Nuclear Plant Services

Operating and maintaining a nuclear power plant, renewing the license of an older nuclear plant, or licensing, designing, and constructing a new nuclear plant — all are monumental efforts that few utilities care to tackle entirely on their own. Most utilities need the support and engineering services, monitoring systems and analytical software, and industry-specific training that can come only from an engineering consulting firm that has grown with the nuclear industry.

Structural Integrity Associates, Inc. (SI) has provided support and engineering services to both domestic and international nuclear utilities for more than 25 years. In fact, engineering assessments, repairs, and consulting services for nuclear plants were SI's first business offering in 1983. Since then, nearly every nuclear utility in the United States — and many internationally — has relied on SI's support. In addition to resolving plant issues, SI's professional staff are active in ASME Code committees, and they develop technology and software that have become nuclear industry mainstays.

Innovative Products and Services from Structural Integrity:

Customized Solutions

• Aging management of PWR vessel internals under the EPRI® Materials Research Program
• BIoGEORGE^© for Microbiologically Influenced Corrosion
• Underground Pipe and Tank Initiative (UPTI)
• Flaw evaluation procedures & acceptance standards for ASME Nuclear Inservice Inspection Code
• Hydrogen water chemistry (HWC) and co-patented zinc injection for stress corrosion cracking mitigation in BWRs
• IGSCC test program for the BWR industry
• Leader in HDPE for NDE Services

Software Development

• Life prediction software, including NRC’s PRAISE probabilistic fracture mechanics-based software for nuclear reactor piping
• MAPPro^® software for expediting data management, risk modeling, decision-making, and process documentation
• pc-CRACK 4.0 for analyzing and predicting flaw behavior, including calculation of crack growth rates and critical crack sizes for pressure vessels, piping, steam turbines, and structures
• Pioneered the implementation of Integrity Management written procedures, data integration, HCA identification, code interpretation, and risk minimization practices and algorithms – including participation in the development of API 1160 and several NACE Direct Assessment standards
• Viper/Viper-Noz/Viper-WR to determine probability of failure for reactor pressure vessel welds and nozzles
• Developed for the U.S. NRC, WinPraise can analyze crack initiation and growth caused by fatigue, primary water stress corrosion, intergranular stress corrosion, & flow-accelerated corrosion
• SI-MiniDAS©; high-speed, automated SI-VersaDAS©; and real-time TTVMS© (Transient Torsional Vibration Monitoring System) are proprietary customizable data acquisition systems that collect and analyze vibration data