Nuclear Tools

We have been providing high quality isolation and test tools supporting power generation for decades. Our short manufacturing lead times, experience, and reliability is what keeps our customers coming back.

General Nuclear Maintenance Plugs

Mechanical Research and Design, Inc. offers a full range of proven tool designs for general plant maintenance.

Many of our tools are utilized as primary isolation tools which have the added benefit in the “hot” zone.

Reactor Maintenance and Isolation Plugs

Mechanical Research and Design, Inc. plugs can be remotely installed underwater from the refueling platform. Underwater installation allows wet transfer of the steam dryer, reducing risk for airborne and personnel contamination. Streamline reactor nozzle plugs incorporate both passive and active seals. Reactor Nozzle Plugs (U.S. Patent 5402828)


Reduced radiation exposure risk


Remote installation


Installed with existing monorail hoists


While installed, the reactor nozzle plugs are fully testable to MSIV LLRT pressure requirements

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