ML12047A368

E-mail from M. Khanna, NRR to J. Uribe, NRR Re Query: One Pager on North Anna Earthquake Issue

ML12047A368
Person / Time
Site:	North Anna
Issue date:	09/11/2011
From:	Meena Khanna Plant Licensing Branch II
To:	Juan Uribe NRC/NRR/DE/EMCB
References
FOIA/PA-2011-0357
Download: ML12047A368 (2)

Text

Uribe, Juan I 8/

-From: Khanna, Meena Sent: Sunday, September 11, 2011 9:08 PM To: Uribe, Juan

Subject:

FW: Query: One Pager on North Anna Earthquake Issue See below...for another question for the comm. plan From: Leeds, Eric Sent: Saturday, Seprmber 10, 2011 12:04 PM To: Manoly, Kamal Cc: Khanna, Meena; Hiland, Patrick; Wilson, George; Li, Yong

Subject:

Re: Query: One Pager on North Anna Earthquake Issue Great answer! Thanks kamal - enjoy the weekend!

From: Manoly, Kamal ýýNU.I To: Leeds, Eric Cc: Khanna, Meena; Hiland, Patrick; Wilson, George; Li, Yong Sent: Fri Sep 09 18:16:31 2011

Subject:

RE: Query: One Pager on North Anna Earthquake Issue The question Icurrently have is how does the Mineral Va. earthquake impact what we were doing with regard to GI-199? Was the earthquake "bounded" by the GI-199 information or do we need to re-assess what we need licensee's to analyze for their plants?

Eric, The ground motion estimates from the earthquake in VA strongly appear to validate the NRC's current seismic hazard assessment approaches and the basis for GI-199 reviews. When the new hazard estimates for performing the GI-199 GL evaluations become available, the ground motion estimate at the NA site will definitely bound the VA earthquake response spectrum measured at the plant. My expectation is that the licensee's long term action will, in some fashion, refer to its future response to the GL as a means to ascertain its seismic adequacy and desired CDF of 1OE-5 or less. Whether the GI-1 99 ground motion (GMRS) should become the new seismic design basis for the plant, that is a regulatory decision that we need to ponder carefully before rushing into a decision at this stage.

Kamal From: Khanna, Meena Sent: Friday, September 09, 2011 5:31 PM To: Manoly, Kamal

Subject:

FW: Query: One Pager on North Anna Earthquake Issue From: Leeds, Eric Sent: Friday, September 09, 2011 5:29 PM To: Khanna, Meena; Hiland, Patrick; Wilson, George Cc: Grobe, Jack

Subject:

Query: One Pager on North Anna Earthquake Issue 58

Pat & Co. -

Eric J. Leeds, Director Office of Nuclear Reactor Regulation

" U.S. Nuclear Regulatory Commission 301-415-1270 From: Khanna, Meena Sent: Friday, September 09, 2011 4:38 PM To: Bowman, Gregory Cc: Grobe, Jack; Boger, Bruce; Leeds, Eric; Ruland, William; McGinty, Tim; Lund, Louise; Pruett, Troy; Lubinski, John; Wiggins, Jim; Dapas, Marc; McCree, Victor; Croteau, Rick; Jones, William; Giitter, Joseph; Howe, Allen; Evans, Michele; Holian, Brian; Skeen, David; Galloway, Melanie; Cheok, Michael; Nelson, Robert; Bahadur, Sher; Andersen, James; Dean, Bill; Virgilio, Martin; Borchardt, Bill; Weber, Michael; Johnson, Michael; Holahan, Gary; Merzke, Daniel; Sanfilippo, Nathan; Hayden, Elizabeth; Chokshi, Nilesh; Wert, Leonard; Hiland, Patrick; Skeen, David; Li, Yong; Manoly, Kamal; Wertz, Trent; Martin, Robert; Thomas, George; Taylor, Robert; Franke, Mark; Boyle, Patrick; McCoy, Gerald; Wilson, George; Benner, Eric; Ordaz, Vonna; Weaver, Doug

Subject:

One Pager on North Anna Earthquake Issue Greg, As requested, attached is an update to the One Pager on the North Anna Earthquake issue.

Thanks, Meena Khanna, Branch Chief Mechanical and Civil Engineering Branch Division of Engineering Office of Nuclear Reactor Regulation (301)415-2150 meena.khanna@nrc.qov 59