Nuclear Services

Specialized nuclear welding and repair solutions ensuring safe, reliable and on-schedule plant operations

Engineered Nuclear Welding Solutions You Can Trust

WSI delivers industry-leading nuclear welding maintenance, repair, and overlay solutions whether planned or emergent that protect critical assets and extend the life of your plant. With nearly 50 years of nuclear expertise, WSI’s Nuclear QA Program meets the requirements of 10 CFR 50 Appendix B and NQA-1. Our teams bring the specialized skills, tooling, and engineering rigor required for projects that are critical to safety, critical to schedule, and critical to quality.

Comprehensive Nuclear Service Capabilities

Dry Fuel Storage Closure Services

WSI is a leader in remote GTAW canister sealing for dry fuel storage. Our proven system improves ALARA performance, reduces schedule risk, and delivers repeatable weld quality across more than 250 completed canisters with zero defects.

Flow Accelerated Corrosion (FAC) Repair

Using our proprietary Cross Under Piping Unifuse System CUPUS^®, WSI applies a remote pulsed spray GMAW overlay to mitigate FAC without costly pipe replacement. CUPUS provides 360-degree coverage inside piping 21 to 60 inches in diameter with minimal heat input and full fusion bonding.

Gate Valve Repair Services

WSI performs remote and automated gate valve repairs using proprietary Seat Repair and Guide Rib Milling tools. Precision machining and hard-facing restore functionality, reduce dose, and improve ALARA results for critical valve systems.

Large and Small Bore Nozzle Weld Overlays

WSI has set industry benchmarks for full structural weld overlays on component and reactor vessel nozzles of varying sizes with complex geometries and tight outage schedule windows. Advanced dual head machine GTAW processes enable high deposition rates while meeting ASME Code requirements.

Large Component Segmentation Services

From steam generator dome separation to heavy wall steel welding, WSI executes complex segmentation projects safely and on schedule. Our field proven processes minimize dose and maintain first time quality supported by some of the largest machining clamshells in the United States.

MSIV Services

WSI’s single setup MSIV Diagnostics and Repair System integrates electronic mapping, machining, and welding to streamline valve repairs and reduce dose. The automated GTAW process delivers consistent weld quality, shorter schedules, and proven results across more than 130 nuclear power plants worldwide.

Outage Support

Augment your outage team with WSI’s nuclear qualified craft professionals and extensive automatic welding tooling. We provide specialty welding maintenance and repair services to keep outages on track and within budget.

Pressurizer Nozzle Weld Overlay (WOL)

To combat primary water stress corrosion cracking PWSCC in Alloy 600 components, WSI applies an engineered structural overlay. Our global track record includes multi location pressurizer nozzle repairs completed safely and efficiently.

Reactor Coolant Pump Nozzle WOL

WSI pioneered First of a Kind weld overlays on reactor coolant pump nozzles delivering optimized WOL (OWOL) solutions and earning NRC approval for breakthrough Alloy 600 mitigation methods.

Structural Weld Overlays

Our code approved structural weld overlays reposition the pressure boundary and place dissimilar metal welds in compression which creates an engineered permanent repair for high energy components in aging power stations.

Engineered and Repair Solutions

Whether it is turnkey weld overlays, pressure vessel nozzle repairs, or unique first of a kind repairs, WSI brings deep expertise in metallurgy custom tooling and ASME Code engineering to every nuclear project. These capabilities demonstrate our leadership in advanced nuclear repair welding for even the most demanding configurations.

Why WSI

WSI provides the expertise and resources to ensure nuclear outage, mitigation, and repair projects are completed safely, efficiently and to the highest quality standards. Our long record of success in nuclear welding gives plant operators confidence that critical systems will remain reliable for years to come and support your plant life extension/uprate plans.

Proven nuclear expertise with nearly 50 years of nuclear industry experience

Extensive resources including more than 700 nuclear qualified craft personnel and more than 250 specialized automatic welding and mechanical systems
The Nuclear QA Program meets the requirements of 10 CFR 50 Appendix B and NQA-1
Innovation and responsiveness from proprietary overlay technologies to custom tooling, WSI responds quickly to planned and emergent needs

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Why WSI

Proven nuclear expertise with nearly 50 years of nuclear industry experience

Extensive resources including more than 700 nuclear qualified craft personnel and more than 250 specialized automatic welding and mechanical systems
The Nuclear QA Program meets the requirements of 10 CFR 50 Appendix B and NQA-1
Innovation and responsiveness from proprietary overlay technologies to custom tooling, WSI responds quickly to planned and emergent needs