Rolls-Royce’s small modular reactor (SMR) design has advanced a significant step closer to becoming a reality. On Tuesday, the UK’s nuclear regulators announced that the 470 megawatts electric (MWe) SMR design had successfully passed the second stage of the generic design assessment (GDA). The milestone, achieved with oversight from the Environment Agency, Office for Nuclear Regulation (ONR), and Natural Resources Wales (NRW), marks substantial progress in the race to build Britain’s first mini-nuclear power plant amid increasing competition across Europe.
The generic design assessment (GDA) ensures that new nuclear power stations meet rigorous standards of safety, security, environmental protection, and waste management. Passing this stage allows Rolls-Royce SMR to mitigate project risks and gain regulatory confidence before presenting site-specific proposals.
The second stage of the GDA for Rolls-Royce’s SMR began in April 2023. It is notable as the first project design to clear this stage since the GDA process was initiated. According to the Environment Agency’s statement, Step 2 involved a comprehensive technical assessment, building upon preliminary work from Step 1.
Saffron Price-Finnerty, the Environment Agency’s New Reactors Program Manager, commended the achievement, stating, “We’re pleased to announce that following a great deal of hard work from all parties, we have successfully completed Step 2, the fundamental assessment of the Rolls-Royce SMR design while meeting the company’s program timescales.” Price-Finnerty emphasized that no significant issues were identified and that environmental protection and radioactive waste management remain key focuses for the developing design.
The project now moves to Step 3 of the GDA, which will involve a more detailed assessment and consultations with the public and other stakeholders regarding the design’s acceptability. This step is critical as the UK aims to reach its target of 24 gigawatts of nuclear power by 2050, representing a quarter of the nation’s electricity needs.
Rolls-Royce SMR presents a low-cost, clean energy solution using commercially available technology to deliver fully integrated, factory-built nuclear power plants. The company highlights the scalability of its SMR model, promising further investment in factories using the same design and management systems as demand increases.
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