CSNI0034 LOBI/A1-04R.
LOBI/A1-04R, Loop for Blowdown Investigation, PWR Double-Ended Cold-Leg Break Test
NAME OR DESIGNATION, COMPUTER, DESCRIPTION OF TEST FACILITY, DESCRIPTION OF TEST, EXPERIMENTAL LIMITATIONS OR SHORTCOMINGS, PHENOMENA TESTED, SPECIAL FEATURES OF EXPERIMENT, COUNTERPART EXPERIMENTS, STATUS, REFERENCES, TEST DESIGNATION, LANGUAGE, ESTABLISHMENT, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| LOBI/A1-04R | CSNI0034/01 | Arrived | 22-MAY-1992 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| CSNI0034/01 | Many Computers |
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3. DESCRIPTION OF TEST FACILITY
The LOBI facility is a 1/700 scale model of a four loop PWR and has two primary loops, the intact loop representing three loops and the broken loop representing one loop of a four-loop PWR. The reactor pressure vessel model contains an electrically heated rod-bundle with 64 rods and a heated length of 3.9 m. The nominal heating power is 5.3 MW. The downcomer is of annular shape. An upper head simulator is connected to the vessel. Each of the two primary loops contains a pump and a steam generator. The different mass flows in the loops are established by the pump speeds, since the two pumps are identical. Heat is removed from the steam generators by a secondary system. ECC water can be supplied from two accumulators, one for each loop. Cold or hot leg as well as combined injection can be simulated.
The LOBI test facility is the only high pressure integral test facility within the European Communities (1982), built and operated in the Joint Research Centre, Ispra, ITALY. In the LOBI experiments the thermal-hydraulic behavior of the facility during a transient, caused by a simulated loss of coolant accident (LOCA), is investigated to provide an experimental basis for analytical model development and code verification.
The LOBI facility is a 1/700 scale model of a four loop PWR and has two primary loops, the intact loop representing three loops and the broken loop representing one loop of a four-loop PWR. The reactor pressure vessel model contains an electrically heated rod-bundle with 64 rods and a heated length of 3.9 m. The nominal heating power is 5.3 MW. The downcomer is of annular shape. An upper head simulator is connected to the vessel. Each of the two primary loops contains a pump and a steam generator. The different mass flows in the loops are established by the pump speeds, since the two pumps are identical. Heat is removed from the steam generators by a secondary system. ECC water can be supplied from two accumulators, one for each loop. Cold or hot leg as well as combined injection can be simulated.
The LOBI test facility is the only high pressure integral test facility within the European Communities (1982), built and operated in the Joint Research Centre, Ispra, ITALY. In the LOBI experiments the thermal-hydraulic behavior of the facility during a transient, caused by a simulated loss of coolant accident (LOCA), is investigated to provide an experimental basis for analytical model development and code verification.
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4. DESCRIPTION OF TEST
The Test A1-04R was the last test in the power ascension series of the main LOBI experimental programme A1.
In A1-04R a double-ended cold-leg break between primary pump and pressure vessel with intact loop cold leg ECC injection was simulated. ECC was injected through accumulator of intact loop into cold leg. The pressurizer was connected to the intact loop.
At break initiation, the core power stayed at 5.12 MW (100%) during 3.2 seconds and was then stepwise reduced and reached zero at 50 seconds.
The Test A1-04R was the last test in the power ascension series of the main LOBI experimental programme A1.
In A1-04R a double-ended cold-leg break between primary pump and pressure vessel with intact loop cold leg ECC injection was simulated. ECC was injected through accumulator of intact loop into cold leg. The pressurizer was connected to the intact loop.
At break initiation, the core power stayed at 5.12 MW (100%) during 3.2 seconds and was then stepwise reduced and reached zero at 50 seconds.
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CSNI0034/01, included references:
- E. Ohlmer, T. Fortescue, W. Kolar and J. Eder:Experimental Data Report on LOBI Test A1-04R
ISPRA Communication No. 3803, 1981
- L. Piplies and W. Kolar:
Quick Look Report on LOBI Test A1-04R
ISPRA LQC 80-03 Communication No. 3802, December 1980
- H. Staedke:
Test Prediction for LOBI TEST A1-04R
ISPRA LPC 81-03 Communication No. 3808, April 1981
- W. Kolar and W. Brewka:
LOBI Experimental Data Tape - Format Description
Technical Note No.I.06.C1.85.49 (May 1985)
- LOBI Project - RELAP5 Base Input Data for LOBI-MOD2
LPC 85-18 (February 1985)
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Keywords: blowdown, data, loss-of-coolant accident, transients.