GDA Step 2 of the Holtec SMR-300: fundamental assessment
Fundamental assessment reports of the Generic Design Assessment (GDA) Step 2 for the Holtec SMR-300 reactor design.
Applies to England and Wales
Documents
Details
The Environment Agency, the Office for Nuclear Regulation (ONR) and Natural Resources Wales (the regulators) have an assessment process which enables them to scrutinise new nuclear power station designs before they are built in the UK. This process is called Generic Design Assessment (GDA).
Step 1 of the Holtec International GDA began on 18 October 2023. The Environment Agency and Natural Resources Wales completed Step 1 of the GDA on 1 August 2024 and issued a joint Step 1 statement, report of findings and a public summary on the Holtec SMR-300 design. A version of the report in Welsh is published on the Natural Resources Wales website. ONR’s reports are published on the joint GDA webpages.
Step 2 of the GDA began on 1 August 2024. The regulators completed Step 2 of the GDA and issued their Step 2 statements and assessment reports on the Holtec SMR-300 on 31 March 2026. The Environment Agency and Natural Resources Wales Step 2 statement is published here, along with the assessment report and a public summary of the report. A version of the report in Welsh is published on the Natural Resources Wales website. ONR’s reports are published on the joint GDA webpages.
Any nuclear power station design company going through GDA is required to set up a GDA website and public comments process. The comments process is now closed. You can read documents about this design on the company’s website Holtec Britain Generic Design Assessment.
The GDA process is described in the GDA guidance for Requesting Parties.
For any questions about these reports, email nuclear@environment-agency.gov.uk.