ML14251A222

NRR E-mail Capture - Final RAIs for St. Lucie, Unit 1 Relief Request No. 8

ML14251A222
Person / Time
Site:	Saint Lucie
Issue date:	08/29/2014
From:	Farideh Saba Division of Operating Reactor Licensing
To:	Frehafer K Florida Power & Light Co
References
TAC MF4490
Download: ML14251A222 (2)

Text

NRR-PMDA-ECapture Resource From: Saba, Farideh Sent: Friday, August 29, 2014 2:55 PM To: ken.frehafer@fpl.com Cc: Lewis, Atanya (Atanya.Lewis@fpl.com); eric.katzman@fpl.com; Chereskin, Alexander

Subject:

Final RAis for St. Lucie Unit 1 Relief Request No. 8 (TAC No. MF4490)

Attachments: Final RAis St Lucie N-729 MF4490.docx Importance: High Ken ,

By letter dated July 24, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML14206A939), Florida Power and Light (the licensee) requested relief from the requirements of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI , associated with the examination frequency requirements of ASME Code Case N-729-1 at St Lucie, Unit 1. The licensee proposed an alternative examination requirement for the Reactor Vessel Top Head Penetration Nozzles as documented in Relief Request No 8.

To complete its review, the Nuclear Regulatory Commission (NRC) staff requests additional information .

Attached is the NRC staff request for additional information (RAI) for St. Lucie Unit 1 on Relief Request No. 8 (TAC MF4490) . A response to the RAI is requi red no later than September 26, 2014.

If you have any questions or concerns please let me know.

Thank you ,

Farideh E. Saba, P.E.

Senior Project Manager NRC/ADRO/NRR/ DORL 301-415-1447 Mail Stop 0 -8G9A Fa ri deh.Saba@NRC.GOV 1

REQUEST FOR ADDITIONAL INFORMATION RELIEF REQUEST NO. 81NSPECTION OF REACTOR VESSEL CLOSURE HEAD NOZZLES IN ACCORDANCE WITH ASME CODE CASE N-729-1 AS CONDITIONED BY 10CFR50.55a FLORIDA POWER AND LIGHT DOCKET NUMBER 50-335 (TAC NO. MF4490)

By letter dated July 24, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML14206A939), Florida Power and Light (the licensee) requested relief from the requirements of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, associated with the examination frequency requirements of Code Case N-729-1 at St Lucie , Unit 1. The licensee proposed an alternative examination requirement for the Reactor Vessel Top Head Penetration Nozzles as documented in Relief Request No 8. To complete its review, the Nuclear Regulatory Commission staff requests the following additional information .

RAI1 The licensee uses MRP-375, "Technical Basis for Reexamination Interval Extension for Alloy 690 PWR Reactor Vessel Top Head Penetration Nozzles," to provide a technical basis for the proposed alternative. In regards to MRP-375, Figures 3-1 , 3-3 and 3-5, provide a brief description of the materials tested for each plot that have data points above a hypothetical 6.2 factor of improvement line necessary to support the licensee's proposed alternative.

Provide any similarities between the items listed in (1) above and the associated nozzles and weld material used in the current reactor pressure vessel upper head at St Lucie Unit 1.