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PSR-0375 COGAP.

COGAP, Nuclear Power Plant Containment Hydrogen Control System Evaluation Code

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1. NAME OR DESIGNATION OF PROGRAM:  COGAP.
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2. COMPUTERS
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Program name Package id Status Status date
COGAP PSR-0375/01 Arrived 23-SEP-2008

Machines used:

Package ID Orig. computer Test computer
PSR-0375/01 CDC 1604,CDC CYBER 175,PC Windows
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3. DESCRIPTION OF PROGRAM OR FUNCTION

COGAP evaluates nuclear power plant containment hydrogen control systems by determining the node (compartment) concentrations of hydrogen, oxygen, nitrogen, and steam, assumed to be ideal gases. The nodes are assumed to behomogeneous and in chemical equilibrium, that is, lumped-parameter nodes. Effects accounted for include: reaction of zirconium and water; radiolysis of core and sump water; corrosion of zinc, aluminum, and copper; recirculation between compartments; hydrogen recombiners; purging; nitrogen addition; and atmospheric steam. Controls are available to determine when options are initiated, e.g., hydrogen recombiners can be started when the hydrogen concentration reaches a user-specified value or after a user-specified time.
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4. METHODS

Nodal gas content accounting is determined explicitly, based on addition, removal, or transport of constituents resulting from the effects considered.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of 20 hydrogen recombiner connections, 20 connections between compartments for recirculation, 10 corrosion surfaces, and 5 compartments.
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6. TYPICAL RUNNING TIME

The sample problem, which includes two cases, required about 6 CP seconds on a CDC7600 and 16 CP seconds on a CDC CYBER175. The sample problem requires just a few seconds on a Micron P3 650 mHz 128MB Ram running Windows 2000.
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9. STATUS
Package ID Status date Status
PSR-0375/01 23-SEP-2008 Masterfiled Arrived
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10. REFERENCES
PSR-0375/01, included references:
- R.G. Gido:
"COGAP: A Nuclear Power Plant Containment Hydrogen Control System Evaluation
Code," NUREG/CR-2847 (LA-9459- MS) (January 1983)
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11. HARDWARE REQUIREMENTS

COGAP runs on Intel personal computers. 55,000 (octal) words of memory were required for CDC7600 execution; the CDC CYBER175 required 36,000 (octal) words.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
PSR-0375/01 FORTRAN
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13. SOFTWARE REQUIREMENTS

The CDC version was developed under SCOPE 2.1 (CDC7600); NOS 1.4 (CDC CYBER175). It was not modifed or tested at RSICC and is
retained for completeness. The included PC executables were created on a Dell PII-366 Laptop running windows 2000 using the Compaq Visual Fortran Version 6.5. The PC code runs under Windows 95, 98 or Windows 2000.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, USA
Developed by:   Los Alamos National Laboratory, New Mexico, USA
                Exelon Nuclear, Kennett Square, Pennsylvania, USA
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16. MATERIAL AVAILABLE
PSR-0375/01
source code
readme files
PC executable
test problems
output
electronic document
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17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis

Keywords: concentration, containment, hydrogen, nitrogen, oxygen, steam.