Nimitz Class Aircraft Carrier (CVN-68) — Asbestos in the Nuclear Supercarrier Class

The Nimitz class nuclear-powered aircraft carriers — ten ships commissioned between 1975 and 2009, hull numbers CVN-68 through CVN-77 — constitute the most powerful class of warships ever built, each displacing approximately 100,000 tons and carrying a crew of approximately 5,000 sailors and air wing personnel. The class uses two Westinghouse A4W pressurized water reactors driving four sets of steam turbines producing 260,000 shaft horsepower on four shafts, providing the power for speeds exceeding 30 knots. All Nimitz class ships were built at Newport News Shipbuilding in Newport News, Virginia. Nimitz class carriers commissioned in the 1975–1985 period — USS Nimitz (CVN-68), USS Dwight D. Eisenhower (CVN-69), USS Carl Vinson (CVN-70), USS Theodore Roosevelt (CVN-71), and USS Abraham Lincoln (CVN-72) — were built during the transitional era when the Navy’s asbestos phase-out was underway but not yet complete, with the earliest-commissioned boats incorporating asbestos-containing materials in secondary steam system insulation, crew habitability spaces, and interior construction materials installed during the ships’ Newport News construction periods.

Nuclear Plant Secondary Steam Systems and Transitional Asbestos

Early Nimitz class carriers incorporated asbestos in secondary steam systems:

• A4W reactor secondary steam system insulation — the secondary side steam systems of the A4W reactor plants in early Nimitz class carriers — steam generators, secondary steam distribution systems, ship’s service turbine generators, and steam-driven hotel service systems — incorporated thermal insulation on secondary steam piping and components. The earliest-commissioned Nimitz class carriers (CVN-68 through CVN-70) built in the 1968–1982 construction period used insulation materials that in some secondary steam system applications incorporated asbestos-containing thermal insulation consistent with the Navy’s transitional construction specifications being updated during the class’s initial construction period. Machinist’s Mates and nuclear-trained engineering personnel working in Nimitz class nuclear propulsion spaces worked in proximity to the secondary steam system insulation throughout engineering watch standing
• Ship’s Service Turbine Generator (SSTG) steam systems — the SSTG installations providing massive electrical power for Nimitz class carrier hotel loads incorporated steam admission systems with asbestos-containing insulation in the SSTG steam piping of the earliest-commissioned carriers. Engineering personnel maintaining SSTG steam systems in Nimitz class machinery spaces worked in proximity to SSTG steam piping insulation during SSTG maintenance duties

Crew Space and Interior Construction Asbestos

Early Nimitz class carriers incorporated transitional construction materials in crew spaces:

• Crew berthing and living space construction — the earliest-commissioned Nimitz class carriers (CVN-68 through CVN-70) were built during the transitional period when some asbestos-containing interior construction materials remained in Navy carrier construction specifications. Crew members serving aboard the earliest-commission Nimitz class carriers accumulated background asbestos exposure from the transitional-era interior construction materials in the crew berthing, mess, and living spaces installed during the ships’ construction periods
• Hangar bay construction — the massive hangar bays of the earliest Nimitz class carriers built in the 1975–1982 period incorporated some asbestos-containing fire-resistant construction materials in the hangar bay structural elements and boundary construction consistent with the transitional construction specifications of the period

VA Claims for Nimitz Class Veterans

VA presumptive service connection under 38 CFR § 3.309(d) covers asbestos exposure aboard Navy aircraft carriers. Machinist’s Mates, nuclear-trained engineering personnel, and crew members who served aboard early-commission Nimitz class carriers and have since been diagnosed with mesothelioma, asbestosis, or asbestos-related lung cancer may qualify for VA disability benefits.

Source notes: equipment-manifest entries (where shown) are sourced from public-record BUSHIPS (Bureau of Ships) documentation, NARA archives, and the public asbestos litigation record. Manufacturer attributions link to documented asbestos-product histories on AsbestosIndex.com where available. Nothing on this page constitutes medical or legal advice.