One of the plant’s reactors will start generating in the near future. Who will be exposed to the inherent risks? This was first observed at Hunterston in August 2014, when it was found in a small number of bricks in reactor four which were known to be more susceptible to cracking. Solarfam - компанія, орієнтована на розробку та інтеграцію сонячних продуктів. French multinational power generation firm EDF has received Scottish regulatory approval to temporarily start generating power at the Hunterston B nuclear station in Ayrshire. "ONR is satisfied that reactor four is safe to operate for the next period and can be safely shut down in all foreseeable circumstances, including that of a significant seismic event.". You can find out more about the role of graphite in our reactors, and the results of our inspections by following the link below. Britain’s nuclear watchdog has agreed to allow one of the country’s oldest nuclear reactors to restart, one year after it was shut down to investigate cracks in its graphite core. But EDF’s modelling in the past has a poor track record. Hundreds of computer programs and dozens of researchers are involved. But operator EDF has been cleared by the Office for Nuclear Regulation (ONR) to keep producing energy there for another six months despite the presence of cracks in its core. The power plant had four reactors, but reactors one and two are already being decommissioned. "Our assessment included extensive scrutiny of the underpinning evidence provided by the licensee and concluded that an adequate safety case has been provided to allow a further period of operation," it said. The reactor was shut down and an inspection was carried out on reactor four earlier than originally planned, in October last year. Reactor four was closed later in the year. Published. A nuclear reactor at a power station will temporarily return to service after being shut down last year when cracks were found in its core. In August 2019 the ONR granted permission for the reactor to be returned to service for a period of approximately 4 months. image copyright Getty Images. Another reactor was not granted permission by the regulator to restart. EDF Energy will be allowed to restart a reactor at its Hunterston plant in Scotland where cracks were found last year, for an initial four month period, Britain's nuclear regulator said on Tuesday. This letter was sent to the editors of the Scotsman and the Herald on September 25, 2020. EDF Energy said in a statement it is planning for a further, final, run of six months for each of the two reactors. The ONR claims that EDF have done computer modelling and made predictions that the reactors are likely to be safe for another six months. The BBC is not responsible for the content of external sites. They have been shut for 2 ½ years in one case and 1 ½ years in the other because they were unsafe due to large numbers of cracks and the loss of graphite in their cores. Reactor 4 at Hunterston B power station in North Ayrshire was one of two remaining reactors at the plant taken out of service last year. (Credit: EDF Energy) EDF Energy Nuclear Generation has secured approval from the UK’s Office for Nuclear Regulation (ONR) to restart operations of the Reactor 3 of the 1,220MW Hunterston B … “Remember that the majority of the Scottish population live in the central belt to the west of Hunterston and would be likely to be under the plume of radiation should there be a significant accident.” Hundreds of cracks were found in the graphite bricks within the reactor cores at the North Ayrshire plant. August 20, 2019. 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