Sandy Shutdowns Spur Biggest Nuclear Output Loss Since 2003

Tuesday, 30 Oct 2012 01:30 PM


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Hurricane Sandy shut down at least three nuclear reactors in the Northeastern region, sending U.S. nuclear-power output lower by the most since 2003.

Generation nationwide declined by 6.4 percent to 69,640 megawatts, or 68 percent of capacity, the biggest slide since Aug. 15, 2003, according to U.S. Nuclear Regulatory Commission data compiled by Bloomberg. Output was 17 percent lower than a year ago with 28 of 104 nuclear reactors offline.

Sandy, the Atlantic superstorm that came ashore in southern New Jersey late yesterday and blacked out southern Manhattan, shut Entergy Corp.’s Indian Point 3 reactor, Constellation Energy Group Inc.’s Nine Mile Point Unit 1 and Public Service Enterprise Group’s Salem 1 plant. With a combined capacity of 2,820 megawatts, the units account for about 11 percent of the total in the Northeast.

Indian Point 3 and Nine Mile 1 are located in New York, while Salem is situated in New Jersey.

The 1,025-megawatt Indian Point 3, located about 27 miles (43 kilometers) north of New York City, tripped offline at 10:41 p.m. yesterday when the connection between a generator on site and another off site was lost, according to a company statement. Indian Point 2 continued to operate at full power.

Electrical Disturbance

“If the generator has no place to send its power, it shuts down automatically and by design to protect itself from electrical damage,” Jerry Nappi, an Entergy Corp. spokesman, said in an e-mail today. “At Indian Point yesterday, the river level and wind had no impact on plant operation. There were also no issues with debris in the river.”

Nine Mile Point 1, a 621-megawatt reactor near Oswego, New York, was automatically shut down when a lightning pole was blown over into electrical components, Jill Lyon, a Constellation spokeswoman, said by phone today.

Off-site power was restored at about 3:30 a.m., though Unit 1 still remains offline, she said. There is no timeline for restart and unit 2 continues to operate at 100 percent of capacity.

Public Service manually shut down its 1,174-megawatt Salem 1 reactor near Wilmington, Delaware, when four of the station’s six water circulating pumps became unavailable because of the storm, Joe Delmar, a company spokesman, said today. The circulating pumps use the Delaware Bay/River to condense steam.

There is no estimated time for restart of Unit 1, Delmar said, noting that Unit 2 is offline for refueling. Public Service suspended all refueling work on Oct. 28 as Hurricane Sandy approached the U.S. East Coast.

‘Biggest Challenge’

“The biggest challenge overnight was waves hitting the circulating water systems at both stations,” Delmar said in an e-mail responding to questions today. There was “lots of river grass and debris,” he said.

The 1,061-megawatt Hope Creek 1 unit, also operated by Public Service and located near Wilmington, is stable and operating at full power, Delmar said.

The three shutdowns were the biggest declines in nuclear power in the Northeastern region, where generation dropped 24 percent to 13,835 megawatts, according to commission data compiled by Bloomberg. That’s the region’s lowest production level since 1998 as nine reactors are offline.

Reactor maintenance shutdowns, usually undertaken in the U.S. spring or fall when energy use is lowest, can increase consumption of natural gas and coal to generate electricity. The average refueling down time was 43 days in 2011, according to the Nuclear Energy Institute.

© Copyright 2014 Bloomberg News. All rights reserved.

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