Spreading cracks at the Torness nuclear power station in East Lothian mean that it will have to close two years earlier than planned.
Running an ageing nuclear reactor at Hunterston in North Ayrshire for another year could cause cracks in its core to rise 65 per cent to nearly a thousand.
The energy company EDF is planning to operate a cracked nuclear power station at Hunterston in North Ayrshire for another year before closing it down for good.
One of the nuclear power reactors at Torness in East Lothian has been shut down following a problem with a valve, prompting increased concerns about its future.
Cracks that could increase the risk of a radioactive accident at Torness nuclear station in East Lothian will start appearing six years sooner than previously thought, says UK safety watchdog.
The nuclear power station at Hunterston in North Ayrshire has breached radiation safety rules and suffered five other problems with its safety systems.
The graphite cores of two ageing nuclear reactors at Hunterston in North Ayrshire have begun to crumble as cracks spread.
One of the two cracked reactors at Hunterston B nuclear power station in North Ayrshire has been given permission to reopen - but only for four months.
The UK nuclear safety watchdog has boosted checks on two reactors in Scotland because of proliferating cracks in their graphite cores.