ML11307A019

2011/07/27 Seabrook Lr - FW: August 3rd, 2011, Teleconference Topics of Discussion

ML11307A019
Person / Time
Site:	Seabrook
Issue date:	07/27/2011
From:	Office of Nuclear Reactor Regulation
To:
References
Download: ML11307A019 (3)

Text

SeabrookNPEm Resource From: Plasse, Richard Sent: Wednesday, July 27, 2011 1:44 PM To: 'richard.cliche@fpl.com'

Subject:

FW: August 3rd, 2011, Teleconference Topics of Discussion Attachments: Conference call topics of discussion.docx From: Kalikian, Roger Sent: Wednesday, July 27, 2011 10:39 AM To: Plasse, Richard Cc: Pham, Bo; Medoff, James; Ng, Ching; SeabrookNPEm Resource

Subject:

August 3rd, 2011, Teleconference Topics of Discussion Hi Richard, Attached please find the topics we would like to discuss with the applicant during the August 3rd teleconference.

Thanks, Roger Kalikian Division of License Renewal Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 301-415-5590 1

Hearing Identifier: Seabrook_License_Renewal_NonPublic Email Number: 2097 Mail Envelope Properties (8C658E9029C91D4D90C6960EF59FC0D632E494FABB)

Subject:

FW: August 3rd, 2011, Teleconference Topics of Discussion Sent Date: 7/27/2011 1:44:08 PM Received Date: 7/27/2011 1:44:00 PM From: Plasse, Richard Created By: Richard.Plasse@nrc.gov Recipients:

"'richard.cliche@fpl.com'" <richard.cliche@fpl.com>

Tracking Status: None Post Office: HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 529 7/27/2011 1:44:00 PM Conference call topics of discussion.docx 24898 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

August 3rd, 2011, Teleconference Topics of Discussion

References:

RAIs 3.1.1-60-1, 3.1.1-60-2, and RAI 4.3.3-2 dated January 5, 2011, and follow-up RAI 3.1.1-60-01/02 dated March 30, 2011.

In response to RAI 3.1.1-60-2, by letter dated February 3, 2011, on page 9 of 92, the applicant stated, The flux thimble tube no longer provides a function of pressure boundary hence, it has no license renewal function, and it will be removed from scope.

In response to follow-up RAI 3.1.1-60-01/02, by letter dated April 22, 2011, on page 6 of 43, the applicant stated, When the incore detector assembly is inserted, the thimble housing tube (outer tube) provides the RCS pressure boundary to keep the incore detector assembly internal volume dry. The letter further stated that, The thimble calibration tube (inner tube), although considered a RCS pressure boundary, is not in contact with reactor coolant. The staff would like to get clarification as to why the Flux Thimbles were removed from scope. This information is necessary to close out RAI 3.1.1-60-2.

RAI 4.3.3-2 If the flux thimbles are in scope, then the staff still needs to close out RAI 4.3.3-2, which noted that LRA Table 3.1.2-3 indicates that a TLAA is credited for the flux thimble tubes to manage cumulative fatigue damage. However, the LRA Section 4.3.3 did not provide information regarding the fatigue analysis for the flux thimble tubes to support this TLAA disposition.

Applicants response to this RAI referred back to the RAI response for 3.1.1-60-1, which deleted the flux thimble tubes from scope. Staff seeks clarification regarding the fatigue analysis to support the TLAA disposition of the flux thimble tubes or justify that a TLAA disposition is not applicable to the flux thimble tubes to close out RAI 4.3.3-2.

RAIs 3.1.1-60-1 and 3.1.1-60-01/02 Staff understands that the applicants current flux thimble tube design is unique, and currently there are two different designs. In order to close out RAIs 3.1.1-60-1 and 3.1.1-60-01/02, the staff would like to clarify, if the applicant has any recent plant specific or industry OE, which supports the assertion that the new designed flux thimble tubes do not need to be managed for wear.