CSNI0022 LOFT/L3-5.

1. NAME OR DESIGNATION:  LOFT/L3-5.

3. DESCRIPTION OF TEST FACILITY

The LOFT Integral Test Facility is a scale model of a LPWR.  The intent of the facility is to model the nuclear, thermal-hydraulic phenomena which would take place in a LPWR during a LOCA.  The general philosophy in scaling coolant volumes and flow areas in LOFT was to use the ratio of the LOFT core [50 MW(t)] to a typical LPWR core [3000 MW(t)].  For some components, this factor is not applied; however, it is used as extensively as practical.  In general, components used in LOFT are similar in design to those of a LPWR.  Because of scaling and component design, the LOFT LOCA is expected to closely model a LPWR LOCA.

4. DESCRIPTION OF TEST

This was the fifth in the NRC L3 Series of small-break LOCA experiments. A 10-cm (2.5-in.) cold-leg noncommunicative-break LOCA was simulated. Pumps were shut off. The experiment was conducted on 29 September 1980.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: EXPERIMENTAL LIMITATIONS OR SHORTCOMINGS

6. PHENOMENA TESTED

Phase separation; ECC bypass and penetration; core heat transfer; quench front propagation.

7. SPECIAL FEATURES OF EXPERIMENT:  Only integral research facility with a nuclear core.

8. RELATED OR AUXILIARY PROGRAMS: COUNTERPART EXPERIMENTS

- Leanne Thuy Lien Dao and Janice M. Carpenter
  Experiment Data Report for LOFT Nuclear Small Break
Experiment L3-5/L3-5A, NUREG/CR-1695 EGG-2060 (November 1980)
- Charles L. Nalezny:
Summary of Nuclear Regulatory Commission's
LOFT Program Experiments
NUREG/CR-3214 - EGG-2248 (July 1983)
- Charles L. Nalezny:
Summary of Nuclear Regulatory Commission's
LOFT Program Research Findings
NUREG/CR-3005 - EGG-2231 (April 1985)
- D.L. Reeder:
LOFT System and Test Description
NUREG/CR-0247 (TREE-1208) July 1978.
- J. Fell and S.M. Modro:
An Account of the OECD LOFT Project
OECD LOFT-T-3907 May 1990.
- Technical Considerations for LOFT Consortium Test Plan,
Prepared for discussion by LOFT Consortium Working Group Meeting
Munich, Germany, July 15-16, 1982 (SEN/LOFT(82)6)

11. TEST DESIGNATION:  L3-5

15. ESTABLISHMENT

        Idaho National Engineering Laboratory
        EG&G Idaho
        Idaho Falls, Idaho 83415.
        U.S.A.

CCVM data        mag tapeDirectory         TOTAL: 116,661,600       CVMTP
CCVM data        mag tapeControl valve              1,005,200       CVMTP
CCVM data        mag tapeComputed parameters       38,276,400       CVMTP
CCVM data        mag tapeDensity                   11,029,040       CVMTP
CCVM data        mag tapeFlow velocity              3,015,600       CVMTP
CCVM data        mag tapeMass flow                  7,037,520       CVMTP
CCVM data        mag tapeLevels                     6,031,520       CVMTP
CCVM data        mag tapeMomentum Flux              4,021,360       CVMTP
CCVM data        mag tapeNeutron detector           3,016,080       CVMTP
CCVM data        mag tapeDifferential pressure     14,073,760       CVMTP
CCVM data        mag tapePressure                  29,155,120       CVMTP
CCVM data        mag tapeDirectory         TOTAL:  80,428,320       CVMTP
CCVM data        mag tapePower                      3,016,080       CVMTP
CCVM data        mag tapeRotational speed           2,010,720       CVMTP
CCVM data        mag tapeTemperature part 1        75,401,520       CVMTP
CCVM data        mag tapeDirectory         TOTAL:  64,342,880       CVMTP
CCVM data        mag tapeTemperature part 2        64,342,880       CVMTP