What Structural Integrity Associates does

Structural Integrity Associates, Inc. (SI) is a privately held U.S. engineering services firm, operating as a subsidiary of SI Solutions, LLC, headquartered in Huntersville, North Carolina. The company provides specialized engineering consulting and analysis services to the nuclear power industry across the full nuclear fuel lifecycle, with a particular emphasis on fuel performance analysis, fuel reload licensing and license amendment management, thermal-hydraulic and transient safety analysis, and advanced reactor and fuel engineering for small modular reactors (SMRs) and micro reactor systems. Its principal customers are nuclear power utilities and operators, served via direct enterprise field-sales engagements on a per-engagement professional-services basis.

The company's technical centerpiece is PEGASUS™, a proprietary fuel performance code that combines nuclear fuel thermal-mechanics with full structural-mechanics large-deformation capabilities. PEGASUS supports multiple fuel designs and materials including UO2, SiC, metallic alloys, TRISO, and unique geometries, and provides predictive capabilities across the entire fuel cycle — operation, storage, and transport — with built-in 3D visualization and CAD-based interfaces. Beyond software, SI offers fuel behavior analysis, fuel reload and licensing management, advanced reactor engineering, nondestructive examination (NDE), metallurgical laboratory services, advanced engineering consulting, operational support services, and a newer digital solutions offering. The firm also serves pipeline integrity, civil infrastructure, and broader power-generation verticals beyond nuclear.

Revenue is generated primarily through professional services engagements, with no publicly disclosed pricing; the company markets through technical publications, webinars, and a LinkedIn/Facebook/YouTube presence, and distributes exclusively through direct enterprise sales. Ownership rests with parent SI Solutions, LLC, and the company operates a wholly owned subsidiary, SIA Engineering, P.C., Inc., for North Carolina operations, and retains Radiological Solutions, Inc. as an acquired brand within the SI Solutions family.

Name

Structural Integrity Associates

Legal name

Structural Integrity Associates, Inc.

Website

https://anatech.com

Company type

Private

Operating status

Operating

Short description

Structural Integrity Associates is a U.S.-based engineering services firm and subsidiary of SI Solutions, providing nuclear fuel performance analysis, reload licensing support, and advanced reactor engineering to nuclear utilities, anchored by its proprietary PEGASUS™ fuel performance simulation code.

Ownership category

akta.pro rank

Product category

Nuclear Engineering Services

NAICS

Engineering Services (54133), Testing Laboratories and Services (541380)

SIC

Services-Engineering Services (8711), Services-Testing Laboratories (8734)

akta.pro primary industry

Spent Fuel Management Engineering, Consulting & Digital Tools (Thermal/Shielding/Criticality, QA) (EUAKAHAL)

akta.pro secondary industries

Component Qualification, Testing & Certification (Seismic, Environmental, EMI/EMC) (EUAKADAO), Nuclear Materials Testing, Assay & Characterization Services (NDA/NDE, radiochemistry, materials analysis) (EUAKAIAL)

Keywords

• Nuclear engineering services
• Fuel performance analysis
• Structural integrity consulting
• Non-destructive examination
• Metallurgical laboratory services

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations

Revenue model

1. Engineering Consulting Services: Technical engineering consulting services for nuclear fuel design, licensing, and performance analysis delivered to nuclear utilities and operators through professional services engagements.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Structural Integrity Associates provides engineering consulting services specializing in nuclear fuel technology and analysis. The firm offers fuel behavior analysis, fuel reload process and licensing support, advanced reactor and fuel engineering, non-destructive examination (NDE), metallurgical laboratory testing, advanced engineering, operational support services, and digital solutions to nuclear utilities and power operators. Markets served include nuclear power, power generation, pipeline, and civil infrastructure.

Product overview

Structural Integrity Associates offers a portfolio of nuclear fuel engineering and analysis services centered around its flagship product PEGASUS, an advanced fuel performance code. The company provides specialized services across the nuclear fuel lifecycle including fuel behavior analysis, reload licensing management, and advanced reactor engineering. Supporting services include nondestructive examination, metallurgical laboratory analysis, and digital solutions. The offering is organized as a services-led portfolio with PEGASUS serving as the primary software product, supplemented by consulting and engineering services for power generation, nuclear power, pipeline, and civil infrastructure industries.

Differentiator

Problem solved

Functional benefit

Brands

• Pegasus™: Advanced fuel performance code developed by SI for nuclear fuel modeling and simulation, combining nuclear fuel thermal-mechanics with full structural mechanics large deformation capabilities.

Products and services

• Fuel Behavior Analysis
• Fuel Reload Process/Licensing
• Advanced Reactor & Fuel Engineering
• Non-Destructive Examination (NDE)
• Metallurgical Laboratory
• Advanced Engineering
• Operational Support Services
• Digital Solutions
• PEGASUS™ Fuel Performance Code

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Recent moves5 records

Expansion highlights4 records

Direct peers

• Studsvik: Swedish nuclear engineering and fuel performance software firm whose CASMO/SIMULATE codes are the dominant industry-standard reactor physics/fuel management suite. Directly comparable to SI's PEGASUS in serving nuclear utilities with fuel performance analytics and licensing support, and the most obvious head-to-head competitor in independent fuel modeling.
• NAC International: Nuclear fuel consulting and engineering firm specializing in spent fuel management, transport cask licensing, and fuel cycle services. Closely comparable niche peer with similar independent-consulting positioning and overlapping customer base among U.S. nuclear utilities.
• Holtec International: Nuclear industry engineering and equipment company providing spent fuel storage systems, decommissioning services, and reactor ancillary equipment. Overlaps with SI in serving nuclear utilities with specialized engineering and licensing services, particularly adjacent to SI's Radiological Solutions subsidiary.

Broad incumbents

• Framatome: Global nuclear OEM (fuel fabrication, reactor design, services) with an extensive fuel engineering and fuel code portfolio (e.g., COPERNIC). Competes with SI on fuel reload licensing, transient and thermal-hydraulic analysis, and advanced fuel modeling, but as part of a vertically integrated offering rather than an independent specialist.
• Westinghouse Electric Company: Nuclear OEM and fuel fabricator with broad fuel engineering and reload licensing services. Competes head-to-head with SI for fuel reload engineering and advanced reactor fuel qualification, but with embedded fuel supply contracts that change the competitive dynamic.
• GE Hitachi Nuclear Energy: Nuclear OEM offering BWR fuel design, reload engineering, and services to the U.S. BWR fleet. Competes with SI for BWR-side fuel reload licensing and transient safety work, and is a major counterparty in any advanced reactor (BWRX-300) fuel qualification effort.
• Curtiss-Wright Corporation: Diversified industrial and nuclear engineering firm (including legacy Scientech, Corlytics, and other nuclear-services brands) serving U.S. and allied nuclear utilities with safety analysis, I&C, and engineering services. Competes with SI on the broader nuclear engineering services menu, though less focused on fuel performance codes specifically.
• BWX Technologies (BWXT): Nuclear components and fuel manufacturer with growing nuclear engineering services and advanced reactor (e.g., microreactor) programs. Comparable as both a potential SI customer (fuel qualification support) and competitor (microreactor fuel engineering), operating at much larger scale.

Emerging players

• Lightbridge Corporation: Advanced nuclear fuel developer focused on metallic alloy fuel designs for both existing LWRs and future reactors. Comparable to SI's advanced reactor and metal-alloy fuel modeling capabilities, but Lightbridge is fuel-design-led rather than an independent engineering services firm.
• X-energy: SMR developer using TRISO pebble fuel for the Xe-100 high-temperature gas reactor. PEGASUS's TRISO modeling capability and SI's Advanced Reactor & Fuel Engineering service overlap directly with X-energy's fuel qualification and licensing needs, making X-energy a customer-as-peer as much as a competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UChu8bpmXOmNZD2xqg609kvA
• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/structural-integrity-associates

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Structural Integrity Associates