NESC0268 TRANS-FUGUE-1.
TRANS-FUGUE-1, Single Channel 2 Phase Flow Heat Transfer after Boiling
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, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| TRANS-FUGUE-1 | NESC0268/01 | Tested | 01-SEP-1968 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NESC0268/01 | IBM 7090 | IBM 7090 |
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3. NATURE OF PHYSICAL PROBLEM SOLVED
TRANS-FUGUE1 is a transient single channel, two-phase flow, and heat transfer code for analysis of postulated reactor incidents involving boiling. The code is based on a homogeneous hydrodynamic model which assumes equal phase temperatures and velocities. It assumes vapor generation to be heat transfer limited only, and calculates axial distribution of velocity, void fraction, pressure, coolant temperature, and fuel temperature. Transients simulating power excursions, loss of flow, loss of pressure and channel plugging can be studied.
TRANS-FUGUE1 is a transient single channel, two-phase flow, and heat transfer code for analysis of postulated reactor incidents involving boiling. The code is based on a homogeneous hydrodynamic model which assumes equal phase temperatures and velocities. It assumes vapor generation to be heat transfer limited only, and calculates axial distribution of velocity, void fraction, pressure, coolant temperature, and fuel temperature. Transients simulating power excursions, loss of flow, loss of pressure and channel plugging can be studied.
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4. METHOD OF SOLUTION
Each transient starts from some steady-state condition derived from input parameters. One of these selected by the user varies with time and the program calculates the response of the system to this driving function. The heat balance equations are solved by use of finite difference techniques and the momentum equation is derived assuming constant vapor density and saturation temperature, eliminating pressure feedback. Numerical instabilities resulted when attempts were made to remove these limitations. The code is set up to provide use of a smaller time-step for the momentum equation than that used for the heat balance and mass equations if requested.
Each transient starts from some steady-state condition derived from input parameters. One of these selected by the user varies with time and the program calculates the response of the system to this driving function. The heat balance equations are solved by use of finite difference techniques and the momentum equation is derived assuming constant vapor density and saturation temperature, eliminating pressure feedback. Numerical instabilities resulted when attempts were made to remove these limitations. The code is set up to provide use of a smaller time-step for the momentum equation than that used for the heat balance and mass equations if requested.
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NESC0268/01
| File name | File description | Records |
|---|---|---|
| NESC0268_01.001 | INFORMATION | 1 |
| NESC0268_01.002 | SOURCE & DATA 7090/F2 | 1890 |
| NESC0268_01.003 | OUTPUT | 2264 |
Keywords: accidents, fluid flow, heat transfer, hydrodynamics, liquids, vapors.