OLM is an underwater manipulator designed for the visual inspection of the IRWST (in-containment refueling water storage tank).

Key Features

  • 4 OLM configurations allow it to test under or above water depending on the water level in IRWST
  • Modular construction allows quick and easy configuration changes
  • OLM consists of the following parts:
    • 6 thrusters for movement
    • 2 surveillance cameras that allow the operator to navigate in space
    • LED lighting - visual inspection cameras that provide insight into the state of the IRWST and its components
    • A gripper used to remove any debris from the IRWST
    • A power cord that floats and thus allows unimpeded movement through the water


  • Power supply: 200/250 VAC, 50/60 Hz
  • Air supply: 6 bar
  • Operating voltage: 48 VDC
  • Manipulator weight: 45 kg
  • Main cable length: 50 m
  • Main cable weight: 42 kg
  • Manipulator stand: 29 kg
  • Video system for complete VT inspection
    • Cameras with integrated lighting and pan and tilt function
  • Additional lighting - marine lights
  • Foreign material retrieval with special clamp tool

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