ML12023A263

Lr - FW: Davis Besse Teleconference Call RAI B.2.4-4

ML12023A263
Person / Time
Site:	Davis Besse
Issue date:	01/23/2012
From:	Office of Nuclear Reactor Regulation
To:	Division of License Renewal
References
Download: ML12023A263 (3)

Text

Davis-BesseNPEm Resource From: CuadradoDeJesus, Samuel Sent: Monday, January 23, 2012 3:42 PM To: Davis-BesseNPEm Resource

Subject:

FW: Davis Besse teleconference call RAI B.2.4-4 Attachments: Davis Besse teleconference call RAI B.2.4-4.pdf 1

Hearing Identifier: Davis_BesseLicenseRenewal_Saf_NonPublic Email Number: 3201 Mail Envelope Properties (0046140293E11F408991442DB4FE25CA68D20D29BA)

Subject:

FW: Davis Besse teleconference call RAI B.2.4-4 Sent Date: 1/23/2012 3:42:06 PM Received Date: 1/23/2012 3:42:08 PM From: CuadradoDeJesus, Samuel Created By: Samuel.CuadradoDeJesus@nrc.gov Recipients:

"Davis-BesseNPEm Resource" <Davis-BesseNPEm.Resource@nrc.gov>

Tracking Status: None Post Office: HQCLSTR01.nrc.gov Files Size Date & Time MESSAGE 3 1/23/2012 3:42:08 PM Davis Besse teleconference call RAI B.2.4-4.pdf 75339 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

Davis-BesseHearingFile Resource

Subject:

Davis Besse teleconference call RAI B.2.4-4 Location: HQ-OWFN-08B02-12p Start: Wed 6/29/2011 1:00 PM End: Wed 6/29/2011 2:00 PM Show Time As: Tentative Recurrence: (none)

Meeting Status: Not yet responded Organizer: CuadradoDeJesus, Samuel Required Attendees: 'dorts@firstenergycorp.com'; custerc@firstenergycorp.com; Sun, Robert Resources: HQ-OWFN-10B06-12p; HQ-OWFN-11B02-12p; HQ-OWFN-11B06-12p; HQ-OWFN-09B02-12p; HQ-OWFN-09B06-12p; HQ-OWFN-07B02-12p; HQ-OWFN-07B04-25p; HQ-OWFN-07B06-12p; HQ-OWFN-08B06-12p Phone and passcode coming soon. Robert please forward the request to Liz Conference call with Davis Besse to discuss their response to RAI B.2.4-4 (received 6/24/11). The issue that we have is described below:

LRA Tables 3.2.2-1, 3.2.2-3, 3.2.2-4, 3.3.2-5, 3.3.2-7, 3.3.2-8, 3.3.2-11, 3.3.2-14, 3.3.2-16, 3.3.2-18, 3.3.2-23, 3.3.2-24, 3.3.2-25, 3.3.2-26, 3.3.2-31, 3.4.2-1 include AMR line items for both loss of material and for cracking in stainless steel bolts exposed to air with steam or water leakage (external) managed by the Bolting Integrity Program. In these same tables, a third related AMR line item exists for loss of preload in stainless steel bolts exposed to air-indoor uncontrolled (external).

Based on the response to RAI B.2.4-4 (6/24/11), it appears that the bolts described in the 3 coupled line items are the same components, and thus all expected aging effects (Loss of material, cracking, loss of preload) are accounted for, however it is not clear as a result of the different environments listed for these line items in the LRA. If all 3 coupled line items described the same component, then why are different environments used?

Another possibility is that the 3 coupled line items describe components with some but not complete overlap, where certain bolts are managed for LOM, cracking and LOP, and others are only managed for LOP. If this were the case, then additional clarification or LRA updates would still be needed since LOM is still an expected aging effect for stainless steel bolting in an air-indoor uncontrolled (external) environment (see GALL item V.E.EP-70) 1