This bill establishes the Accelerating Reliable Capacity Program to provide up to \$3.6 billion in cost-overrun protection for large, advanced nuclear energy projects that secure a federal loan guarantee.
James Risch
Senator
ID
The Accelerating Reliable Capacity Act of 2026 establishes a program to provide cost certainty for large, advanced nuclear energy projects that secure federal loan guarantees. This program creates a dedicated account to cover eligible project cost overruns above 120% of the base estimate, up to a specified maximum payment per project. Additionally, the bill enhances financing terms for these qualifying projects and amends existing law to exempt certain utility and military-affiliated nuclear projects from "double benefit" restrictions.
ARC Act of 2026 Pledges $3.6 Billion to Shield Advanced Nuclear Projects from Massive Cost Overruns
Building a nuclear power plant is notoriously expensive and prone to delays that can bankrupt even the biggest companies. The Accelerating Reliable Capacity (ARC) Act of 2026 aims to fix this by having the federal government act as a financial safety net for 'advanced' nuclear projects. Under this bill, the Department of Energy (DOE) would set up a $3.6 billion account specifically to cover cost overruns. If you’re a utility worker or an engineer, this is a massive signal that the government is doubling down on nuclear; if you’re a taxpayer, it means you’re now partially on the hook if these complex projects blow their budgets.
The 120% Rule and the Safety Net
Here is how the math works: if a company wants to build a new reactor, they first have to submit a hyper-detailed 'Class 2' cost estimate and a project plan (Section 2). The company is responsible for every penny of cost overruns until they hit 120% of that original estimate. Once they cross that threshold—meaning the project is 20% over budget—the government steps in. The DOE Director can then use the program’s billions to pay down the principal of the project’s federal loans. However, there is a ceiling: the government won’t pay more than 30% of the original cost estimate or $1.2 billion per project, whichever is smaller. It’s essentially a high-deductible insurance policy for power plants.
Breaking the 'Double Dipping' Ban
One of the more technical but impactful parts of this bill involves 'double benefits' (Section 3). Normally, the government tries to prevent companies from getting two different types of federal tax breaks or subsidies for the same project. This bill carves out a major exception for projects that partner with the military, the Tennessee Valley Authority, or national labs. For a tech worker at a national lab or a contractor on a military base, this could mean more local energy projects getting the green light because they can now stack federal incentives that were previously off-limits. It makes these partnerships much more attractive to private investors who were scared off by the old 'no double-dipping' rules.
High Stakes for the Public Purse
While the bill includes oversight—like requiring the Secretary of Energy to brief Congress every quarter—the real-world risk lies in the complexity of 'advanced' nuclear technology. Because these are often first-of-their-kind designs, predicting costs is notoriously difficult. If multiple projects hit that 120% overrun mark simultaneously, the $3.6 billion fund could be drained quickly. For the average person, the trade-off is clear: the bill aims to ensure a more reliable power grid and stable energy prices in the long run, but it does so by shifting the financial risk of construction blunders from private utility shareholders to the public treasury.