RSICC CODE PACKAGE PSR-397

1. NAME AND TITLE

CONTEMPT4: Code System for PWR & BWR Containment Analysis, Versions MOD5 & MOD6.

2. CONTRIBUTOR

Brookhaven National Laboratory, Upton, New York, through the Energy Science and Technology Software Center, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

CONTEMPT4 MOD 6 FORTRAN; CRAY Y-MP

FORTRAN IV (96%) and COMPASS 1.4 (4%); CDC7600

CONTEMPT4 MOD 5 FORTRAN IV (90%) and BAL (10%); IBM3090

(All are distributed as P00397/MNYCP/00.)

4. NATURE OF PROBLEM SOLVED

CONTEMPT4/MOD6 describes the response of multicompartment containment systems subjected to postulated loss-of-coolant accident (LOCA) conditions. The program can accommodate both pressurized water reactor (PWR) and boiling water reactor (BWR) containment systems. Also, both design basis accident (DBA) and degraded core type LOCA conditions can be analyzed. The program calculates the time variation of compartment pressures, temperatures, and mass and energy inventories due to inter-compartment mass and energy exchange taking into account user-supplied descriptions of compartments, inter-compartment junction flow areas, LOCA source terms, and user-selected problem features. Analytical models available to describe containment systems include models for containment fans and pumps, cooling sprays, heat conducting structures, sump drains, PWR ice condensers, and BWR pressure suppression systems. CONTEMPT4/MOD6 also provides analytical models for hydrogen and carbon monoxide combustion within compartments and energy transfer due to gas radiation to accommodate degraded core type accidents.

5. METHOD OF SOLUTION

Containment thermodynamic conditions of oxygen/nitrogen/hydrogen/carbon monoxide/carbon dioxide/steam/liquid water mixtures are determined by using modularized equation-of-state subroutines, tabulated water properties, and polynomial temperature fits for noncondensible gas properties. The numerics in the code are completely explicit, except for the predictor-corrector technique used to estimate the heat structure effects on compartment conditions, an implicit calculation of junction flow with inertia, and an optional implicit routine for junction flow calculation approaching pressure equilibrium.

6. RESTRICTIONS OR LIMITATIONS

Maxima of 999 lumped parameter compartments and 99 heat conducting structures using a variety of heat, transfer options and boundary conditions.

7. TYPICAL RUNNING TIME

No study was done of running times at RSICC.

8. COMPUTER HARDWARE REQUIREMENTS

MOD 6 CRAY:561,000 and 573,000 (octal) memory words are needed on a Cray Y-MP when using CFT and CFT77, respectively. CalComp or FR80 plotting devices are needed for graphs.

MOD 6 CDC:167,000 (octal) words of memory are required for CONTEMPT4/MOD6 on a CDC CYBER170/875. CalComp or FR80 plotting devices are needed for graphical output.

MOD 5 IBM: Information not available.

9. COMPUTER SOFTWARE REQUIREMENTS

All versions require a Fortran compiler.

MOD 6 CRAY: UNICOS 5.0

MOD 6 CDC: SCOPE 2.1 (CDC7600), NOS 2.4.3 (CDC CYBER170)

MOD 5 IBM: MVS (IBM3090,3033); VM/CMS (IBM4331)

10. REFERENCES

C.C. Lin, C. Economos, J.R. Lehner, and G. Maise, "CONTEMPT4/MOD6: A Multicompartment Containment System Analysis Program," NUREG/CR-4547 BNL-NUREG-51966 (March 1986).

C. C. Lin, "CONTEMPT4/MOD5: An Improvement to CONTEMPT4/MOD5 Multicompartment Containment System Analysis Program for Ice Containment Analysis," NUREG/CR-4001 BNL-NUREG-51824 (September 1984).

C.C. Lin, C. Economos, J.R. Lehner, and G. Maise, K. K. Ng, "CONTEMPT4/MOD4: A Multicompartment Containment System Analysis Program," NUREG/CR-3716 BNL-NUREG-51754 (March 1984).

M. Birgersson, "CONTEMPT4/MOD6, NESC No. 818.CRA1, CONTEMPT4/MOD6 Cray Version Tape Description and Implementation Information," NESC Note 90-38 (January 19, 1990).

M. Birgersson, "CONTEMPT4/MOD6, NESC No. 818.7600, CONTEMPT4/MOD6 CDC Version Tape Description and Implementation Information," NESC Note 90-37 (January 19, 1990).

M. Birgersson, "CONTEMPT4/MOD6, NESC No. 818.3090, CONTEMPT4/MOD5 IBM 3090 Version Tape Description and Implementation Information," NESC Note 87-74 (May 31, 1987).

11. CONTENTS OF CODE PACKAGE

Included are referenced documents and two diskettes with source files and test cases written in self-extracting compressed DOS files.

12. DATE OF ABSTRACT

June 1999.

KEYWORDS: LOCA; CONTAINMENT; THERMAL HYDRAULICS