South
Filtered Water Tank
The 40 ft dia. filtered water tank at a nuclear power plant was leaking. SGH supported the design-build contractor for the remedial work by designing carbon fiber-reinforced polymer (CFRP) repairs.
Glen Rose, TX
Comanche Peak Nuclear Power Plant, Units 3 & 4
Scope/Solutions
SGH designed several Seismic Category I structures at the Comanche Peak nuclear facility for preparation of Combined Operating License Application (COLA). These reinforced concrete structures include the ultimate heat sinks (UHS), power source fuel storage vaults (PSFSV), and essential services water pipe tunnels (ESWPT). SGH analyzed the original structural configuration and seismic input, and reanalyzed and designed them four years later with revised geometry and loading.
To ensure adequate strength and stability during applied loads in accordance with the applicable codes and standards, SGH modeled and analyzed for:
- Seismic soil-structure interaction effects (using SASSI) considering:
- Seismic structure-soil-structure interaction effects
- Groundwater elevation differences
- Soil separation
- Various UHS basin water levels
- Fluid-structure interaction effects
- Static loadings and load combinations
- Tornado effects, including wind pressure, atmospheric pressure drop, and missiles
- Construction loading such as vehicle surcharge and wall backfill scenarios
- Sliding and overturning
In addition, SGH:
- Performed a structural design evaluation to determine required reinforcement
- Generated in-structure response spectra (ISRS) for use in equipment and utility design
- Collaborated with URS to prepare the COLA
- Supported development of responses to NRC requests for additional information (RAIs)
Photo courtesy of Luminant, Dallas, TX
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Project Summary
2013
Completion Date
Solutions
New Construction
Services
Structures | Advanced Analysis
Markets
Energy
Client(s)
URS Corporation
Specialized Capabilities
Seismic Engineering | Nuclear | Computational Mechanics
Key team members
Additional Projects
South
Lake Livingston Hydroelectric Plant
East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream side of the existing spillway and along the Trinity River. SGH provided engineering services during construction of the hydroelectric plant and continues to serve as the chief dam safety engineer, as required by the Federal Energy Regulatory Commission (FERC).