Magnox stated that workers had been carrying out routine maintenance when a small relay overheated (this failure caused the turbine to shut down). Their spokesman went on to say, "Because the turbine tripped the steam produced in the boilers couldn't be sent to the turbine as it would normally and so was released through relief valves on top of the building." and "To reduce the amount of steam being produced, and in accordance with expectations, the reactor automatically tripped and was safely shut down."