BBC: New cracks found in the core of the Hunterston-B nuclear reactor could threaten operator EDF's plans to extend the Scottish power station's life.
Experts say fissures in two of the 3,000 graphite fuel bricks that make up its No 4 core are of a new type.
These "Keyway root cracks" are said to be more serious than previously identified fractures.
Safety rules stipulate that if the new problem gets above a certain threshold, the reactor would have to close.
Hunterston-B came online in 1976,...