CSNI0023 SEMISCALE/S-IB-3.

1. NAME OR DESIGNATION:  SEMISCALE/S-IB-3.

3. DESCRIPTION OF TEST FACILITY

The Semiscale Mod-2A system used for this test was designed as a smallscale model of the primary system of four loop PWR nuclear generating plant. consists of a pressure v  internals, including a 25-rod core with electrically powered rods and an external downcomer assembly; an intact loop with pressurizer, steam generator, pump, and rupture disc assembly. It is scaled to simulate the three intact loops in a PWR. The broken loop simulates the single loop in which a break is postulated to occur in a PWR. The system also has emergency core cooling for the intact loop from high- and low-pressure injection pumps, a coolant injection accumulator for the intact loop, and a pressure suppression system with steam supply and pressure suppression tank. Twenty-three rods of the 25-rod core were powered equally with a power density of 26.51 kW/m. The total core power for Test S-IB-3 was 1.45 MW.

4. DESCRIPTION OF TEST

This test was a 21.7%, communicative, cold leg break loss-of-coolant experiment with ECC injection. The test was intended to provide reference data for comparison of Semiscale test results to result from LOBI test B-R1M. The test was also intended to provide reference data for evaluation and assessment of reactor safety code capabilities to predict integral blowdown, refill/reflood experiments for intermediate break sizes, and particularly for providing data to extend the code into the reflood regime. Particular emphasis was placed on providing extensive core fluid and heater rod measurements to facilitate this development.

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

6. PHENOMENA TESTED

Natural circulation in 1- and 2-phase flow; core thermohydraulics; 1- and 2-phase pump behaviour.

7. UNUSUAL FEATURES: SPECIAL FEATURES OF EXPERIMENT

8. COUNTERPART EXPERIMENTS:  LOBI test B-R1M.

- G.G. Loomis:
  Summary Report Semiscale Mod-2A Heat Loss Characterization Test Series
  EGG-SEMI-5448 (May 1981)
- E.M. Feldman and D.J. Olson:
  Semiscale Mod-1 Program and System Description for the Blowdown
  Heat Transfer Tests (ANCR-1230, August 1975)
- R.T. French:
  An Evaluation of Piping Heat Transfer Piping Flow Regimes,
  and Steam Generator Heat Transfer for the Semiscale Mod-1
  Isothermal Tests (ANCR-1229, August 1975)
- M.T. Leonard:
  RELAP5 Standard Model Description for the Semiscale Mod-2A System
  EGG-SEMI-5692 (December 1981)
- D.W. Golden:
  Steady State Control Model for the Standard RELAP5 Semiscale
  Mod-2A System Model
  RE-A-82-023 (April 1982)
- G.G. Loomis:
  Summary of the Semiscale Program (1965-1986)
  NUREG/CR-4945 - EGG-2509 (July 1987)
- John S. Martinelli:
  "Semiscale Loss-of-Power Test Results"
  11th Water Reactor Safety Research Information Meeting,
  October 24-28, 1983
  ECC-M-22283 Preprint
- L.J. Ball et al.:
  Semiscale Program Description (TREE-NUREG-1210, May 1987)
- T.J. Boucher and M.T. Leonard:
  "Quick Look Report for Semiscale Intermediate Break Test S-IB-3"
  EGG-SEMI-6013, August 1982
- K.E. Sackett and L/B/ Clegg:
  "Experiment Data Report for Semiscale MOD-2A Intermediate Break Test Series
(Test S-IB-3)"   NUREG/CR-2738 and EGG-2198, June 1982
- T.J. Boucher:
  "Experiment Operating Specification for Semiscale MOD-2A Experiment S-IB-3"
  EGG-SEMI-5787, February 1982

11. TEST DESIGNATION:  S-IB-3

15. ESTABLISHMENT

      T.J. Boucher, M.T. Leonard
      Idaho National Engineering Laboratory
      Idaho Falls, Idaho, U.S.A.

CCVM data        mag tapeDirectory          TOTAL: 5,025,120        CVMTP
CCVM data        mag tapeCurrent                      45,120        CVMTP
CCVM data        mag tapeComputed parameters         553,440        CVMTP
CCVM data        mag tapeDensity                     486,080        CVMTP
CCVM data        mag tapeForce                       180,480        CVMTP
CCVM data        mag tapeFlows                       240,640        CVMTP
CCVM data        mag tapeDifferential pressure       812,160        CVMTP
CCVM data        mag tapePressure                    315,680        CVMTP
CCVM data        mag tapePower                        60,320        CVMTP
CCVM data        mag tapeRotational speed             30,080        CVMTP
CCVM data        mag tapeTemperature               2,256,000        CVMTP
CCVM data        mag tapeVoltage                      45,120        CVMTP
CCVM data        mag tapeValve position               45,600        CVMTP