Satoshi Sato, Nuclear Engineer, April 28, 2015 (emphasis added): “I don’t know if you remember, there was the earthquake in 2011 in Virginia. That was a big one… enough to cause vibration to the North Anna reactor resulting in a big spike of neutron flux — or reactor power… and somehow caused the additional . . . → Read More: Japan Nuclear Engineer: US reactor at risk of ‘supercriticality’ during recent emergency… “That’s something scary” — Damaged nuclear fuel rods and fuel fragments found at plant, conditions reported as “seriously degraded” (VIDEO)
Title: Elevated radioactivity levels found in North Anna well Source: Richmond Times-Dispatch Author: PETER BACQUÉ Date: February 22, 2012
[... North Anna operator] Dominion Virginia Power is not sure where the radioactivity is leaking from, but the two reactors at the Louisa County plant are not the source [...]
“There is no evidence that . . . → Read More: North Anna: 53,300 picocuries per liter detected — Not sure where radiation is leaking — “No evidence” that increase in radioactivity related to quake says spokesman
Title: Radioactive groundwater detected at Va power plantSource: APDate: Feb 22, 2012 Dominion Virginia Power is seeking the source of leaking radioactivity at its North Anna nuclear power plant Elevated level of tritium was detected in groundwater Company spokesman [says] two reactors aren’t the source of the leak Tritium in water taken from an . . . → Read More: AP: Quake-hit North Anna nuke plant leaking radioactivity
Nov. 6 — The quake-hit North Anna nuclear plant in Virginia has yet to restart, and the Washington Post provides some answers for the delay.
According to the NRC’s lead inspector at North Anna, “Reviews are in progress. However, the staff has not identified any significant safety concerns” after the quake.
The NRC official . . . → Read More: WaPo: NRC directs quake-hit North Anna nuke plant to inspect supports for Reactor Pressure Vessel — No “significant” problems?
SOURCE: 4 generator failures hit US nuclear plants, AP, October 9, 2011:
Four generators that power emergency systems at nuclear plants have failed when needed since April, an unusual cluster that has attracted the attention of federal inspectors [...]
[D]iesel generators serve the crucial function of supplying electricity to cooling systems that prevent a . . . → Read More: AP: 4 diesel generator failures hit US nuclear plants — Prevents meltdown during power outage, like Fukushima
Shaking caused plant shutdown, Free Lance Star (Virginia), September 29, 2011:
Dominion reveals more about quake impact at North Anna in letters to NRC
[...] The NRC also asked Dominion whether there was any damage to fuel in the reactors. The fuel is thumbnail-size uranium dioxide pellets loaded into metal alloy . . . → Read More: Feds question whether there was damage to fuel in reactors at quake-hit North Anna nuke plant — The answer may surprise you
North Anna Nuclear Generating Station SOURCE: Wikipedia
Weeks after quake, town near nuclear plant remains rattled, USA TODAY By Wendy Koch. September 18, 2011:
[...] “You can’t not think about it,” says customer [at Sweet Delights Bakery] Roger Tignor, about the recent magnitude-5.8 quake that jolted the North Anna Power Station 11 miles . . . → Read More: USA Today on North Anna: “A lot of people think they’ve hid stuff from us” — “Even if they’re not good to go, they won’t tell us” — “I was and am still worried”
NRC rejects quick restart at Virginia nuclear plant, Reuters, September 9, 2011:
[... D]uring a public meeting on Thursday to discuss the Aug. 23 earthquake [...] Dominion officials said it now appears the reactors shut when the earthquake caused a problem inside the cores at both units rather than from the loss of outside . . . → Read More: Reuters: It now appears quake caused problem inside both reactor cores at North Anna, triggering shutdown -Officials
When an Earthquake Shuts a Reactor, New York Times blog by Matthew L. Wald, September 8, 2011:
[...] So while an interruption of power from the transformer would have shut down the [North Anna nuclear] plant, this now appears not to have been the first event in the sequence.
Rather, the reactors themselves seem . . . → Read More: “Reactors themselves seem to have undergone changes that caused automatic systems to shut them” -North Anna Official
After Quake, Virginia Nuclear Plant Takes Stock, The New York Times by Matthew L. Wald, September 7, 2011:
[T]he North Anna nuclear plant finds itself in a situation that no American reactor has ever faced before.
The shock was bigger than anything its designers thought it would ever experience [...]
The situation is so . . . → Read More: NYT: North Anna nuke plant in situation that no US reactor has ever faced before — NRC has no protocol to see if design held up after quake
Quake’s jolts were double nuke plant’s design, USA Today by Wendy Koch, September 7, 2011:
The 5.8-magnitude earthquake last month in Virginia caused about twice as much ground shaking as a nearby nuclear power plant was designed to withstand, according to a preliminary federal analysis.
Parts of the North Anna Power Station in Mineral, . . . → Read More: Quake over twice as strong as North Anna nuke plant’s containment structure was designed to withstand: Feds
Arnold Gundersen with a Fukushima update, Helen Caldicott MD podcast, September 2, 2011:
At 5:00 in (Transcript Summary) People in the area didn’t lose electricity, only at North Anna plant… best info is that there was a problem in the switching yard.
Download the audio program here.
Dominion: North Anna Reactors Won’t Restart Until Safety Assured, AP, September 5, 2011: Emphasis Added
[...] “The plant is safe, we have seen no significant damage from any of our inspections thus far, there was no release of radioactivity,” said Dan Stoddard, senior vice president of nuclear operations for Dominion.
Officials are . . . → Read More: North Anna: Officials unsure whether control rods fell into reactor core due to shaking or loss of power
At North Anna nuclear plant, reassurances but no final data on quake impact, Washington Post by Brian Vastag, September 2, 2011:
[...] Dominion expects to build the new plant [a third reactor at North Anna]. On Friday, bulldozers moved dirt in early preparations for the reactor’s containment building, designed to be sturdier than the . . . → Read More: Bulldozers begin working on new reactor at quake-hit Virginia nuke plant built on fault line
Yet nearly two weeks after the quake, Dominion officials were unable to say whether the quake shook the facility more than it was designed to handle . . . → Read More: WaPo: One week delay in revealing whether quake exceeded North Anna’s design basis — Seismic detector failed to record data
Cause of shutdown at North Anna nuclear plant sought, Richmond Times-Dispatch by Peter Bacque, September 3, 2011:
Knowing precisely what prompted the shutdown of [North Anna's] two 980-megawatt reactors is critical for validating the safety of the plant’s design. [...]
The quake shut down the plant’s two reactors, an unprecedented event in the United . . . → Read More: Officials change story about why North Anna reactors went into automatic shut down after quake — “There were multiple trip signals coming in”
June Allen’s foresight on North Anna, Washington Post by Peter Galuszka, September 2, 2011:
[...] Now, according to an Associated Press investigation, the earthquake dangers faced at North Anna are seen as 38 percent more likely to cause damage to the cores of the two nuclear reactors at the plant than thought 20 years . . . → Read More: Deleted: Major fault line found after wall collapsed during construction of North Anna nuke plant
Dominion Says Crack Found at North Anna Containment Building, Bloomberg, September 2, 2011:
Dominion Resources Inc. found a small crack on a wall with “no safety significance” in a room of a containment building at the North Anna nuclear plant [...]
Dominion discovered a “cosmetic” crack in a horizontal construction joint on a wall . . . → Read More: Bloomberg: Crack in reactor containment structure at quake-hit Virginia nuke plant — Press tour not taken to see in containment or spent fuel pool building
“He heard a roar from the power plant and saw some black smoke rising” . . . → Read More: Black smoke seen rising from North Anna nuclear plant after Virginia quake
Inspectors check Virginia nuclear plant for earthquake damage, Washington Post by Brian Vastag, August 31, 2011:
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 . . . → Read More: Time.com: “Augmented Inspection Team” is only used when risk of reactor core damage rises by 100 — AIT already at quake-hit North Anna nuke plant
Officials: Virginia quake shifted nuclear plant’s storage casks, CNN by Brian Todd, September 1, 2011 at 10:20 am EDT:
Twenty-five of 27 spent-fuel storage casks at a Virginia nuclear plant were shifted between 1 and 4 inches during last week’s 5.8-magnitude earthquake, officials said Thursday. [...]
Besides those casks, which are vertical, some of . . . → Read More: Spokesman: Quake damaged North Anna’s spent fuel bunkers; Concrete came loose — Not considered ‘serious’