NEW YORK, Sept 17 (Reuters) - As Hurricane Isabel approached North Carolina, Progress Energy Inc. (nyse: PGN - news - people) declared an unusual event at its Brunswick nuclear power plant in North Carolina, the U.S. Nuclear Regulatory Commission said in its event notification report on Wednesday.
An unusual event is the lowest of four of the NRC's emergency classifications at U.S. nuclear power plants.
A spokesman for the plant was not immediately available early Wednesday, but earlier this week, spokesman Mike McCracken told Reuters the decision to shut their nuclear units is common industry practice whenever winds in excess of about 74 mph are expected to reach the plant within two hours.
According to the NRC, a hurricane warning was issued, but there was no significant impact to the safety of the plant. The wind speed at the site was 14 miles per hour at about 11 p.m. Eastern time on Tuesday.
Storms pose little danger to reactors since they are housed in massive concrete containment buildings, easily capable of withstanding hurricane force winds.
But major storms kick up huge ocean swells that can clog cooling water intake systems at some plants. Debris hurled through the air by strong winds can also cause havoc at the plant's outdoor switchyards, where the megawatts they generate flow into high voltage lines.
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http://www.forbes.com/markets/newswire/2003/09/17/rtr1083805.html