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.
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
- Water washing
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.
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
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
Fact sheets
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IVVI Remote Inspection Tooling
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Overwatch remote In-Vessel Visual Inspections
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Ultrasonic testing
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IVVI Remote Inspection Tooling
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Overwatch remote In-Vessel Visual Inspections
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Ultrasonic testing
IVVI Remote Inspection Tooling
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.
Overwatch remote In-Vessel Visual Inspections
Plant services
Available nuclear power plant services and products
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