NEA-0250 LUPO.
LUPO, Temperature and Void Rate and Pressure Drop and Flow Rate in Pressure Loop
NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, AUXILIARIES, STATUS, REFERENCES, REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES
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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.
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.
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.
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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NEA-0250/01
| File name | File description | Records |
|---|---|---|
| NEA0250_01.001 | SOURCE & DATA 360/65 | 1186 |
| NEA0250_01.002 | OUTPUT | 403 |
Keywords: coolant loops, energy transfer, flow rate, heat transfer, hydraulics, mass transfer, one-dimensional, pressure gradients, pwr reactors, temperature, velocity.