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CSNI0050 FIX-II/3061.

FIX-II/3061, BWR FIX-II Pump Trip Experiment 3061, Large Split Break

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1. NAME OR DESIGNATION:  FIX-II/3061.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
FIX-II/3061 CSNI0050/01 Arrived 23-SEP-1992

Machines used:

Package ID Orig. computer Test computer
CSNI0050/01 Many Computers
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3. DESCRIPTION OF TEST FACILITY

The FIX-II facility is a volume scaled 1:777 representation of a Swedish BWR with external pumps. The pressure vessel contains a 36 rod full length bundle and a spray condenser at the top to allow steady state operation. The downcomer, bypass channels and guide tube volumes are represented by external piping. The intact loop represents three of the four external reactor loops. The broken loop is constructed such that both guillotine breaks and split breaks may be simulated. The facility is equipped with ADS-simulation, but no ECCS injection are included. The FIX-II loop is also suited to investigate response of pump trips and MSIV closures in internal pump reactors.
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4. DESCRIPTION OF TEST

Test No. 3061 is a simulated large split break. The break area was equal to the scaled down are of one of the four recirculation pipes in the reactor (100 %). The initial power should be equivalent to the average bundle power of the reactor and became here 2.51 MW, i.e. slightly higher.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: EXPERIMENTAL LIMITATIONS OR SHORTCOMINGS
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6. PHENOMENA TESTED

Collapsed level behaviour in downcomer; core thermal hydraulics; void collapse and temperature distribution during pressurization; critical power ratio.
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7. UNUSUAL FEATURES: SPECIAL FEATURES OF EXPERIMENT
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8. RELATED OR AUXILIARY PROGRAMS: COUNTERPART EXPERIMENTS
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9. STATUS
Package ID Status date Status
CSNI0050/01 23-SEP-1992 Arrived at NEADB
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10. REFERENCES

- L. Nilsson, et. al.:
FIX-II LOCA Blowdown and Pump Trip Heat Transfer Experiments,
Experimental Results from Pump Trip Experiments of Test Groups
Nos. 1, 2, 8 (STUDSVIK/NR-83/324)
CSNI0050/01, included references:
- Lars NILSSON et al:
FIX-II - LOCA Blowdown And Pump Trip Heat Transfer Experiments
Experimental results from LOCA test No. 3061 (STUDSVIK/NR-84/487, 1984)
- L. Nilsson, P.-A. Gustavsson:
FIX-II LOCA Blowdown and Pump Trip Heat Transfer Experiments,
Description of Experimental Equipment, Part 1, 2 and 3
(STUDSVIK/NR-83/238, February 1983)
- L. Nilsson, et. al.:
FIX-II LOCA Blowdown and Pump Trip Heat Transfer Experiments,
Topical Report of Phase 4:
Results of Static Dryout Measurements in the 36-Rod Bundle
(STUDSVIK/NR-83/274, 1983)
- L. Nilsson:
FIX-II LOCA Blowdown and Pump Trip Heat Transfer Experiments
Summary Report for the second experimental period (STUDSVIK/NR-85/42)
- R. Persson, L. Nilsson and L. Gustafson:
FIX-II Transient Dryout Tests
Summary Report (STUDSVIK/NP-86/35, March 1986)
- J. Eriksson:
ICAP, Assessment of RELAP5/MOD2, Cycle 36.04 against FIX-II
Guillotine Break Experiment No 5061 (STUDSVIK/NP-86/109, October 1986)
- L. Nilsson:
Transfer of data from FIX-II experiments to OECD/NEA's Databank
for the CSNI Code Validation Matrix (NS-92/58, September 1992)
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11. TEST DESIGNATION:  3061
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12. PROGRAMMING LANGUAGE(S) USED
No specified programming language
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15. ESTABLISHMENT

  Lars NILSSON, Lennart GUSTAFSON, Alf PETTERSSON, Bo STROEM
  Swedish Nuclear Power Inspectorate
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16. MATERIAL AVAILABLE
CSNI0050/01
CCVM data        mag tapeFIX-II LOCA test 3061 results              CVMTP
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17. CATEGORIES
  • Y. Integral Experiments Data, Databases, Benchmarks

Keywords: data, pumps, transients.