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Nova Products

18001 Sheldon Road
Middleburg Hts., OH 44130
Phone: +

Tensor Bolt Tensioning System

Built to support plants in all of their needs from installation to outage to maintenance, the Tensor Bolt Tensioning System is a proven design that is less complex, lightweight, fast to operate, and easy to maintain. Tensor AB’s systems have been installed in the United States since the 1990’s and worldwide for over 35 years, making them a perfect partner for Curtiss-Wright’s expertise. By partnering together, Curtiss-Wright and Tensor AB aim to better support plant health and maintenance in the North American nuclear market.

Key Features and Benefits

  • Compact design reduces tensioner weight
  • Easy handling method promotes worker safety
  • Reduced equipment set-up/removal time
  • Less weight added to the carousel/polar crane
  • Reliable, less-complex design is easy to maintain with minimal tooling
  • Fail-safe design with built-in redundancies/different operation modes
  • Flexible pump/console positioning in low dose area
  • Counterbalance device boosts safe and quick positioning
  • Flexible bolt tensioning system with 3 to 8 bolt tensioners
  • Designed to suit PWR, BWR, and CANDU plants
  • Floating piston

Principles of Operation

  • Lifting Beam
    • Designed to handle up to 8 studs
    • Balancing device for each stud minimizes handling damages
    • Easy access to parts for maintenance
  • Stud Rack
    • Holds up to 16 sets of studs and nuts
    • Designed to be easily handled with a forklift
    • Frame is made of stainless steel with plastic bolt holes for protection
  • Operation
    • The stud rack is placed on the refuel floor or in the cavity
    • The studs are lifted directly from the bolt cradle and placed in the stud rack
    • Each stud has a quick and easy connection/disconnection to the lifting beam
    • Movement from one stud to the next is achievable in 20 seconds or less

General Specifications

Weight: Approx. 1,600 lbs.
Height: Approx. 6’ with puller sleeves attached to the hoist
Pressurization Time: Less than 30 seconds adapted to customer requirements