The Environment Agency, Office for Nuclear Regulation (ONR) and Natural Resources Wales (NRW) are pleased to announce that the GE Vernova Hitachi BWRX-300 nuclear reactor design has successfully completed Step 2 of the Generic Design Assessment (GDA).

The two-step GDA began in January 2024 with a year-long initiation phase, during which regulators worked closely with GE Vernova Hitachi to establish a robust foundation for the assessment process.

Step 2, which began in December 2024, has seen regulators complete a comprehensive and rigorous assessment of the BWRX-300 reactor design. This phase has focused on evaluating the fundamental adequacy of the design and its safety, security, safeguards and environmental protection documentation.

The planned programme of assessment activities has

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