Nuclear power station. Irradiated area, remotely controlled machine. Tapping of sleeves on heater rods of pressurizer. Tapping is carried out to insert a threaded plug in order to isolate the interior of the heater rod. This plug can be welded in place if required. Design of an external clamping machine to work in a space envelope of 180 mm. - Tap rotation via pneumatic motor. -Tap feed via pneumatic actuator. Setting up to work and supervision of tapping are remotely controlled. 1. Screw tap rotation. 2. Tap engagement in heater rod. 3. Limit sensing and stop control of actuator feed. 4. Free feed of screw tap. 5. Limit sensing and final disengagement of tap through the pneumatic actuator. 6. Limit sensing and final disengagement of tap through the pneumatic actuator. 7. Motor stop in correct position for machine release. 8. Tapping carried out : M 24 x 100. stainless steel without lubrication.
TAPPING MACHINE FOR THE REPLACEMENT OF HEATER RODS WSPE-DB0063
- TAPPING MACHINE FOR THE REPLACEMENT OF HEATER RODS