NEA-0575 STESTA.
STESTA, Steady-State State-Variable Profiles of Thermohydraulic Piping System
NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONTIRO 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 |
|---|---|---|---|
| STESTA | NEA-0575/01 | Tested | 01-FEB-1980 |
| STESTA | NEA-0575/02 | Tested | 28-JUN-1982 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NEA-0575/01 | CDC 7600 | CDC 7600 |
| NEA-0575/02 | IBM 3033 | IBM 3033 |
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3. NATURE OF PHYSICAL PROBLEM SOLVED
STESTA is used to calculate steady-state profiles of the state variables of thermohydraulic piping networks. It can be applied to hydrodynamically or thermodynamically coupled or uncoupled multi-loop complex piping networks, filled with any single-phase or two-phase fluid.
Hydraulic losses are considered, continously as well as resulting from abrupt geometry changes. For the analysis of closed-loop behaviour, the code contains a pump model based on (q,h)- characteristics.
To the IBM version the possibility of specifying the hydraulic dia- meter for the volumes and junctions was added. This enables the treatment of annular sections, bundles of pipes, contracted multiple loops.
STESTA is used to calculate steady-state profiles of the state variables of thermohydraulic piping networks. It can be applied to hydrodynamically or thermodynamically coupled or uncoupled multi-loop complex piping networks, filled with any single-phase or two-phase fluid.
Hydraulic losses are considered, continously as well as resulting from abrupt geometry changes. For the analysis of closed-loop behaviour, the code contains a pump model based on (q,h)- characteristics.
To the IBM version the possibility of specifying the hydraulic dia- meter for the volumes and junctions was added. This enables the treatment of annular sections, bundles of pipes, contracted multiple loops.
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4. METHOD OF SOLUTION
The code considers the thermohydraulic steady-state balance equations for momentum, mass and energy and iterates them for consistent state profiles for pressure, temperature and mass flow, based on boundary values needed for every uncoupled sub-system. Sources and sinks of heat and mass fluxes are also taken into account.
The code considers the thermohydraulic steady-state balance equations for momentum, mass and energy and iterates them for consistent state profiles for pressure, temperature and mass flow, based on boundary values needed for every uncoupled sub-system. Sources and sinks of heat and mass fluxes are also taken into account.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
The present version of STESTA has the following restrictions:
Maximum number of volumes 50
Maximum number of junctions 50
Maximum number of distinct hydrodynamic loops 5
Maximum number of different fluid media 5
Maximum number of different pumps 5
Maximum number of different pump characteristics 5
Any of these restrictions can be extended by internal adaption of the respective DIMENSION statements.
The present version of STESTA has the following restrictions:
Maximum number of volumes 50
Maximum number of junctions 50
Maximum number of distinct hydrodynamic loops 5
Maximum number of different fluid media 5
Maximum number of different pumps 5
Maximum number of different pump characteristics 5
Any of these restrictions can be extended by internal adaption of the respective DIMENSION statements.
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7. UNUSUAL FEATURES OF THE PROGRAM
STESTA was written to calculate the steady-state profiles required by transient programs such as RELAP4 and WHAM. The code allows a free-formatted data input in either 'American' or SI-units and gives extensive input assistance, especially in the case of systematically structured networks.
STESTA was written to calculate the steady-state profiles required by transient programs such as RELAP4 and WHAM. The code allows a free-formatted data input in either 'American' or SI-units and gives extensive input assistance, especially in the case of systematically structured networks.
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| Package ID | Status date | Status |
|---|---|---|
| NEA-0575/01 | 01-FEB-1980 | Tested at NEADB |
| NEA-0575/02 | 28-JUN-1982 | Tested at NEADB |
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NEA-0575/01, included references:
- H.J. Schittke:Input Description for 'STESTA'
17.1.1979. (in German).
NEA-0575/02, included references:
- H.J. Schittke:Input Description for 'STESTA'
17.1.1979. (in German).
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| Package ID | Computer language |
|---|---|
| NEA-0575/01 | FORTRAN-IV |
| NEA-0575/02 | FORTRAN-IV |
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NEA-0575/01
| File name | File description | Records |
|---|---|---|
| NEA0575_01.001 | INFORMATION , JCL | 22 |
| NEA0575_01.002 | SOURCE (F4,EBCDIC) | 3739 |
| NEA0575_01.003 | INPUT DATA FOR S. P. | 26 |
| NEA0575_01.004 | PRINTED OUT OF S. P. | 514 |
NEA-0575/02
| File name | File description | Records |
|---|---|---|
| NEA0575_02.003 | STESTA INFORMATION FILE | 63 |
| NEA0575_02.004 | STESTA, SOURCE CARD IMAGES (FORTRAN-4) | 3919 |
| NEA0575_02.006 | STESTA, INPUT FOR SAMPLE CASE | 34 |
| NEA0575_02.007 | STESTA, PRINTED OUTPUT OF SAMPLE CASE | 724 |
| NEA0575_02.008 | STESTA, JCL TO RUN SAMPLE CASE | 69 |
Keywords: fluid flow, hydraulics, iterative methods, pipes, reactor safety, steady-state conditions, thermodynamics.