CSNI0001 FIX-II/2032.

1. NAME OR DESIGNATION:  FIX-II/2032.

3. DESCRIPTION OF TEST FACILITY

In the FIX-II pump trip experiments, mass flow and power transients were simulated subsequent to a total loss of power to the recirculation pumps in an internal pump boiling water reactor. The aim was to determine the initial power limit to give dryout in the fuel bundle for the specified transient. In addition, the peak cladding temperature was measured and the rewetting was studied.

4. DESCRIPTION OF TEST

Pump trip experiment 2032 was a part of test group 2, i.e. the mass flow transient was to simulate the pump coast down with a pump inertia of 11.3 kg-m**2.  The initial power in the 36-rod bundle was 4.44 MW which gave dryout after 1.4 s from the start of the flow transient.  A maximum rod cladding temperature of 457 degrees C was measured. Rewetting was obtained after 7.6 s.

5. EXPERIMENTAL LIMITATIONS OR SHORTCOMINGS:  No ECCS injection systems.

6. PHENOMENA TESTED

Collapsed level behaviour in downcomer; core thermal hydraulics; void collapse and temperature distribution during pressurization; critical power ratio.

7. SPECIAL FEATURES OF EXPERIMENT

Highlights assessment of a code's capability to predict transient dryout, post dryout clad temperatures and rewet of a high power channel.

8. RELATED OR AUXILIARY PROGRAMS: COUNTERPART EXPERIMENTS

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)

- L Nilsson:
Transfer of Data on Magnetic Tape from FIX-II Pump Trip Test 2032
to CSNI Code Validation Matrix (STUDSVIK NP-88-44, May 1988)
- L. Nilsson:
FIX-II LOCA Blowdown and Pump Trip Heat Transfer Experiments,
Experimental Results from Pump Trip Test No. 2032.
(STUDSVIK/NP-87/61, June 1987)
- 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)

11. TEST DESIGNATION:  Pump Trip Test No. 2032

15. ESTABLISHMENT

        Studsvik Energiteknik
        S-611 82 Nykoping
        SWEDEN

CCVM data        mag tapeLoop parameters           2,046,800 bytes  CVMTP
CCVM data        mag tapeRod cladding temperatures   590,480 bytes  CVMTP