My Zimbio
Top Stories

Tuesday, August 30, 2011

Virginia nuclear plant inspected for earthquake damage

The North Anna Power Station operated by Dominion Energy remains offline after losing offsite power in the wake of last weeke's 5.8 earthquake.
nukes The North Anna Power Station operated by Dominion Energy remains offline after losing offsite power in the wake of last weeke's 5.8 earthquake.
Scott Olson/Getty Images
WASHINGTON Inspectors dispatched by the Nuclear Regulatory Commission arrived at Virginia’s North Anna nuclear power plant Tuesday on a three-week mission to assess any damage caused by last week’s earthquake, which was centered 12 miles from the dual-reactor facility.
On Friday, the plant’s operator, Dominion Virginia Power, informed the NRC that the ground motion produced by the 5.8 magnitude quake “may have exceeded” the amount of shaking the plant was designed to withstand.
That notice prompted the deployment of the NRC team, which will also focus on why the plant lost primary electrical power for several hours and how the plant’s operators responded to the situation, said Roger Hannah, a spokesperson for the NRC’s southeast region.
The inspection is unusual, said Scott Burnell, a spokesman for NRC. Such “augmented inspection teams” are dispatched to nuclear plants “infrequently. If I had to put a number on it I’d say once every couple of years.”
During the quake, 36 “scratch plates” at the facility recorded ground motion in three dimensions, said Richard Zuercher, a Dominion spokesman. Preliminary analysis of the plates performed by a seismologist contracted by Dominion showed “the plant may have exceeded design basis for ground-force acceleration,” Zuercher said.
The plant’s reactor containment buildings were built to withstand shaking equal to 12 percent of the force of gravity. Dominion said on the day of the quake that the plant would be safe up to a magnitude 6.2 earthquake. But the amount of shaking such a quake produces varies with distance to the epicentre, depth and the type of rock the quake occurs in.
Zuercher would not provide details on the amount of shaking revealed by the preliminary analysis. “We want to know for sure what we have,” he said, adding that Dominion would make available a fuller analysis of the shaking by the end of the week.
“There’s been no serious damage to any safety-related equipment,” Zuercher said of the company’s inspections to date. “Everything is fine. We have had some minor damage insulation on pipes, ceiling tiles in offices, cracks in walls that were really not structural.”
If the shaking did exceed what the plant was designed to withstand, it would mark the first such event at an operating reactor in the United States, said Edward Blandford, a reactor safety expert at the Center for International Security and Cooperation at Stanford University.
Blandford noted that nuclear plants add safety margins to their designs. “An elevator makes a good analogy,” he said. “If you exceed a 500-pound weight limit by 10 pounds it doesn’t suddenly fail.”
He pointed to a July 2007 earthquake in Japan that shook the Kashiwazaki-Kariwa nuclear power plant with a force 2½ times greater than the facility was designed for. After inspections, the International Atomic Energy Agency concluded that the plant’s safety design margins prevented major damage. The plant was subsequently closed for 21 months for seismic upgrades.
The North Anna plant’s reactors remain shut down and are not generating electricity.


Global Rumblings depends heavily upon the the support that you provide by clicking on and purchasing products that are advertised here. Without your support, this site could not sustain itself because it takes time and money to stay on the internet. 

NWO Vision Report Watch  click here 

The Anti-Christ Identity? Can we know it now? Click Here

2012 - The Untold Story Click Here

How to survive the Coming Food Crisis Click Here

SEW? Get FREE SHIPPING on orders $35+ from

AquaPonics Grow Vegetables without Dirt.

Survival Farming Click Here!

Roy's GhP Anti-Aging: Regain your Strength at any age. 

Friday, July 22, 2011

Search & Win

No comments:

Post a Comment

10 Day Weight Loss Pills

Popular Posts



Curious about what the future holds? Click here to find out how you can receive a 10 minute psychic reading from Psychic Source. - The Best Free Online CalculatorŠ½

Fine Art - Painting Lessons: Real Art!
What is Bio-Farming? Can anyone do it?
Related Posts Plugin for WordPress, Blogger...

My Zimbio
Top Stories
My Zimbio
Top Stories Get 100 FREE Visitors to Your Website!
eXTReMe Tracker
AyurCat for Cat Health Care