Sizewell B, the UK's sole pressurised water reactor located near Leiston, Suffolk, is set to continue generating electricity for an additional two decades, following an agreement between its owner, EDF, and the government. The plant, which began operations in 1995 and was originally slated for decommissioning in 2035, will now remain operational until 2055. This significant extension is anticipated to enhance the UK's energy security and contribute to the nation's clean energy goals.
The deal involves a substantial investment of approximately £800 million by EDF for plant modifications and upgrades. This funding is crucial for ensuring the continued safe and efficient operation of Sizewell B, which currently supplies 3% of the UK's energy, sufficient to power more than two million homes. The agreement is expected to be finalised later this year, securing the futures of 620 staff and around 300 contractors employed at the facility.
Robert Gunn, station director of Sizewell B, highlighted the importance of the extension, stating that it would safeguard existing jobs and facilitate the recruitment of a new generation of young people in Suffolk for the nation's nuclear sector. Lord Patrick Vallance, Minister for Science, Innovation, Research and Nuclear, echoed this sentiment, describing the extension as "good news" that provides more clean electricity and secures jobs.
However, the decision has drawn criticism from environmental groups. Chris Wilson from Together Against Sizewell C (TASC) expressed concerns about the long-term financial and environmental impact, arguing that future generations would be left to manage the challenges of flood defence maintenance and the safe isolation of highly radioactive nuclear waste. TASC also raised fears about the concentration of significant power generation in East Suffolk, potentially making the area a vulnerable target and increasing the national grid's exposure to large-scale blackouts from a single incident.
The Office for Nuclear Regulation (ONR), the independent statutory regulator for nuclear safety, affirmed its constructive engagement with EDF on the extension plans. The ONR stated it is reviewing technical and safety case considerations to ensure the plant continues to meet the required standards of safety and security through its extensive inspection and assessment regime.