US SB3814

Establishes the Accelerating Reliable Capacity Program Account within DOE's Loan Programs Office with $3.6 billion in authorized appropriations to cover cost overruns on advanced nuclear energy projects receiving federal loan guarantees

Borrowers bear responsibility for cost overruns up to 120% of the Class 2 estimate; DOE covers 50% of additional overruns beyond that threshold, capped at the lesser of 30% of the base estimate or $1.2 billion per project

Requires qualifying projects to submit detailed project delivery plans, Class 2 cost estimates, resource-loaded schedules, labor analyses, and risk assessments approved by DOE before financial close

Allows loan guarantees up to 200% of the project's point base estimate and mandates quarterly progress meetings between DOE, the Loan Programs Office Director, and project stakeholders throughout construction

Expands eligibility for nuclear project tax benefits by exempting projects partnering with federal power marketing administrations, TVA, military installations, GSA, National Laboratories, or those using fuel procured under the Nuclear Fuel Security Act of 2023