last modified: 01-FEB-1968 | catalog | categories | new | search |

NEA-0250 LUPO.

LUPO, Temperature and Void Rate and Pressure Drop and Flow Rate in Pressure Loop

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1. NAME OR DESIGNATION OF PROGRAM:  LUPO.
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2. COMPUTERS
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Program name Package id Status Status date
LUPO NEA-0250/01 Tested 01-FEB-1968

Machines used:

Package ID Orig. computer Test computer
NEA-0250/01 IBM 360 series IBM 360 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

LUPO is a digital computer programme for predicting steady-state bulk fluid temperature, void fraction, pressure drops and mass flow rate in a closed pressurized  water loop, operating at forced or natural circulation. The model treats the one-dimensional transfer of mass, momentum and energy throughout the whole liquid, subcooled boiling and bulk boiling regions of the coolant.
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4. METHOD OF SOLUTION

Variations in heat transfer and hydraulic characteristics of the coolant due to changes in temperature and state are handled by continuously calculating local values of thermodynamic and physical properties. Semiempirical heat transfer and pressure drop correlations developed by other investigators are  used. The representation of subcooled boiling is based upon the model of Bowring.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The programme allows  the representation of a test-section, a riser, an heat-exchanger and a cold leg. Five localized pressure drop coefficients may be specified. The maximum number of lumps in the test-section is 250. The maximum number of lumps in the riser is 100.
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6. TYPICAL RUNNING TIME:  10 seconds.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS
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9. STATUS
Package ID Status date Status
NEA-0250/01 01-FEB-1968 Tested at NEADB
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10. REFERENCES

- G. Gaggero, B. Panella:
  LUPO - A Program for Prediction of Steady-State Temperature, Flow Rate and Pressure Drops in a Closed Pressurized Water Loop With or Without Boiling
  EUR 3643E (1967).
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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0250/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  OS 360/65.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHOR

G. Gaggero
         Commission des Communautes Europeennes
         Establissement Ispra / CETIS
         21020 - Ispra (Varese)
         Italy

         B. Panella
         Istituto Impianti Nucleari
         Politecnico
         10100 - Torino
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16. MATERIAL AVAILABLE
NEA-0250/01
File name File description Records
NEA0250_01.001 SOURCE & DATA 360/65 1186
NEA0250_01.002 OUTPUT 403
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17. CATEGORIES
  • H. Heat Transfer and Fluid Flow

Keywords: coolant loops, energy transfer, flow rate, heat transfer, hydraulics, mass transfer, one-dimensional, pressure gradients, pwr reactors, temperature, velocity.