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Raises the size limits and clarifies definitions for small modular reactors (SMRs) and microreactors, directs the Nuclear Regulatory Commission (NRC) and Department of Energy (DOE) to update guidance to match those definitions, and allows DOE to fund SMR projects even if a single unit’s output exceeds prior megawatt thresholds. It also creates a DOE working group to promote SMR commercialization and manufacturing in the United States and requires annual reports through 2030. The bill mainly changes how SMRs and microreactors are defined and treated for regulation and DOE funding. It increases per-module and fleet electrical output caps, aligns federal guidance with the new definitions, broadens DOE grant/award eligibility for larger units, and establishes an interagency working group to support industrialization, workforce readiness, and cost reduction for SMRs.
The bill broadens definitions and support for larger SMR/microreactor designs to speed deployment, create jobs, and boost low‑carbon baseload capacity—but does so at the cost of higher fiscal and ratepayer exposure, increased local safety and regulatory pressures, and the potential crowding out of smaller clean‑energy projects.
Utilities and energy companies can build and seek support for larger small modular reactor (SMR) modules and slightly larger fleets (e.g., up to ~500 MW modules and larger site totals), enabling higher per-unit output and scale.
Consumers, taxpayers, and local governments may eventually see lower electricity prices and reduced carbon emissions as larger, higher‑output SMRs provide more reliable low‑carbon baseload power.
Utilities, developers, manufacturers, and researchers gain clearer, standardized definitions across agencies that reduce regulatory uncertainty, speed reviews, and support R&D and commercialization pathways for SMRs and microreactors.
Taxpayers and electricity ratepayers could face higher costs from larger construction, decommissioning, and subsidy obligations if projects run over budget or federal support scales up for costlier deployments.
Communities near sites (local and rural governments) face higher local safety and emergency‑planning stakes because higher‑capacity modules concentrate more radioactive material and federal definitions do not resolve waste/decommissioning risks.
Expanding eligible sizes and altering definitions without parallel siting or regulatory changes could strain NRC licensing, permitting, and oversight resources and create interim regulatory uncertainty that slows approvals.
Introduced April 10, 2025 by James Baird · Last progress April 10, 2025