Research programs

CABRI CIP test device

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CABRI CIP Program

The test device

The test device contains the test rod used during the Cabri International Program (CIP) tests. It has been developed by the IRSN to meet the requirements of CIP. It is very complex equipment using numerous advanced technologies, both in terms of instrumentation and mechanical integration.

The test device

CABRI CIP Program

The test device

The test device contains the test rod used during the Cabri International Program (CIP) tests. It has been developed by the IRSN to meet the requirements of CIP. It is very complex equipment using numerous advanced technologies, both in terms of instrumentation and mechanical integration.

Test device of CABRI CIP program

It is a tube 5 meters in length, weighing 140 kg and having an average diameter of approximately 100 mm (80 mm in the experimental area and 140 mm at the head). Its nominal operating conditions are those of the pressurized water loop (155 bar/280°C), but it must also be able to withstand the experimental conditions of the test during the transient (up to 500 bar/350°C).

 

​Test device in TPI company which participated to its construction. Sébastien Pierrisnard is a TPI technician.
(c) Francesco Acerbis / Médiathèque IRSN

Test device of CABRI CIP program

Test device of CABRI CIP program
​Test device in TPI company which participated to its construction. Sébastien Pierrisnard is a TPI technician.
(c) Francesco Acerbis / Médiathèque IRSN

It is a tube 5 meters in length, weighing 140 kg and having an average diameter of approximately 100 mm (80 mm in the experimental area and 140 mm at the head). Its nominal operating conditions are those of the pressurized water loop (155 bar/280°C), but it must also be able to withstand the experimental conditions of the test during the transient (up to 500 bar/350°C).

 

​From the center to the outside, it includes the channel tube containing the test rod, a gaseous gap and the pressure tube. The gap between the pressure tube and the pressurized water cell is known as the bypass. The water flow of the pressurized water loop entering the pressurized water cell is divided between the channel tube, for circulation around the test rod, and the bypass, around the pressure tube of the test device. The ratio between the two flowrates is 3, which is maintained by a pressure drop ring located in the upper part of the test device.

 

Distribution of the pressurized water flowrate in the test 

​Cleaning of the device by S. Pierrisnard before its insertion in the system where hot leaktightness tests will be carried out, in TPI company.
(c) Francesco Acerbis / Médiathèque IRSN
​Cleaning of the device by S. Pierrisnard before its insertion in the system where hot leaktightness tests will be carried out, in TPI company.
(c) Francesco Acerbis / Médiathèque IRSN

​From the center to the outside, it includes the channel tube containing the test rod, a gaseous gap and the pressure tube. The gap between the pressure tube and the pressurized water cell is known as the bypass. The water flow of the pressurized water loop entering the pressurized water cell is divided between the channel tube, for circulation around the test rod, and the bypass, around the pressure tube of the test device. The ratio between the two flowrates is 3, which is maintained by a pressure drop ring located in the upper part of the test device.

 

Distribution of the pressurized water flowrate in the test 

​The instrumentation embedded in the test device is quite specific (sometimes one of a kind) that meets very tough constraints (high accuracy and very short response time, capable of withstanding the severe use conditions of the device, and mechanical integration in a limited space), and required several years of development.

 

​Device inserting in the system where hot leaktightness tests will be carried out in TPI company.
(c) Francesco Acerbis / Médiathèque IRSN
​Device inserting in the system where hot leaktightness tests will be carried out in TPI company.
(c) Francesco Acerbis / Médiathèque IRSN

​The instrumentation embedded in the test device is quite specific (sometimes one of a kind) that meets very tough constraints (high accuracy and very short response time, capable of withstanding the severe use conditions of the device, and mechanical integration in a limited space), and required several years of development.

 

​The main contents of the test device:

Some thirty temperature measurements using the thermocouple (measurement of fluid, fuel rod cladding, equipment and structures),

 

 Instrumented cage and thermocouple

4 flowmeters: two for nominal measurements (0-2 m3/h) and two for transient measurements (2-10 m3/h),
 
 
2 microphones for detecting cladding failure,6 pressure sensors indicate the absolute pressure and measure transient flowrates. They are also used to measure the pressure peak generated by the interaction between the hot fuel and water,

 

Pressure sensor

1 sensor for axial elongation of the test rod,4 detectors of any boiling in the reactor coolant around the test rod during the transient. 
​Devices to test pressure sensors leaktightness.
(c) Francesco Acerbis / Médiathèque IRSN
​Devices to test pressure sensors leaktightness.
(c) Francesco Acerbis / Médiathèque IRSN

​The main contents of the test device:

Some thirty temperature measurements using the thermocouple (measurement of fluid, fuel rod cladding, equipment and structures),

 

 Instrumented cage and thermocouple

4 flowmeters: two for nominal measurements (0-2 m3/h) and two for transient measurements (2-10 m3/h),
 
 
2 microphones for detecting cladding failure,6 pressure sensors indicate the absolute pressure and measure transient flowrates. They are also used to measure the pressure peak generated by the interaction between the hot fuel and water,

 

Pressure sensor

1 sensor for axial elongation of the test rod,4 detectors of any boiling in the reactor coolant around the test rod during the transient. 

Integration of this instrumentation required specific technologies such as  nicrobrazed passages (which ensure leaktightness between the instrument cable and test device structures), high temperature connection units (type of high tech electrical screw connectors able to withstand 300°C) and the electrical connectors for 160 contacts over a 100 mm diameter). Finally, for some of them, special electronics had to be developed.

Instrumentation on lower part of the device

Instrumentation on upper part of the device

​Device inserting for its hot leaktightness test in TPI company.
(c) Francesco Acerbis / Médiathèque IRSN
​Device inserting for its hot leaktightness test in TPI company.
(c) Francesco Acerbis / Médiathèque IRSN

Integration of this instrumentation required specific technologies such as  nicrobrazed passages (which ensure leaktightness between the instrument cable and test device structures), high temperature connection units (type of high tech electrical screw connectors able to withstand 300°C) and the electrical connectors for 160 contacts over a 100 mm diameter). Finally, for some of them, special electronics had to be developed.

Instrumentation on lower part of the device

Instrumentation on upper part of the device

Facility steps until the test

The device -finalized in TPI company - is packed to be transported to CABRI reactor building. Romain Garrigue is engineer in IRSN's experimental equipment development laboratory (LR2E).
(c) Gilles Bertin-Maghit / IRSN

Facility steps until the test

Facility steps until the test
The device -finalized in TPI company - is packed to be transported to CABRI reactor building. Romain Garrigue is engineer in IRSN's experimental equipment development laboratory (LR2E).
(c) Gilles Bertin-Maghit / IRSN
​Device arrival at the entrance of CABRI reactor hall.
(c) Gilles Bertin-Maghit / IRSN
​Device arrival at the entrance of CABRI reactor hall.
(c) Gilles Bertin-Maghit / IRSN
​Unpacking of the device in the reactor hall and inspection by Christelle Manenc, CABRI CIP project manager in IRSN's L2EP.
(c) Gilles Bertin-Maghit / IRSN
​Unpacking of the device in the reactor hall and inspection by Christelle Manenc, CABRI CIP project manager in IRSN's L2EP.
(c) Gilles Bertin-Maghit / IRSN
Device handling to put it in the storage pool.
(c) Gilles Bertin-Maghit / IRSN
Device handling to put it in the storage pool.
(c) Gilles Bertin-Maghit / IRSN
​​Device inserting in its storage container.
(c) Gilles Bertin-Maghit / IRSN
​​Device inserting in its storage container.
(c) Gilles Bertin-Maghit / IRSN
​​The irradiated fuel rod, which is used during CABRI CIP tests, is inserted into the test device at CEA's LECA laboratory. To make the round trip between LECA and CABRI reactor, the device is placed in CABRI handling cask (in green), which is inserted into a transport shell (in white).
(c) Gilles Bertin-Maghit / IRSN
​​The irradiated fuel rod, which is used during CABRI CIP tests, is inserted into the test device at CEA's LECA laboratory. To make the round trip between LECA and CABRI reactor, the device is placed in CABRI handling cask (in green), which is inserted into a transport shell (in white).
(c) Gilles Bertin-Maghit / IRSN
​Storage containers of CABRI test devices.
(c) Laurent Zylberman / Graphix Images / Médiathèque IRSN
​Storage containers of CABRI test devices.
(c) Laurent Zylberman / Graphix Images / Médiathèque IRSN