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NEA-0946 CONDN-63B.

CONDN-63B, Thermohydraulics of Nuclear Power Plant Condenser

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1. NAME OR DESIGNATION OF PROGRAM:  CONDN-63B.
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2. COMPUTERS
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Program name Package id Status Status date
CONDN-63B NEA-0946/01 Tested 19-NOV-1985

Machines used:

Package ID Orig. computer Test computer
NEA-0946/01 GOULD-SEL 32/55 DEC VAX 11/780
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3. DESCRIPTION OF PROBLEM OR FUNCTION

The program models the thermo-  hydraulic performances of a nuclear power plant condenser. The main  features of the model are:

(a) The program is a real time simulation oriented module. It is included in a package that models the integrated performances of a BWR nuclear power plant.

(b) The model takes three different elements into account: water, steam and non-condensable gases.

(c) The model considers two phases: saturated steam and non- condensable gases (thermodynamic equilibrium) and a liquid phase. Non-equilibrium between the phases is taken into account.

(d) The model considers energy transfer between phases, with mass transport (flushing, condensation) and without mass transport conduction).

(e) The model considers several mass and energy transfers between system and environment:

- Input from bypass and exhaust turbine (steam and non-condensable   gases), drains, vents, air, and water leaks.

- Output to mechanical vacuum pumps and air ejectors.

- Cooling by circulating water.

(f) The model uses mass conservation equations for the three elements (non-condensable gases, steam, and water), and energy conservation equations for the two phases (gaseous and liquid).
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4. METHOD OF SOLUTION

Because of time restrictions related to the real time application, the program uses the Euler method.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME

The program executes every 0.2 seconds, updating the values of the variables. Each run takes about 5 milli-  seconds.
NEA-0946/01
NEA-DB executed the test case included in this package  on VAX-11/780 in 4 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

The program is designed to be used  in a system that simulates the whole nuclear reactor plant. It is executed under the control of a simulation executive program.
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9. STATUS
Package ID Status date Status
NEA-0946/01 19-NOV-1985 Tested at NEADB
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10. REFERENCES:
NEA-0946/01, included references:
- J.M. Olivares and R.M. Fanegas:
  CONDN-63B, Thermohydraulics of Nuclear Power Plant Condenser:
  User Manual.   (November 2, 1984)
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11. MACHINE REQUIREMENTS

Less than 4K bytes of main storage are required. No special computer hardware is required for the real time configuration.
NEA-0946/01
Main storage requirements on VAX-11/780 are 8192 bytes.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0946/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

Real Time Monitor RTM, standard operating system of SEL computers.
NEA-0946/01
VAX/VMS V3.4
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHOR

     J.L. Cueva
    TECNATOM, S.A.
    San Sebastian de los Reyes (Madrid)
    Spain.
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16. MATERIAL AVAILABLE
NEA-0946/01
File name File description Records
NEA0946_01.003 INFORMATION FILE 38
NEA0946_01.004 CONDN-63B SOURCE PROGRAM 692
NEA0946_01.005 CONDN-63B JCL TO RUN SAMPLE PROBLEM 12
NEA0946_01.006 CONDN-63B SAMPLE PROBLEM INPUT DATA 34
NEA0946_01.007 CONDN-63B SAMPLE PROBLEM PRINTED OUTPUT 430
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17. CATEGORIES
  • H. Heat Transfer and Fluid Flow

Keywords: BWR reactors, condensers, hydraulics, hydrodynamics, thermodynamic properties.