Repairs are expected to take place at Hartlepool nuclear power station after an oil leak and small fire on lagging around a turbine in one of the reactors.
It was being brought back into service. Owners EDF say there was no danger to the public.
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The pair defrauded Durham County Council out of nearly £100,000 but were given suspended sentences.
Gascoigne is alleged to have sent abusive tweets, text messages and telephone calls to Amanda Thomas in March this year.
The Black Cats are attempting to find their seventh permanent boss since the Irishman's departure.