUTER

FORTRAN 64; CDC 3600.

4. NATURE OF PROBLEM SOLVED

The PF-COMP program performs analysis of structures to determine the protection offered against fallout gamma radiation. It was designed for use, primarily, in such programs as the Military Overseas Shelter Survey, the Evaluation of Fallout Protection in Homes, and continuing National Fallout Shelter Surveys.

5. METHOD OF SOLUTION

A building protection factor (PF) calculational procedure is employed. The code is an implementation of the "Engineering Manual Method" of fallout analysis. The procedure considers contributions from the roof, setbacks, and limited planes of contamination (including areaways). The effects of apertures, interior partitions, floors, detector height above planes of contamination, mutual shielding, and building geometry are included.

This program is capable of determining the PF in the center of a building part, at eight additional predetermined locations, and at one additional arbitrary location. On the basis of the PF's at these points, the approximate area of the building part having a given protection factor is determined.

6. RESTRICTIONS OR LIMITATIONS

There are no apparent restrictions.

7. TYPICAL RUNNING TIME

No statistics have been accumulated by RSIC as to typical running time. Estimated running time on the CDC 3600 for the 34 packaged sample problems: 48 minutes.

8. COMPUTER HARDWARE REQUIREMENTS

The code was designed for a CDC 3600 using standard I-O and a maximum of four tape units.

9. COMPUTER SOFTWARE REQUIREMENTS

The code is operable on the CDC 3600 scope system. A RTI table tape is required as input. MOSS data input by tape is optional.

10. REFERENCES

a. Included in package:

E. L. Hill, F. Johnson, and R. O. Syday, Jr., "Computer Program for Analysis of Building Protection Factors," Research Triangle Institute Research Memorandum RM-205-1, Part II (July 1965).

E. L. Hill, F. Johnson, and R. O. Syday, Jr., "Summary of a Computer Program for Analysis of Building Protection Factors," OCD Working Paper (March 1965).

M. D. Wright and R. O. Syday, Jr., "PF-COMP Computer Program Test Building," OCD Working Paper (January 1966).

OCD Publication, "Design and Review of Structures for Protection from Fallout Gamma Radiation," PM-100-1 (February 1965).

OCD Publication, "Military Overseas Shelter Survey, Phase I, Data Collection Form Instructions," Prepared by Research Triangle Institute (October 1965).

OCD Publication, "Military Overseas Shelter Survey, Phase 2, Data Collection Form Instructions," Prepared by Research Triangle Institute (October 1965).

C. Eisenhauer, "An Engineering Method for Calculating Protection Afforded by Structures Against Fallout Radiation," PM-100-1 Supplement (January 1964).

b. Background information:

L. V. Spencer, "Structure Shielding Against Fallout Radiation from Nuclear Weapons," NBS Monograph 42 (1962).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents (10.a) and one (1.2MB) DOS diskette tape which contains the source code, RTI library tables, input and output for 34 sample problems, and Edited Input Data and Error Table.

12. DATE OF ABSTRACT

May 1969; updated July 1981.

KEYWORDS: CIVIL DEFENSE; FALLOUT; SHELTER SHIELDING; ENGINEERING MANUAL METHOD; GAMMA-RAY; COMPLEX GEOMETRY