1. NAME AND TITLE

FPIP: Fission Product Inventory Code System.

FPIP originated at Westinghouse Astronuclear Laboratory in 1963. The packaged version was revised extensively in 1967 and updated in 1971.

AUXILIARY ROUTINES

FPIPLTG: Library Tape Generator.

FPIP: Product Inventory Calculation.

DATA LIBRARY

FPNL: Fission Product Nuclide Data Library.

2. CONTRIBUTOR

Westinghouse Astronuclear Laboratory, Pittsburgh, Pennsylvania.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; CDC 6600.

4. NATURE OF PROBLEM SOLVED

A calculation of the fission product abundances and beta and gamma-ray source strengths, using information on reactor history and requested decay times after reactor shutdown.

5. METHOD OF SOLUTION

The Library Tape Generator generates and stores in machine language form on the tape required data for input. FPIP calculates the energy contribution from each fission product nuclide in each selected energy grouping, and decay chains and subchains for each nuclide. Fission product abundances and beta and gamma-ray sources are then calculated.

6. RESTRICTIONS OR LIMITATIONS

A maximum of 50 decay time points can be calculated per run. A maximum of 6 separate operating periods can be used to describe the reactor operating history. Output is limited to a maximum of 7 gamma and 5 beta energy groups. The data library accommodates 254 nuclides.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for FPIP.

8. COMPUTER HARDWARE REQUIREMENTS

The code system is operable on the CDC 6600 computer.

9. COMPUTER SOFTWARE REQUIREMENTS

FPIP is designed to run on the CDC 6600 FORTRAN IV compiler.

10. REFERENCE

W. S. Brown and D. W. Call, Revised Fission Product Inventory Program (FPIP- REV), WANL-TME-537, Revision 1 (May 1967).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and a reel of magnetic tape which contains the source codes and sample problem input written in BCD/EBCDIC card images; total records 1530.

12. DATE OF ABSTRACT

June 1972; revised December 1984.