Mantis cleaning and inspection capabilities

  • Core spray sparger components, outer diameter bolting, piping components, LPCI
  • All feedwater components
  • Top guide/shroud rim welds, aligner pins, hold-down bolting, FOSAR, shroud inner and outer diameter
  • Jet pump
  • Numerous attachments:
    • Water washing
    • Deep in-vessel examination (DIVE) tool
    • Over the core (OtC) tool
    • Over the dryer tool

Overwatch multi-purpose tooling solution

Uses two multi-axis robotic arms mounted on the reactor pressure vessel (RPV) guide rods to perform core verification, visual inspections, and water washing cleaning activities.

The technology is built to compliment GEH’s current fourth generation remote data acquisition transfer and analysis (RDATA) software architecture using high-definition (HD) cameras mounted on the end of the arm.


Overwatch benefits

  • Dose savings—control and view inspections from outside containment
  • Critical path savings—enables exams to be performed simultaneously with other activities
  • Wireless HD video transmission
  • Permanent HD digital record
  • No 360° platform needed
Service catalog

Learn more about GEH’s available NDE/ISI services

Automated/encoded UT (phased array)

  • Similar metal piping
  • Weld overlay piping
  • Dissimilar metal piping
  • Through-wall sizing inter-granular stress corrosion cracking (IGSCC)
  • Socket welds

Automated UT (conventional)

  • Reactor pressure vessel (RPV) assembly welds
  • RPV nozzles
  • RPV nozzle inner radius with NUREG-0619
  • Shroud attachment welds H8 and H9

Manual UT (conventional)

  • PDI-UT-1, -2, -3, -5, -8, and -10 (all currently supported Performance Demonstration Initiative [PDI] generic piping and bolting examinations)
  • Manual RPV assembly welds
  • Manual RPV nozzle inner radius
  • Flow accelerated corrosion (FAC)

Balance of plant (BOP) inspections

  • Direct visuals (VT-1, VT-2, VT-3)
  • Magnetic particle testing (MT)
  • Liquid penetrant testing (PT)

ASME B&PV Code Section IX, Subsection IWE and license renewal inspections

  • Regional inspections
  • Scoping/screening inspections
  • Aging management program (AMP) inspections
  • Site inspections
Contact us

Learn more about our NDE/ISI products and services