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Featured products

Mantis tool

A pole- or rope-deployed stable platform for BWR in-vessel visual inspection (IVVI). It clamps to the plant’s existing reactor vessel steam dam structure to increase IVVI exam efficiency and quality. It can be operated manually or remotely.

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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 GVH’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.

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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 GVH’s available NDE/ISI services

  • Similar metal piping
  • Weld overlay piping
  • Dissimilar metal piping
  • Through-wall sizing inter-granular stress corrosion cracking (IGSCC)
  • Socket welds
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  • Reactor pressure vessel (RPV) assembly welds
  • RPV nozzles
  • RPV nozzle inner radius with NUREG-0619
  • Shroud attachment welds H8 and H9
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  • 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)
  • Direct visuals (VT-1, VT-2, VT-3)
  • Magnetic particle testing (MT)
  • Liquid penetrant testing (PT)
  • Regional inspections
  • Scoping/screening inspections
  • Aging management program (AMP) inspections
  • Site inspections

Fact sheets

IVVI Remote Inspection Tooling

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Fact sheet
In nuclear power, safety and precision are non-negotiable. Our Mantis tool revolutionizes weld inspections by eliminating the need for cranes or heavy rigging. Lightweight, remotely operated, and designed for hard-to-reach areas it delivers high quality stable exams without disrupting refueling operations.
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Overwatch remote In-Vessel Visual Inspections

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Fact sheet
Overwatch is a multi-purpose tooling solution that utilizes two multi axis robotic arms mounted on the reactor pressure vessel guide rods that performs core verification, visual inspections, and water washing cleaning capabilities.
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Ultrasonic testing

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Fact sheet
UT ILO RT is a newer offering from GE Vernova Hitachi Nuclear Energy (GVH) Inspection Services business. GVH is constantly improving and adapting our techniques, tooling, and procedures to satisfy a multitude of customer inspection needs.
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Plant services

Available nuclear power plant services and products

Outage Services

Use GVH’s technology, innovation, and experience for easier and less costly outages.

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Power performance improvements

GVH Nuclear Energy Performance Services offers a unique combination of experience, knowledge, and capabilities.

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Replacements and refurbishments

Identify the solutions required to support your plant systems through end of life.

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Power uprates

GVH’s rigorous, NRC-approved procedure provides confidence that your uprate follows a tested and approved approach.

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Need technical expertise?

With expertise data from the dawn of the nuclear power era, GVH offers services ranging from engineering consultation to on-site assitance.

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Contact us

Learn more about our NDE/ISI products and services

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GE Vernova Hitachi Nuclear Energy is a world-leading provider of advanced reactor technology, fuel and nuclear services.

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