Filtered Water Tank


The 40 ft dia. filtered water tank at a nuclear power plant was leaking. After assessing the steel tanks’s condition, the plant operator identified interior corrosion, small holes, and areas with steel section loss, and decided to undertake a project to repair the deterioration. SGH supported the design-build contractor for the remedial work by designing carbon fiber-reinforced polymer (CFRP) repairs.

SGH designed a watertight CFRP liner for the floor and bottom 2 ft of the tank, and a corrosion protection CFRP laminate for the tank wall. Highlights of our work include:

  • Performing finite element analyses to determine the stresses and strains in the steel tank considering:
    • Steel section loss due to corrosion
    • A loss of support if the 1 in. layer of sand between the tank floor and concrete foundation washes away
  • Developing CFRP repairs based on the AWWA Standard C305
  • Preparing design drawings and specifications for the CFRP repair work
  • Submitting calculations documenting our design and the associated assumptions

Project Summary



Completion Date
Repair & Rehabilitation
Advanced Analysis | Structures
Structural Technologies LLC
Specialized Capabilities
Repair & Strengthening | Nuclear | Computational Mechanics

Key team members

Rasko Ojdrovic
Rasko Ojdrovic
Senior Principal