MARINE PROFESSIONALS SINCE 1919
Brennan’s certified commercial divers support nuclear facilities with underwater inspections, construction, and specialized services—backed by an NQA program approved to perform safety‑related work in accordance with ASME NQA‑1 (2022), 10 CFR 50 Appendix B, and 10 CFR Part 21.
ASME NQA‑1 (2022), 10 CFR 50 App B, 10 CFR Part 21
9001 / 14001 / 45001
In the complex world of nuclear power, safety and efficiency demand a specialized skill set. Brennan supports nuclear facilities with disciplined planning, experienced dive teams, and clear documentation designed to meet project-specific quality assurance requirements and strict safety expectations.
Brennan provides underwater services that support reliability, performance, and long-term asset integrity, including:
Safety is at the forefront of every task we perform and every decision we make. Brennan crews receive extensive training, the right equipment, and the support required to execute work in safety‑critical environments. Our approach is reinforced by quality programs and certifications designed to consistently meet expectations.
Brennan is committed to upholding the quality assurance, safety, and regulatory standards mandated for nuclear industry activities, including:
Brennan is committed to upholding the quality assurance, safety, and regulatory standards mandated for nuclear industry activities, including:
We leverage technology to enhance safety, efficiency, and insight—above and below the waterline. Our investment in ROVs, acoustic imaging, and stereo camera systems supports detailed inspections and clearer decision-making in challenging environments.
Outfitted with high‑definition cameras and sonar imaging, ROVs support pre‑dive planning, confined space inspections, and asset condition monitoring. Systems can be equipped with specialized tools like pressure washers, manipulator arms, dredging gear, and thickness gauges.
Advanced 360‑degree sector scans and side‑scan sonar provide high‑resolution visuals in low‑ or zero‑visibility environments—supporting precise identification, mapping, and evaluation of underwater assets.
Ultra high‑resolution video and crisp still images to support measurable visuals, 3D modeling, and point cloud generation for submerged assets in near‑zero visibility conditions.
An inspection is only as valuable as the information it provides. That's why our deliverables are built with care—designed to clearly communicate findings, highlight risks, and support long‑term planning.
%20Panning%20%26%20Dive%20Team-124_webview.jpg "JF Brennan team member assists a diver at Chicago Harbor Lock.")
Brennan is a family‑owned marine construction, environmental remediation, and barge transportation firm operating throughout the United States. For over 100 years, our high‑quality work and transparent communication have made us a preferred contractor for public and private owners of water‑based infrastructure.
We support a range of nuclear-sector underwater needs, including intake / outfall systems, traveling water screens, valves and seals, dredging support, coating applications, welding, and other specialized services.
Brennan is approved to perform safety‑related work in accordance with 10 CFR 50 Appendix B, ASME NQA‑1 (2022), and 10 CFR Part 21, and is certified to ISO 9001, ISO 14001, and ISO 45001.
Yes. We use tools such as ROVs, acoustic imaging, and stereo camera systems to improve visibility and insight in difficult environments.
Deliverables may include written results, photo / video documentation, CAD drawings (as applicable), optional acoustic images, and straightforward recommendations.
Brennan operates throughout the United States.
Share your goals and constraints. We’ll follow up to align on requirements, safety expectations, and deliverables.