CSNI0029 TLTA/6431.

1. NAME OR DESIGNATION:  TLTA/6431.

3. DESCRIPTION OF TEST FACILITY

The Two-Loop-Test-Apparatus (TLTA) is a 1:624 volume scaled BWR/6 simulator. It was the predecessor of the better-scaled FIST facility. The facility is capable of full BWR system pressure and has a simulated core with a full size 8 x 8, full power single bundle of indirect electrically heated rods. All major BWR systems are simulated including lower plenum, guide tube, core region (bundle and bypass), upper plenum, steam separator, steam dome, annular downcomer, recirculation loops and ECC injection systems. The fundamental scaling consideration was to achieve real-time response. A number of the scaling compromises present in TLTA were corrected in the FIST configuration. These compromises include a number of regional volumes and component elevations.

4. DESCRIPTION OF TEST

64.45 sqcm small break LOCA with activation of the full emergency core cooling system, but without activation of the automatic decompression system.

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

6. PHENOMENA TESTED

Channel bypass axial flow and void distribution; ore heat transfer; quench front propagation for both fuel rods and channel walls; guide tube and lower plenum flashing; mixture level in core.

7. UNUSUAL FEATURES: SPECIAL FEATURES OF EXPERIMENT

8. RELATED OR AUXILIARY PROGRAMS: COUNTERPART EXPERIMENTS

- L. S. Lee, G. L. Sozzi, S. A. Allison: BWR Large Break Simulation Tests - BWR
Blowdown/Emergency Core Cooling Program Volume 1
NUREG/CR-2229 April 1982

11. TEST DESIGNATION:  6431

15. ESTABLISHMENT

      Idaho National Engineering Laboratory
      Idaho Falls, Idaho, U.S.A.

CCVM data        mag tapeDirectory         TOTAL: 20,229,120        CVMTP
CCVM data        mag tapeCurrent                      66,400        CVMTP
CCVM data        mag tapeDensity                   1,693,200        CVMTP
CCVM data        mag tapeEnergy                      265,600        CVMTP
CCVM data        mag tapeMass flow                   697,200        CVMTP
CCVM data        mag tapeLevels                      365,200        CVMTP
CCVM data        mag tapeMass                        265,600        CVMTP
CCVM data        mag tapeDifferential pressure     2,290,800        CVMTP
CCVM data        mag tapePressure                    265,600        CVMTP
CCVM data        mag tapePeak clad temperature        70,720        CVMTP
CCVM data        mag tapePower                        66,400        CVMTP
CCVM data        mag tapeRHOF                      1,294,800        CVMTP
CCVM data        mag tapeRHOG                      1,261,600        CVMTP
CCVM data        mag tapeRHOL                      1,261,600        CVMTP
CCVM data        mag tapePump rpm                     99,600        CVMTP
CCVM data        mag tapeTemperature               3,604,000        CVMTP
CCVM data        mag tapeSaturation temperature    1,261,600        CVMTP
CCVM data        mag tapeVoltage                      66,400        CVMTP
CCVM data        mag tapeValve position              199,200        CVMTP