RS-08-015, Additional Information Supporting Second Ten-Year Interval Inservice Inspection Relief Request

Additional Information Supporting Second Ten-Year Interval Inservice Inspection Relief Request

ML080310561
Person / Time
Site:	Byron
Issue date:	01/31/2008
From:	Simpson P Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RS-08-015
Download: ML080310561 (3)

Text

Exelon Generation www.exeloncoTp.com Exelon 4300 Winfield Road Nuclear Warrenville, IL 60555 RS-08-015 January 31, 2008 U. S. Nuclear Regulatory Commission ATTN : Document Control Desk Washington, DC 20555-0001 Byron Station, Units 1 and 2 Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. STN 50-454 and STN 50-455 Subject : Additional Information Supporting Second Ten-Year Interval Inservice Inspection Relief Request References : 1 . Letter from D . M. Hoots (Exelon Generation Company, LLC) to U.S. NRC, "Inservice Inspection Program Second Interval Relief Requests 12R-21, 12R-22,12R-23,12R-25 and 12R-53," dated January 12, 2007

2. Letter from P. R. Simpson (Exelon Generation Company, LLC) to U. S. NRC, "Additional Information Supporting Second Ten-Year Interval Inservice Inspection Relief Requests," dated September 17, 2007 In Reference 1, Exelon Generation Company, LLC (EGC) submitted requests for relief from the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, "Rules for Inservice Inspection of Nuclear Power Plant Components," for the second inservice inspection (IS[) interval for Byron Station, Units 1 and 2. Additional information regarding the relief requests was submitted to the NRC in Reference 2.

in Reference 2, EGC stated in response to NRC Request 12R-21-3, related to seismic weld lugs, that :

"For the third ISI interval, Exelon Generation Company, LLC (EGC) intends to perform a best effort surface examination (i .e., liquid penetrant) on those portions of the lugs that are inspectable when the removable insulation panels are removed . In addition, in conjunction with this surface examination, EGC intends to perform a VT-1 visual examination of the upper surfaces of the three accessible lugs."

January 31, 2008 U. S . Nuclear Regulatory Commission Page 2 During a conference call with the NRC on January 11, 2008, the NRC requested EGC to make a regulatory commitment to perform these examinations during the third ISI interval . The attachment to this letter documents EGC's regulatory commitment.

Should you have any questions related to this letter, please contact Mr. Kenneth M . Nicely at (630) 657-2803 .

Respectfully, Patrick R. Sirnpson Manager - Licensing

Attachment:

Summary of Regulatory Commitments

ATTACHMENT Summary of Regulatory Commitments The following table identifies commitments made by Exelon Generation Company, LLC (EGC) in this document. Any other actions discussed in the submittal represent intended or planned actions. They are described to the NRC for the NRC's information and are not regulatory commitments.

COMMITTED COMMITMENT TYPE COMMITMENT DATE OR ONE-TIME ACTION PROGRAMMATIC "OUTAGE" (Yes/No) (Yes/No)

For the third inservice inspection (ISI) During the third Yes No interval, EGC will perform a best effort ISI interval, surface examination (i .e., liquid which ends penetrant) on those portions of the January 15, seismic weld lugs that are inspectable 2016 when the removable insulation panels are removed . In addition, in conjunction with this surface examination, EGC will perform a VT-1 visual examination of the upper surfaces of the three accessible lugs.