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CSNI1001 MARVIKEN-CFT.

MARVIKEN-CFT, Marviken Full Scale Critical Flow Tests

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1. NAME OR DESIGNATION:  MARVIKEN-CFT, Marviken Full Scale Critical Flow Tests experiments.
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2. COMPUTERS
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Program name Package id Status Status date
MARVIKEN-CFT CSNI1001/02 Arrived 05-MAY-2012

Machines used:

Package ID Orig. computer Test computer
CSNI1001/02 Many Computers
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3. DESCRIPTION

The Marviken Full Scale Critical Flow Tests (CFT) were conducted between mid-1977 and December 1979 as a multinational project at the Marviken Power Station. The 27 CFT experiments, together with the test procedures, equipment, and evaluation techniques are presented in a set of 35 reports. Data describing the nozzle inlet stagnation conditions and mass fluxes are presented.
The tests were conducted by discharging water and steam-water mixtures from a full sized reactor vessel through a large diameter discharge pipe that supplied the flow to the test nozzle. The nine test nozzle geometries all had rounded entrances followed by a nominally 200, 300 or 500 mm constant diameter cross-section. The nozzles ranged in length from 166 to 1809 mm.
Most tests were conducted with a nominal initial steam dome pressure of 5 MPa (4 MPa for one test) and with the water initially subcoo1ed between 50 deg.C and 1 deg.C (with respect to the steam dome pressure). The water oxygen content was approximately the same for all tests, but it was decreased by a factor of 140 with respect to a reference test in order to determine the effect of the water air content on the critical mass flow rate.
The vessel, discharge pipe and nozzle were instrumented to determine the test behaviour and to provide a basis for evaluating the stagnation conditions and mass fluxes at the nozzle inlet. The instrumentation readings were recorded using a pulse code modulation system. Data error limits were evaluated for all measurements.
Using the recorded measurements, changes in the fluid state which occurred while the test fluid flowed from the instrumentation station to the nozzle inlet were examined. The resulting nozzle inlet conditions are presented. The most accurate rates of mass flow through the nozzle were obtained using a pitot-static rake during the subcooled portion of the experiments and by tracing the liquid mass history during the saturated portion of the experiments. The peak mass flow rate measured during the CFT program was 14 Mg/s.
Nozzle pressure profiles showed a pressure recovery zone just downstream of the nozzle inlet during the subcooled test phase and usually a steadily- decreasing pressure during the saturated test phase.
Examination of the subcooled data recorded for the nine nozzle geometries indicates that the different nozzle mass fluxes lie within the CFT program error limits at L/D (length to diameter) ratios greater than 1. 5. However, the mass flux behaviour seems to be dependent on the diameter as well as the length at L/D's less than 1.5. A more clear dependence on length and diameter seems to apply for saturated flow with zero quality. The decrease in the
initial water air content had no observable effect on the nozzle mass flux histories.

The organizations represented were from Denmark, Germany, Finland, France, the Netherlands, Norway, Sweden and the United States.

The official documentation of the project is given in the reports and appendices, the titles of which are listed on the back cover.
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4. METHODS
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
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6. TYPICAL RUNNING TIME
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7. UNUSUAL FEATURES
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8. RELATED OR AUXILIARY PROGRAMS
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9. STATUS
Package ID Status date Status
CSNI1001/02 05-MAY-2012 Masterfiled restricted
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10. REFERENCES
CSNI1001/02, included references:
- Description of the test facility MXC-101 December 1979
- Measurement system MXC-102 December 1979
- Structures of the data tapes MXC-103
- Data processing procedures MXC-104 December 1979
- Data accuracy MXC-105
- Evaluation methods MXC-106
- Blowdown 17 results MXC-217, and appendix MXC-217 App
- Blowdown 18 results MXC-218, and appendix MXC-218 App
- Blowdown 19 results MXC-219, and appendix MXC-219 App
- Blowdown 20 results MXC-220, and appendix MXC-220 App
- Blowdown 21 results MXC-221, and appendix MXC-221 App
- Blowdown 22 results MXC-222, and appendix MXC-222 App
- Blowdown 23 results MXC-222, and appendix MXC-223 App
- Blowdown 24 results MXC-222, and appendix MXC-224 App
- Blowdown 25 results MXC-222, and appendix MXC-225 App
- Summary report MXC-301 December 1979
- Report abstracts MXC-401 December 1979
- Conclusions MXC-402 December 1979
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11. HARDWARE REQUIREMENTS
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12. PROGRAMMING LANGUAGE(S) USED

No item found

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15. ESTABLISHMENT:
Studsvik Eco & Safety AB
S-611 82 Nykoeping
SWEDEN
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16. MATERIAL AVAILABLE
CSNI1001/02
Data files
Electronic documentation
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17. CATEGORIES
  • Y. Integral Experiments Data, Databases, Benchmarks

Keywords: data, evaporation model, flow models.