West
Diablo Canyon Power Plant
PG&E retained SGH to support the re-evaluation of their Long Term Seismic Program (LTSP) for Diablo Canyon, which is situated in a high-seismic hazard zone on the central coast of California.
Idaho Falls, ID
Idaho National Laboratory, Advanced Test Reactor Control Room Wall
Scope/Solutions
The Advanced Test Reactor (ATR) at the Idaho National Laboratory (INL) supports research and testing of materials for use in large-scale and prototype reactors. Previous analyses indicated that the eastern partition walls of the control room inside the reactor building have insufficient out-of-plane capacity to resist a design earthquake. SGH evaluated and designed upgrades for the unreinforced concrete masonry partition walls that support numerous equipment and utility lines.
For this project, SGH performed a structural evaluation and designed the upgrades for the masonry partition walls at the east side of the control room for Performance Category 4 (PC-4) compliance. Upgrades include:
- New vertical and horizontal steel strong backs strategically located to minimize interference with existing equipment and utilities
- One-sided and through-bolted connections to ungrouted concrete masonry walls
- Various top and base anchorage details
- Options for bolted and welded connections to existing structural steel that do not require reinforcement of existing components
We prepared calculations, design drawings, and specifications; and delivered a formal presentation to our client. Our work was independently reviewed and accepted.
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Project Summary
Solutions
Repair & Rehabilitation
Services
Structures | Advanced Analysis
Markets
Energy
Client(s)
Battelle Energy Alliance, LLC (BEA)
Specialized Capabilities
Seismic Engineering | Repair & Strengthening | Nuclear
Key team members
Additional Projects
West
Columbia Generating Station, Spent Fuel Pool
After the Fukushima Daiichi accident, the U.S. Nuclear Regulatory Commission (NRC) issued 10 CFR 50.54(f), a letter requiring licensees to perform a reevaluation of seismic hazard and take further actions if it exceeds their design basis.