Heysham Power Station offline status 'routine'
Wednesday, 3 November 2010
One of Heysham nuclear reactors was taken offline on Monday after what owners EDF Energy called an "unplanned outage" - but the power station has categorically denied internet rumours that it was caused by a computer virus.
"We took unit 2 at Heysham 1 off line on 1st November to carry out a routine repair," a spokesperson for the Station told virtual-lancaster.
It's not known when the reactor will be back in action.
"Because of the effect of speculation on the wholesale electricity market, we don't give technical causes or forecast return to service dates for commercial reasons," But it's not an unusual event and there are absolutely no safety implications."
Rumours began to circulate that the reactor's operating systems had been bit by a computer virus, but this has been denied.
"There is absolutely no link between the cause of Heysham 1's trip, and any 'cyber security' issues," the spokesperson added.
Heysham 1's two reactors returned to service in March 2009 following a 17-month outage. The pair are capable of supplying 1,160 megawatts, or enough energy for more than 1.5 million homes.
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Parts of the site are run by Siemens S7 systems, which prompted suggestions the sophisticated Stuxnet worm was to blame for the shutdown. An EDF spokeswoman told tech site The Register that the suggestions amounted to "conspiracy theories". "I can confirm that on Heysham 1 there is no Siemens S7 equipment in any safety-related applications," she said.
The sophistication of Stuxnet - the EU information security agency ENISA called it "a new class and dimension of malware" - led many to believe it had been created by a state intelligence agency, possibly to disrupt Iran's civilian and military nuclear programme.
Siemens and Microsoft have since released patches to secure their software.
To date there is no evidence that Stuxnet has affected any British facilities.
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