ML12088A212

E-mail from Bill Raymond, Region I to Mike Modes, Region I; Subject: Management Briefing Status Seabrook

ML12088A212
Person / Time
Site:	Seabrook
Issue date:	03/08/2011
From:	Raymond W J Division of Nuclear Materials Safety I
To:	Chaudhary S K, Modes M C Division of Nuclear Materials Safety I
References
FOIA/PA-2012-0119
Download: ML12088A212 (4)

Text

Turilin, Andrey From: Raymond, William Sent: Tuesday, March 08, 2011 8:23 AM To: Modes, Michael; Chaudhary, Suresh Cc: Burritt, Arthur; Johnson, Jonathan

Subject:

FW: Management Briefing:

Status of Seabrook Concrete Degradation

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Original Message----

From: Raymond, William Sent: Monday, March 07, 2011 11:00 PM To: Sheikh, Abdul Cc: Modes, Michael; Dan Naus; Auluck, Rajender

Subject:

RE: Management Briefing:

Status of Seabrook Concrete Degradation I agree with Abdul. NRC should ask NextEra to do more analyses.Bill From: Sheikh, Abdul Sent: Monday, March 07, 2011 5:01 PM To: Raymond, William Cc: Modes, Michael; Dan Naus; Auluck, Rajender

Subject:

RE: Management Briefing:

Status of Seabrook Concrete Degradation I am concerned about the following statement in the email: 4. (Abdul) As covered in pending RAI -make sure planned core testing will include tensile strength (as well as compressive strength, modulus and petrographic analysis).

No. NextEra has no plans to obtain tensile strength values from the cores, since tensile strength is not in the design calculations, and there is no baseline test data to campare with for changes. NOTE -NRC MAY NEED TO REQUEST THIS IN AN RAI.My Comment: Concrete shear strength is a function of its tensile strength.

With the concrete being cracked, the tensile and shear strength of concrete will be appreciably different from the code specified values based on compressive strength.

In the design of outer perimeter walls, shear strength of concrete is an important consideration.

In addition, the capacity of anchor bolts and embeds in concrete walls are based on shear (tensile) strength of concrete.

Embeds located in cracked walls may not be capable of resisting design loads.From: Raymond, William Sent: Thursday, March 03, 2011 10:52 AM To: Modes, Michael Cc: Hiland, Patrick; Clifford, James; Weerakkody, Sunil; Burritt, Arthur; Manoly, Kamal; Cline, Leonard; Conte, Richard; Auluck, Rajender; Galloway, Melanie; Khanna, Meena; Chaudhary, Suresh; DeFrancisco, Anne;Sheikh, Abdul; Roberts, Darrell; Wilson, Peter

Subject:

RE: Management Briefing:

Status of Seabrook Concrete Degradation Mike, Jfortunately, I cannot participate on that date. Jon will cover for the residents.

Information in this record was deleted..-

in accordance with the Fr edom of Information Act, exemptions 0A ,,p'-'Qf>sft FOJA.

'-9 2 6: Mike / Suresh -draft TIA on what DE input is needed for NRC's review of NE's operability analysis for the control building -make sure staff questions on adequacy of seismic analysis are addressed (Bill -provide thought/inputs to Mike & Suresh).)utside of Scope (43 3 Enforcement

-Implications (Burritt/Raymonc TIA -Technical Issues (Modes)/IDeFrancisco) 4