yes, by decommissioning them.
by Edano 9/8/2011 4:46:40 PM
NRC meeting is starting
by lillymunster 9/8/2011 5:00:03 PM
Bob Martin talking Meting between NRC and Dominion requested by Dominion to do a presentation on the seismic event and Dominions opinion. Meeting is category 1, public comment allowed at end of meeting
by lillymunster 9/8/2011 5:01:07 PM
Meeting announced 7th, NRC going over short notice, public feedback procedure during the meeting.
by lillymunster 9/8/2011 5:02:15 PM
Jean Greycheck from Dominion talking, in charge of regulatory response
by lillymunster 9/8/2011 5:02:39 PM
Talking about work being done, effects of earthquake on the plant. Bringing quake analysis, current findings at the plant. Schedule for their planned restart.
by lillymunster 9/8/2011 5:03:16 PM
NRC stating this meeting will give NRC idea how they will approach evaluations on N Anna going forwrd
by lillymunster 9/8/2011 5:05:24 PM
NRC review in early stages. Plant staff claim no major damage at plant. But must receive NRC approval to restart including Dominion must state under oath the findings
by lillymunster 9/8/2011 5:06:17 PM
Doing introductions, can't keep up with names. Various NRC and Dominion staff in attendance
by lillymunster 9/8/2011 5:07:36 PM
Sequence of events then seismic data. "will show that the velocity demonstrates a low enough "cAV" value to not have serious damage" Dominion rep
by lillymunster 9/8/2011 5:08:31 PM
Map of the plant vs. epicenter - 11 miles sw of NA (North Anna). at 100% power during quake. Quake, 11 seconds later both tripped negative rate flux trip. Then transformers tripped. 8 seconds later all emergency deisels started
by lillymunster 9/8/2011 5:10:51 PM
Schematic of NA power station. how reserve supply powers emergency systems. SBO deisels. Shift manager kicked in emergency action plan based on loss of offsite power and quake.
by lillymunster 9/8/2011 5:11:57 PM
Emerg diesels inspection - 48 seconds in one had coolant leak so they shut it. 15 min. later declared alert, due to 1 power supply
by lillymunster 9/8/2011 5:13:06 PM
Trying to establish offsite power, addressed transformers for faults, and safety testing.
by lillymunster 9/8/2011 5:14:08 PM
cool down unit 1 as lead unit to get seismic plate data in unit 1 location.
by lillymunster 9/8/2011 5:15:13 PM
Had to depressurize and cool down unit and depressurize containment to get the plate
by lillymunster 9/8/2011 5:15:59 PM
1am next morning aftershock, emergency action levels and checks. Started unit 2 to hot shutdown. In hot 2 residual heat removal and steam generator to remove heat.
by lillymunster 9/8/2011 5:17:09 PM
Retrived plates and sent to vendor. Got back info on 26th and validated it.
by lillymunster 9/8/2011 5:17:37 PM
Had exceeded design basis in some areas.
by lillymunster 9/8/2011 5:17:49 PM
NRC asking question: abt results on scratch plate data from auxiliary building on 8-26 that gave them design basis determination
by lillymunster 9/8/2011 5:19:01 PM
Showing slides of findings. NRC asks what caused negative flux rate trip. Dominion says they are still figuring out.
by lillymunster 9/8/2011 5:20:18 PM
negative flux rate trip is in reactor. NRC asks for list of seismic equipment and location
by lillymunster 9/8/2011 5:20:40 PM
Annuciator or control panel did not show beyond design basis event at time of quake
by lillymunster 9/8/2011 5:21:13 PM
Slide of demineralization tanks on top floor of building. Base of vessel, chipped concrete base on a tank. Damaged said pedestal
by lillymunster 9/8/2011 5:22:22 PM
Interior wall inside containment crack horizontal in wall. Says quake is usually vertical cracks. Claims crack was along a grout line for concrete pour joint.
by lillymunster 9/8/2011 5:22:51 PM
Inspection of dry casks. Pad 1 - 115 tons each. Pad 1 - 27 casks. 25 shifted, up to 4.5 inches. Describing the inner cask safety measures to keep sealed. no radiation spikes in the area. 6 pairs of casks no longer 16 feet apart for radiation heat dissipation.
by lillymunster 9/8/2011 5:25:19 PM
Aftershocks, follow up pad inspection, evaluating 2 casks that moved a second time. Checking measurments to be sure.
by lillymunster 9/8/2011 5:25:47 PM
1st quake they marked each cask for future aftershock movement. Last cask
was installed 2007.
by lillymunster 9/8/2011 5:26:26 PM
cask storage pad #2 concrete bunker horizontal storage. no damage to pad, gaps in roof blocks for the casks an non structural damage
by lillymunster 9/8/2011 5:27:10 PM
no radiation spikes in the bunker area. 26 bunkers, 13 casks in pad 2. Showing new gaps in the roof blocks of the modular cask system of the tongue and groove joint. The movement was on empty units.
by lillymunster 9/8/2011 5:28:16 PM
Bunkers for convective cooling and shielding. NRC asking significance of this movement per the objective of the bunker safety
by lillymunster 9/8/2011 5:28:54 PM
Cracking, swelling concrete on pad 2 bunker building vents
by lillymunster 9/8/2011 5:29:25 PM
Roof vent screening to keep peoople and animals out, held in place with anchor bolts was pulled out - slide shows a large chunk missing.
by lillymunster 9/8/2011 5:30:13 PM
Hendrickson speaking for dominion. they consider these to be most significant of all the damage at the plant.
by lillymunster 9/8/2011 5:30:57 PM
NRC question on tanks, no shearing of anchor bolt, how was that tested. Dominion admits they did not inspect the anchor bolts.
by lillymunster 9/8/2011 5:31:48 PM
NRC asks any anchor bolt inspections to see if failing. Dominion states only visual inspection from outside so no further bolt inspection
by lillymunster 9/8/2011 5:32:17 PM
Seismic monitoring panel explanation. Passive system and a panel system with alarms to control room. seismic trigger actuates the tape playback unit. 2 - seismic switch set to design basis, switch goes off. Playback device looks at 2 locations
by lillymunster 9/8/2011 5:33:32 PM
Ingdal system is passive, recorder and graphs and sets alarms in control room. Amber OBE, Red DBE - design basis. Also scratch plates. Kinemetrics system unit 1 containment basement floor, trigger, switch and playback cassette unit on top of containment. Ingdal system is throughout plant w/ sensors with scratch plates.
by lillymunster 9/8/2011 5:35:07 PM
X-Y_Z planes for the scratch plates with frequency recording devices like a pendulum. 12 frequencies for acceleration and scratches an arc on the plate. This gets high magnitude recording.
by lillymunster 9/8/2011 5:36:07 PM
OBE= values and DBE= values. OBE & DBE horizontal and vertical on containment.
by lillymunster 9/8/2011 5:37:07 PM
NRC asking about Ingdall alarms in the control room. These did not record anything. The panel lost power for 8 seconds and lost function of the Ingdal panel
by lillymunster 9/8/2011 5:38:16 PM
Ingdal panel does not have battery back up. Alarms didn't trip in the control room. Dominion has no clear explaination why the ingdal system didn't trip alarms
by lillymunster 9/8/2011 5:39:48 PM
The human element By Hugh Gusterson | 1 September 2011
@all Global warming could put Turkey Point nuclear reactors under water
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