LONDON (Reuters) - Britain's Torness 1 nuclear unit was taken off line at 1.22 a.m. (1222 GMT) on Tuesday, operator EDF Energy said.
EDF's website said the 640-megawatt unit would be off line for the next seven days but did not give a reason for the outage.
(Reporting by Susanna Twidale; editing by Jason Neely)