SMR-300

In Development

Overview

Holtec's Gen III+ pressurized water small modular reactor platform, intended for first deployment as the dual-unit Pioneer 1 & 2 project at Palisades and for follow-on projects such as Cottam in the UK.

Design is now centered on the SMR-300 architecture; Pioneer 1 & 2 at Palisades has DOE support, the NRC has accepted the first part of the construction permit application for review, and the design completed UK GDA Step 2 in March 2026.

Key Specs

Electrical Output

>320 MWe per unit

Reactor Type

Pressurized light-water reactor (PWR)

Pioneer Configuration

2 units / 680 MWe total

Site Footprint

~15 acres per unit deployment

International Pipeline

Palisades (U.S.) and Cottam (UK/EDF)

Licensing Status

U.S. CPA accepted; UK GDA Step 2 complete

Target Deployment

Early 2030s