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NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!

 
DoorBert
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08/30/2011 11:12 AM
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NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
[link to enenews.com]


The earthquake last Tuesday in Virginia may have produced stronger shaking at the North Anna nuclear plant than the reactors were designed to withstand, and the Nuclear Regulatory Commission has sent additional inspectors to determine what steps are needed to determine if there is damage. [...]

Cases of reactors experiencing bigger ground motions than the designers had anticipated are rare, industry experts said.

The commission announced Monday that it was sending an “augmented inspection team,” which is expected to be on site for several weeks. Sending the team “should not be interpreted to mean that Dominion staff responded inappropriately or that the station is less safe as a result of the quake,” said Victor McCree, the commission’s administrator for the region that includes Virginia. [...]



[link to www.nytimes.com]
DoorBert (OP)

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08/30/2011 11:24 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
Quake-hit Virginia nuclear reactors "in an unanalyzed condition that significantly degrades plant

Data shows quake may have exceeded design basis


[link to www.nrc.gov]


Power Reactor Event Number: 47201
Facility: NORTH ANNA
Region: 2 State: VA
[...]
Event Date: 08/26/2011
Event Time: 13:00 [EDT]
[...]
Event Text
UNANALYZED CONDITION BASED ON SEISMIC ACTIVITY THAT POTENTIALLY EXCEEDED DESIGN BASIS EARTHQUAKE MAGNITUDE

On August 23, 2011 at 1351 hours, North Anna Power Station experienced a seismic activity event which resulted in a loss of offsite power and automatic reactor trip of both units. At 1403 hours, an Alert was declared. based on Shift Manager judgment, due to significant seismic activity on the site. Subsequent to the earthquake, both units were stabilized and offsite power was restored. Following the event, seismic data was retrieved from the installed monitoring system and shipped to the vendor to determine the response spectrum for the event. On August 26, 2011 at 1340 hours, initial reviews of the data determined that the seismic activity potentially exceeded the Design Basis Earthquake magnitude value above 5 Hz. Therefore, this is reportable per 10CFR50.72(b)(3)(ii) (B) for the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety.

North Anna Unit 1 is currently in Cold Shutdown with the Residual Heat Removal System providing core cooling. North Anna Unit 2 is currently in Hot Shutdown and will be taken to Cold Shutdown with the Residual Heat Removal System providing core cooling. No significant equipment damage to Safety Related system (including Class 1 Structures) has been identified through site walk-downs nor has equipment degradation been detected through plant performance and surveillance testing following the earthquake. Therefore, there is reasonable assurance that the Safety Related systems are fully functional. [...]
DoorBert (OP)

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08/30/2011 04:36 PM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
[link to www.nytimes.com]


WASHINGTON — The earthquake last Tuesday in Virginia may have produced stronger shaking at the North Anna nuclear plant than the reactors were designed to withstand, and the Nuclear Regulatory Commission has sent additional inspectors to determine what steps are needed to determine if there is damage. No significant damage has been identified so far.

Both reactors shut down automatically because the earthquake, which was centered about 10 miles away, disrupted access to off-site power supplies. Both are now in “cold shutdown,” which means that their fuel is no longer producing much heat and the cooling water temperature is below 212 degrees.

The plant owner, Dominion, reported to the Nuclear Regulatory Commission on Friday that the plant was in an “unanalyzed condition” because preliminary laboratory analysis of a mechanical sensor called a scratch plate showed that the ground motion “potentially exceeded” the level for which the plant was designed.
DoorBert (OP)

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08/31/2011 07:26 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
Nuclear Expert: Quake-hit Virginia nuke plant should be distributing bottled water to nearby residents — Pipes under North Anna are potentially a grave public danger


[...] On Monday, August 29, the federal Nuclear Regulatory Commission announced that the quake may, in fact, have produced force that exceeded the North Anna plant’s specifications and that the Commission is sending a special Augmented Inspection Team to assess the damage.

“Initial reviews determined the plant may have exceeded the ground motion for which it was designed,” says the release, which also assures that “no significant damage to safety systems has been identified.” [...]

[The] newly arrived government inspectors won’t be conducting their own tests of the miles of underground pipes. And the assumption that those pipes didn’t sustain damage during the earthquake, which knocked two Louisa County schools out of commission and caused cracks in the Washington Monument some 90 miles away, might be laughable to [Paul Gunter, director of a nonprofit group called Beyond Nuclear] if he weren’t convinced of potentially grave public danger. [...]


More from Gunther:

“Central to the issue is miles of buried pipe under the plant that carry radioactive water.”

“Here’s an industry that has hidden these leaks that is now self-reporting and overseeing itself to the NRC.”

“How can an uninspectable, inaccessible buried pipe have integrity?”

“Given the industry history and what’s been done before, Dominion should be distributing bottled water to the town of Mineral and to the residents of Lake Anna [...] Indefinitely.”


[link to www.readthehook.com]
Anonymous Coward
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09/01/2011 04:39 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
"How can an uninspectable, inaccessible buried pipe have integrity?"

[link to www.readthehook.com]
 Quoting: DoorBert


Good link.
DoorBert (OP)

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09/01/2011 06:53 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
Unprecedented: Quake caused massive containers of spent fuel to shift at Virginia nuke plant — “We’re trying to learn as much as possible” says NRC



[link to fredericksburg.com]

In another indication of the power of last week’s magnitude-5.8 earthquake, officials at North Anna Power Station said yesterday that 25 of 27 vertical steel casks that hold highly radioactive spent fuel shifted on their pads.

Richard Zuercher, spokesman for Dominion power’s nuclear operations, said none is leaking, all are intact, and there is no danger to the public or plant employees.

“The earthquake did move, slightly, some of the dry storage casks on the pad,” he said. The steel casks, which weigh up to 115 tons when loaded, shifted between an inch and 4 inches.

“We’re evaluating whether we need to move them back,” Zuercher said. [...]



[link to www2.timesdispatch.com]

The shifting of these massive casks holding used nuclear fuel was the first caused by an earthquake in the U.S., according to the U.S. Nuclear Regulatory Commission. [...]

“The information available indicates the shifting did not affect safety in any way,” [NRC spokesman Scott Burnell] said. “It is an instance of an event we had not previously seen, so were [sic] trying to learn as much as possible.” [...]

Last week’s magnitude-5.8 earthquake shook protective electrical devices at the North Anna Power Station strongly enough to cause the plant to shut down automatically, the first time this has occurred in the United States.

The power station remained out of service Wednesday as company and NRC officials continued detailed inspections [...]
DoorBert (OP)

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09/01/2011 06:56 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
3.4 aftershock

3 miles deep


[link to www.nbcwashington.com]


[link to earthquake.usgs.gov]

[link to quakes.globalincidentmap.com]
Anonymous Coward
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09/01/2011 07:04 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
When they say don't worry, it's safe, RUN!
Anonymous Coward
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09/01/2011 07:06 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!


Here is another link for you [link to folkworm.ceri.memphis.edu]
DoorBert (OP)

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09/01/2011 07:07 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!


Here is another link for you [link to folkworm.ceri.memphis.edu]
 Quoting: Anonymous Coward 1414556




THANKS!
DoorBert (OP)

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09/01/2011 10:58 AM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
Strong aftershock jolts quake-hit Virginia reactors — Epicenter in same county as North Anna nuke plant


[link to www2.dailyprogress.com]
DoorBert (OP)

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09/01/2011 04:38 PM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
“Augmented Inspection Team” is only used when risk of reactor core damage rises by a factor of ten!




Footage of the quake from inside a Virginia school:

[link to www.wtvr.com]



[link to ecocentric.blogs.time.com]

[...] First, a note on how the reactor oversight process works in the U.S.: When an event occurs at a reactor, or when NRC inspectors discover damage or degraded equipment, the NRC undertakes a review of the risk to the reactor. The NRC undertook 200 such reviews in 2010, the UCS report states. When an event or condition increases the chance of reactor core damage by a factor of 10, then the NRC sends out a “Special Inspection Team” (SIT). When the risk rises by 100, the agency dispatches an “Augmented Inspection Team“. And when the risk increases by 1000 or more, the NRC sends out an “Incident Inspection Team.” [...]


[link to www.washingtonpost.com]

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 [...]

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.” [...]

[Richard Zuercher, a Dominion spokesman] would not provide 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. [...]
DoorBert (OP)

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09/01/2011 04:41 PM
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Re: NUCLEAR BREAKING ALERT: NRC sending special inspection team to quake-hit Virginia nuke plant -- To remain on-site for weeks!!!!
Sorry - correction.

They sent the team out because risk of reactor core damage has been increased by a factor of 100 or higher.

News








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