ML103140700

Lr - Draft RAI Set 34 AMP

ML103140700
Person / Time
Site:	Diablo Canyon
Issue date:	11/10/2010
From:	Office of Nuclear Reactor Regulation
To:	Division of License Renewal
References
Download: ML103140700 (3)

Text

DiabloCanyonNPEm Resource From: Ferrer, Nathaniel Sent: Wednesday, November 10, 2010 4:10 PM To: Grebel, Terence Cc: DiabloCanyonNPEm Resource

Subject:

Draft RAI Set 34 AMP Attachments: Draft RAI Set 34 AMP follow-ups.doc

Terry, Attached is Draft RAI Set 34 containing draft RAIs, specifically on portions of aging management programs.

Please review the attached draft RAIs and let me know if and when you would like to have a teleconference call. The purpose of the call will be to obtain clarification on the staff's request.

Please let me know if you have any questions.

Nathaniel Ferrer Project Manager Division of License Renewal Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission (301)4151045 1

Hearing Identifier: DiabloCanyon_LicenseRenewal_NonPublic Email Number: 2169 Mail Envelope Properties (26E42474DB238C408C94990815A02F0913677F2D50)

Subject:

Draft RAI Set 34 AMP Sent Date: 11/10/2010 4:09:57 PM Received Date: 11/10/2010 4:10:00 PM From: Ferrer, Nathaniel Created By: Nathaniel.Ferrer@nrc.gov Recipients:

"DiabloCanyonNPEm Resource" <DiabloCanyonNPEm.Resource@nrc.gov>

Tracking Status: None "Grebel, Terence" <TLG1@pge.com>

Tracking Status: None Post Office: HQCLSTR01.nrc.gov Files Size Date & Time MESSAGE 549 11/10/2010 4:10:00 PM Draft RAI Set 34 AMP follow-ups.doc 60922 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

Diablo Canyon Nuclear Power Plant, Units 1 and 2 (DCPP)

License Renewal Application (LRA)

Draft Request for Additional Information Set 34 Aging Management Programs D-RAI B2.1.32-1 (follow-up)

Background:

By letter dated September 30, 2010, the applicant responded to follow-up RAI B2.1.32-1 regarding the Structures Monitoring Program acceptance criteria. In the response, the applicant stated that prior to the period of extended operation, the acceptance criteria for concrete structural elements for safety-related structures will be revised to incorporate the quantitative evaluation criteria provided in ACI 349.3R.

Issue:

The qualitative acceptance criteria should apply to all concrete elements within the scope of the Structures Monitoring Program; however, the applicants response only addresses safety-related structures. In addition, the response makes no mention of conducting a baseline inspection with qualitative acceptance criteria. In order to properly monitor and trend structural degradation during the period of extended operation, a baseline inspection in accordance with ACI 349.3R acceptance criteria, must be completed prior to the period of extended operation.

Request:

1) Update the acceptance criteria for all in-scope concrete elements or justify why it is not needed.

2) Provide plans and a schedule to conduct a baseline inspection in accordance with the ACI 349.3R acceptance criteria prior to the period of extended operation, or justify why a baseline inspection is not needed.