Most Expensive Building in U.S. History is Key to New Nuclear Arms Race

FOR IMMEDIATE RELEASE, April 22, 2026

Contact: Tom Clements, Director, SRS Watch, 803-240-7268 | Email
Jay Coghlan, 505.989.7342, c. 505.470.3154 | Email
Shelby Cohen, Comms Manager, SC Env. Law Project, 864.414.7726 | Email

Columbia, SC – On April 21, plaintiffs Savannah River Site Watch, Nuclear Watch New Mexico and Tri-Valley CAREs toured the plutonium “pit” bomb core production plant at the National Nuclear Security Administration’s (NNSA’s) Savannah River Site (SRS) near Aiken, South Carolina. They were accompanied by their attorney from the South Carolina Environmental Law Project and a science consultant from the Union of Concerned Scientists.

Plutonium pits are the core components of all U.S. nuclear weapons. The NNSA is seeking to expand production to at least 30 plutonium pits per year at the Los Alamos National Laboratory (LANL) in New Mexico and at least 50 pits per year at SRS, which has never previously produced pits. NNSA pushed forward with the project without required public review, in violation of the National Environmental Policy Act (NEPA).

Plaintiffs sued in federal court in Columbia, SC and won, requiring the NNSA to complete a nationwide programmatic environmental impact statement (PEIS), with public hearings to be held this May (listed below). The court-approved settlement agreement also required an inspection of the Savannah River Plutonium Processing Facility by plaintiffs to ensure that no production begins before the completion of the final PEIS and simultaneous Record of Decision, which NNSA now says is expected in early 2027. NNSA officials also informed plaintiffs that 90% design and “rebaselined” costs will not be completed until September 2026, which means that once again Congress will be appropriating taxpayers’ money without knowing full costs.

The SRS pit plant will be the most expensive buildings ever built in the USA, with a current NNSA estimate of up to $30 billion even before all total costs are known (includes at least $5 billion in sunk costs for SRS’ failed MOX Fuel Fabrication Facility being “repurposed” to pit production). The agency’s recent budget request for FY 2027 (pp 17-19) reveals an 87% jump in combined pit production funding for LANL and SRS, averaging $5 billion for each of the next six years.

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