CSNI0035 LOBI/A1-06.
LOBI/A1-06, Loop for Blowdown Investigation, PWR Double-Ended 2A Cold-Leg Break
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
[ top ]
[ top ]
To submit a request, click below on the link of the version you wish to order.
Only liaison officers are authorised to submit online requests. Rules for requesters are
available here.
| Program name | Package id | Status | Status date |
|---|---|---|---|
| LOBI/A1-06 | CSNI0035/01 | Arrived | 22-MAY-1992 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| CSNI0035/01 | Many Computers |
[ top ]
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.
[ top ]
4. DESCRIPTION OF TEST
The Test A1-06 is one of a series of three LOBI tests in which the ECC injection mode was studied. In all experiments, a double-ended 2A break in the cold leg was simulated. The downcomer gap width was 12 mm.
In test A1-06, ECC water was injected from the intact loop accumulator into the hot leg and the cold leg and from the broken loop accumulator into the hot leg only. The pressurizer was connected to the intact loop.
At break initiation, the core power stayed at 5.29 MW (100%) during 2.9 seconds and was then stepwise reduced and reached zero at 30 seconds.
After blowdown initiation, the intact loop pump speed decreased to 71% after 8.0 seconds and remained constant. The broken loop pump speed diminished to 10.4% after 3.0 seconds and reached zero speed after 27.0 seconds.
The Test A1-06 is one of a series of three LOBI tests in which the ECC injection mode was studied. In all experiments, a double-ended 2A break in the cold leg was simulated. The downcomer gap width was 12 mm.
In test A1-06, ECC water was injected from the intact loop accumulator into the hot leg and the cold leg and from the broken loop accumulator into the hot leg only. The pressurizer was connected to the intact loop.
At break initiation, the core power stayed at 5.29 MW (100%) during 2.9 seconds and was then stepwise reduced and reached zero at 30 seconds.
After blowdown initiation, the intact loop pump speed decreased to 71% after 8.0 seconds and remained constant. The broken loop pump speed diminished to 10.4% after 3.0 seconds and reached zero speed after 27.0 seconds.
[ top ]
[ top ]
[ top ]
[ top ]
[ top ]
CSNI0035/01, included references:
- L. Regel and E. Ohlmer:Experimental Data Report on LOBI Test A1-06
ISPRA LEC 82-17, Communication No. 3952, September 1982
- L. Piplies and N. Granner:
Quick Look Report on LOBI Test A1-06
ISPRA LQC 82-15 Communication No. 3955, September 1982
- H. Staedke:
Pre-Test Prediction for LOBI TEST A1-06
ISPRA LPC 82-14 Communication No. 3968, July 1983
- 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)
[ top ]
[ top ]
[ top ]
CSNI0035/01
CCVM data mag tape2A BREAK PUMP-VESSEL, DC 12 MM 4,086KbytesCVMTPKeywords: blowdown, data, loss-of-coolant accident, transients.