ML15028A007

2015/01/27 NRR E-mail Capture - St. Lucie Plant, Unit 2 Request for Additional Information (RAI) Regarding the Spring 2014 Steam Generator Tube Inspections (TAC No. MF4847)

ML15028A007
Person / Time
Site:	Saint Lucie
Issue date:	01/27/2015
From:	Saba F E Plant Licensing Branch II
To:	Frehafer K W Florida Power & Light Co
References
TAC MF4847
Download: ML15028A007 (3)

Text

1NRR-PMDAPEm ResourceFrom:Saba, FaridehSent:Tuesday, January 27, 2015 11:56 AMTo:ken.frehafer@fpl.com; Lewis, Atanya (Atanya.Lewis@fpl.com)Cc:eric.katzman@fpl.com; Johnson, AndrewSubject:ST. LUCIE PLANT, UNIT 2 - Request for Additional Information (RAI) REGARDING THE SPRING 2014 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MF4847)Importance:HighKen and Atanya, By letter dated September 18, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14279A237), Florida Power & Light Company (the licensee) submitted information summarizing the results of the Spring 2014 steam generator tube inspections performed at St. Lucie, Unit 2. These inspections were performed during refueling outage 21. The U.S. Nuclear Regulatory Commission (NRC) staff summarized a conference call held with the licensee in a letter dated August 8, 2014 (ADAMS Accession No. ML14189A090).

The NRC staff has reviewed the information the licensee provided and determined that the following additional information is needed in order to complete the review. As we agreed during our conference call on Monday, January 26, 2015, please respond to these RAIs by March 26, 2015.

RAI-1 Clarify whether the U-bends of rows 1 and 2 were inspected with the bobbin probe.

RAI-2 Discuss the results of the Plug Visual Inspections. Were all plugs confirmed to be present and free of degradation?

RAI-3 Discuss the results of the Supplemental Primary Side Inspections to address Westinghouse NSAL 12-01. Was any degradation of the channel head cladding detected? RAI-4 Discuss the results of the following Secondary Side Inspection and cleaning activities: a. Upper Bundle Flush b. Sludge Lance c. Foreign object search and retrieval d. Upper internals visual inspection RAI-5 Summarize the number of tubes and the number of indications associated with the tube support structures (anti-vibration bars, tube support plates, V-shaped pads, apex of anti-vibration bars).

RAI-6 One tube was plugged since it had wear associated with a neighboring tube's V-shaped support pad. Has this phenomenon been observed in the past? Are the V-shaped support pads in close proximity to the neighboring tubes? Would this occurrence be expected given the design (rigidity) of the anti-vibration bar support structure and the spacing between the tubes?

RAI-7 One tube was plugged since the length of the indication associated with the antivibration bar was shorter than most anti-vibration bar wear indications. Discuss any insights on this occurrence. Thanks,

Farideh 2Farideh E. Saba, P.E. Senior Project Manager NRC/ADRO/NRR/DORL 301-415-1447 Mail Stop O-8G9A Farideh.Saba@NRC.GOV Hearing Identifier: NRR_PMDA Email Number: 1831 Mail Envelope Properties (Farideh.Saba@nrc.gov20150127115600)

Subject:

ST. LUCIE PLANT, UNIT 2 - Request for Additional Information (RAI) REGARDING THE SPRING 2014 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MF4847) Sent Date: 1/27/2015 11:56:12 AM Received Date: 1/27/2015 11:56:00 AM From: Saba, Farideh Created By: Farideh.Saba@nrc.gov Recipients: "eric.katzman@fpl.com" <eric.katzman@fpl.com> Tracking Status: None "Johnson, Andrew" <Andrew.Johnson@nrc.gov> Tracking Status: None "ken.frehafer@fpl.com" <ken.frehafer@fpl.com>

Tracking Status: None "Lewis, Atanya (Atanya.Lewis@fpl.com)" <Atanya.Lewis@fpl.com> Tracking Status: None

Post Office: Files Size Date & Time MESSAGE 2531 1/27/2015 11:56:00 AM Options Priority: High Return Notification: No Reply Requested: Yes Sensitivity: Normal Expiration Date: Recipients Received: