Britain’s nuclear regulator said it has approved a request from EDF Energy to increase the maximum operating temperature in the reactors at its Hartlepool and Heysham 1 nuclear plants to avoid reducing reactor power. In 2014, the two plants were shut down for several months after cracks were found in the reactor boilers. When they restarted, they did so at reduced output to stop high temperatures causing more cracks. EDF Energy has asked the Office for Nuclear Regulation for permission to raise the operating limit for the upper surface of hot box domes inside the reactors to 390 degrees Celsius from 380 degrees.
Reuters 6th July 2018 read more »