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NESC0268 TRANS-FUGUE-1.

TRANS-FUGUE-1, Single Channel 2 Phase Flow Heat Transfer after Boiling

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1. NAME OR DESIGNATION OF PROGRAM:  TRANS-FUGUE-1.
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2. COMPUTERS
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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.
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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.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:  Maximum of - 100 spatial nodes.
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6. TYPICAL RUNNING TIME:  2 to 4 minutes are required for an 80-node problem.
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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
NESC0268/01 01-SEP-1968 Tested at NEADB
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10. REFERENCES

- R.C. Noyes, J.G. Morgan, and H.H. Cappel:
  Trans-FUGUE-I, A Digital Code for Transient Two-Phase Flow and
  Heat Transfer
  NAA-SR-11008 (July 1965).
- M. Hoffman and W.A. Rhoades:
  AICRT3, A General Code for Display of Digital Data
  NAA-SR-MEMO-9069 (October 1963).
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11. MACHINE REQUIREMENTS:  32k memory
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0268/01 FORTRAN-II (IBM)
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  Standard IBM FORTRAN monitor.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

If an SC-4020 graphical display device is available, AICRT3 and the NAA SC-4020 package are available through

UAIDE Librarian
                      c/o Stromberg-Carlson
                      P. O. Box 2449
                      San Diego, California, U. S. A.
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15. NAME AND ESTABLISHMENT OF AUTHOR

                 R. C. Noyes, J. G. Morgan, and H. H. Cappel
                 Atomics International
                 P. O. Box 309
                 Canoga Park, California U. S. A.
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16. MATERIAL AVAILABLE
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
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17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis

Keywords: accidents, fluid flow, heat transfer, hydrodynamics, liquids, vapors.