ML12039A269

Email from G. Wilson, NRR to Y. Li, NRR, Et Al; Subject: Fw:

ML12039A269
Person / Time
Site:	North Anna
Issue date:	08/24/2011
From:	George Wilson Office of Nuclear Reactor Regulation
To:	Yueh-Li Li Office of Nuclear Reactor Regulation
References
FOIA/PA-2011-0357
Download: ML12039A269 (4)

Text

.DE FOIA Resource-From: Wilson, George \'

Sent: Wednesday, August 24, 2011 6:59 PM To: Li, Yong; Khanna, Meena

Subject:

Fw:

Attachments: shakecast.reportn rc.pdf Sent fonm nrc blackberry eoree wilson (b)(6) // ,k'

-- Orig'inalMessage -- * ,_

From: Merzke. Daniel iYx;.---

To.. Wi/soi George Cc:McGint4. Tim Sent: Wed Aug 24 16:23:232011

Subject:

FWP Georga Ijustleft the Chairman'soffice / was told he wanted a one-pager on the North *,na status, which / dutifulvi generatedbasedon allthe inormaotrn /l e been pr7 pto. Unfortunate4. it 'dn'thtthe mark"#ty' understndingfrom John Moonniger iSthathe's looking for technicaldetails,specical4 iormationabout the desgn basis OEBE what numbers 0S6 saw. any calculationsNRR has donef etc I sent ap the ShakeCastbersion 6 to the Commission offices so they have that normaton. and the fact thatit appearedthat the site exceeded their design basisSSE Do you think this is somethingyou oryour folks can draft? / believe he 'sgoingto want to have somebody walk him through it,as well / told John it's late, andthere'sno way we'd have t done tonight Pleaselet me know. Thanks.

Dan

---Oriina Message-From.- Wilson, George 1 (\L Sent: Wednesday. August 24. 2011 1:53 PM To. Wilson. George: Grobe. Jack. Boger. Bruce: leeds. Eric.. Ruland. Will/am: McGkin Tin: lund Louise; Pruett Troy: lublnskI John, Wiggins Jm:J apas,Marc. McCree. Victor: Croteau.Rick: Jones William: Brown. Frederick,G&Itter. Joseph: /owe.

Allen: Evans. Michele: Holian, Brian:Skeen. David: galloway Melanie: CheoU Michael. Nelson. Robert-Bahadur.Sher:

Andersen. dames: Dean, Bil. tirgiko. /vartin: Borchardt.Bill; Weber, Michael.Johnson, Michael. folahan, gay. Metzke, Daniel Cc.. Li Yong: Karas.Rebecca., Khannl Meena: Munson, Clifford.: Kammerer. Annie: Manol. Kamal

Subject:

RE."

Information in this record was deleted in accordance witl the Freedom of Information I

Act. 21emtOf - -

MMAL 2c.-

This emailcontains an update of thegroundmotion estimateof the North Anna site basedon the latest USGS data. The currentbest estimate of the PGA for the rock is 0.2g, which containsssiniflcantuncertainty.The SSE of the North Anna WPP is 0.12g.

It shouldbe no/ed that the iti'alesthniae from. Version 1of the ShakeCastreportwas basedon verypreliminaiy information. The present Verion 6 is attached As informadon has become available.- the groundmotion estm'/ntt particular4y the location andmagnitude of earthquake hasbecome better constraied Thls is due to atershock Information and ihtensity information from the 09SS 'Vaid You Feellt?" system, which providesa level of "groundtfrthing" We justspoke to the (IS/$

and they think that the numbers havestabilized however we willprovide further updates as we receive them.

The under4/ingdatacomes from something calleda Shakeiap. which is the information that the USGS puts out to the public.

North Anna is on hardrock which may further ampli the incoming motions. It appearsthat the are many indicationsMat the SSE was exceeded, Current*.the licensee ivretrievingtheirseismic recordingistrumentation.However, we do notyet know the Wtye andquality of the recordkigdatathat will be available to the NRC Information from the RPP will be used to evaluate the USGS estInates oftgroundmotion andto compare with FAR desin basis. The data will also Worm the staff if addiifonal anoa4sis is needed

-Oriinal Message--

From: Wilson, George Sent: Wednesday. August 24, 201110:35 4M To: Grobe. Jack, Boger. Bruce" Leeds, &r1:Ruland William: McG uy, Tim: Lund Louise' Pruef Troy: LbitWskL John: Wiggs.

Jim: Dapas,Marc,Mcree, Victor. Croteau. Rick: dones. Wi/liam. Browa Frederick,:Giitter,Joseph: Howe Allen,. Evans.

Michele: Ho/ian. Brian: Skeen, DWid.' ,alloway. MeAlnie: Cheok Michael.' Nelson. Robert,' Bahadu. Sher, Andersen. James:

Dean. Bill. lilgi'o. Mfati'n Borchardt, Bilk Weber, Michael.Johnson, Michael' lolahan, Gary Cc: 6, Yong: I(aras.Rebecca.' khanna, Meena: Munson, Clifford Kammerer.Annie: Manony Kamal

Subject:

. W*.

The following attachmentincludes the following The latestshake castreportfrom the USGS- thisshows that the peakgroundmotion was. 16g The Design for North Anna is

.12g The North Anna Spectralcurvefrom Numark/FSAA andspectralcurve from earthquake. You can see where the data from the earthquakeexceeds design curve above 1Ohz.

The next picturesshows the same curve outlay from the lPEEEsubmittal.

Reg Guide 1.166 for the after earthquakeguidance.

Tbus info is s/il draft andprellmi*alya 2

-- or~lal//elseae--

ktoim ffoRa WII.SON@NRC&OP (m ý~evr e.Wi1Son@Lrcgo1 Sent: Wedrisdery, 4ugust 24, 2011 R.-44 441 To. Wilson, Cerge

Aubject, 3

[~<-,,U.S.NRC I Sha', keCast Report I Magnitude 5.8 - VIRGINIA Version 6 Origin Time: 2011-08-23 17:51:04 GMT Created: 2011-08-24 15:11:29 GMT Latitude: 37.9360 Longitude: -77.9330 Depth: 6.0 km These results are from an automated system and users should consider the preliminary nature of this information when making decisions relating :to public safety. ShakeCast results are often updated as additional or more accurate earthquake information is reported or denved.

H-~ E.nh4oo*.. Smd, FAQ PFo1J fl.Si. Log1.,* fy5 Shak&Cast Summai KVIKNn3.c4 5.0*

ID V,,GUOA M1L.O Recent significant earthquakes in the region M4.5 VIRGINIA at 12/9/2003 20:59 MapWM"*00S Pcd Nd 6052k=140*A0=&465IT- 000 I46V*WEflMVSWI

=4 PE.CCt6di NaIW1.1W,6 j gh) AMdro.I,

.17 .17-UIt*M SewqiI Vos 54.2 S.2.l5 183u Ss.-

3402 i 8S124 0*011s, Eoo.,0

.124 d~v TIii

, v vV ,

FACILITY TYPE FACILITY ID FACILITY NAME DIST LATITUDE LONGITUDE DAMAGE LEVEL MMI PGA PGV PSA03 PSAI0 PSA30 NUCLEAR JUSA37 INorth Anna 118.08 138.0573 1-77.7956 YELLOW vi 19.9918 12.2568 26.0078 5.9443 0.5989 NUCLEAR USA8 Calvert Cliffs 141.73 38.4319 -76.4424 GREEN V 6.8436 6.7083 3.5967 1.4285 0.1501 NUCLEAR USA56 Surr 139.06 37.1633 -76.6942 GREEN V 6.1296 6.5473 3.5591 1,4118 0,1482

• - MMI level may extend beyond map boundary; some facilities may not appear on the map due to space restriction