ML102090133
| ML102090133 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 07/27/2010 |
| From: | David Helker Exelon Generation Co, Exelon Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML102090133 (10) | |
Text
www.exeloncorp.com Exelon Nuclear 10 CFR 50.55a July 27, 2010 U.S.Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Limerick Generating Station, Units 1 and 2 Facility Operating License Nos.NPF-39 and NPF-85 NRC Docket Nos.50-352 and 50-353
Subject:
Response to Request for Additional Information
-Submittal of Relief Request 13R-14 Concerning Nozzle-to-Vessel Weld and Inner Radii Examinations
References:
1)Letter from P.B.Cowan (Exelon Generation Company, LLC)to U.S.Nuclear Regulatory Commission, IIS u bmittal of Relief Request 13R-14 Concerning Nozzle-to-Vessel Weld and Inner Radii Examinations,lI date February 1, 2010 2)Letter from P.Bamford (U.S.Nuclear Regulatory Commission) to M.J.Pacilio (Exelon Nuclear), IlLimerick Generating Station, Units 1 and2-Request for Additional Information Regarding Relief Request14, Nozzle-to-Vessel Weld and Inner Radii Examinations (TAC NOS.ME3306 and ME3307),1I dated June 25, 2010 In the Reference 1 letter, Exelon Generation Company, LLC (EGC), requested relief from the American Society of Mechanical Engineers (ASME)Boiler and Pressure Vessel (B&PV)Code,Section XI, IIRules for Inservice Inspection of Nuclear Power Plant Components.
II Relief Request 13R-14 proposes an alternative to the requirements contained in Table IWB-2500-1 concerning nozzle-to-vessel weld and nozzle inner radii examination requirements.
In the Reference 2 letter, the U.S.Nuclear Regulatory Commission requested additional information.
Attached is our response.
Response to Request for Additional InformationSubmittal of Relief Request 13R-14 Concerning Nozzle-to-Vessel Weld and Inner Radii Examinations July 27,2010 Page 2 No regulatory commitments are contained in this letter.Should you have any questions concerning this letter, please contact Tom Loomis at (610)5510.Sincerely, David P.Helker Manager-Licensing&Regulatory Affairs Exelon Generation Company, LLC
Attachment:
Response to Request for Additional Information
-Relief Request 13R-14 cc: USNRC Region I, Regional Administrator USNRC Senior Resident Inspector, LGS USNRC Project Manager, LGSR.R.Janati, PA Bureau of Radiation Protection Attachment Response to Request for Additional Information Relief Request 13R-14 Response to Request for Additional Information Relief Request 13R-14 Request: Attachment Page 1 1.Please expand the synopsis of what inspections have already been performed on the components for which this alternative is requested to include all indications thatwerefound and how these indications were dispositioned.
If no indications were found during any inspections, please state so.Response: The following tables identify the Recordable Indications (RI)and Non-Recordable Indications (NRI)identified during the inspections.
All the indications were evaluated as acceptable per ASME Section XI.Table1-Unit 1 Nozzle-to-Vessel and Nozzle Inner Radius Ins ection Results 1 N17A 1R04 1 2 NRI 1 N17A 1R0721 NRI 1 N17A-IR 1R0412 NRI 1 N17A-IR 1R0721 NRI 1 N17B 1R0412 RI Recordable indications identified-acceptable per ASME Section XI 1 N17B 1R07 2 1 NRI 1 N17B 1R12 3 1 NRI 1 N17B-IR 1R04 1 2 NRI 1 N17B-IR 1R0721 NRI 1 N17B-IR 1 R12 3 1 NRI 1 1R0412 RI Recordable indications identified-acceptable per ASME Section XI 1 N17C 1 R11 2 3 NRI 1 N17C-IR 1R0412 NRI 1 N17C-IR 1 R11 2 3 NRI 1 N17D 1R0412 RI Recordable indications identified-acceptable per ASME Section XI 1 N17D 1R0721 NRI 1 N17D-IR 1R04 1 2 NRI 1 N17D-IR 1R07 2 1 NRI 1 N2A 1R02 1 1 NRI 1 N2A 1R07 2 1 NRI 1 N2A 1 R12 3 1 NRI 1 N2A-IR 1R0211 NRI 1 N2A-IR 1R07 2 1 NRI 1 N2A-IR 1 R12 3 1 NRI 1 N2B 1R0211 RI Recordable indications identified-acceptable per ASME Section XI 1 N2B 1R0922 RI Recordable indications identified-acceptable per ASME Section XI 1 N2B-IR 1R02 1 1 NRI Response to Request for Additional Information Relief Request 13R*14 Attachment Page 2Recordableindications identified-acceptable per ASME Section XI N2C 1R09 2 2 RI Recordableindicationsidentified-acceptable per ASME Section XI 1R0211 NRI 1R09 2 2 NRI 1R02 1 1 RI Recordable indications identified-acceptable per ASME Section XI 1R07 2 1 NRI 1R02 1 1 NRI 1R07 2 1 NRI 1 1R0211 RI Recordableindicationsidentified-acceptable per ASME Section XI 1 N2E 1R09 2 2 NRI 1 N2E-IR 1R0211 NRI 1 N2E-IR 1R09 2 2 NRI 1 N2F 1R0211 RI Recordable indications identified-acceptable per ASME Section XI 1 N2F 1R0721 NRI 1 N2F 1 R12 3 1 NRI 1 N2F-IR 1R0211 NRI 1 N2F-IR 1R0721 NRI 1 N2F-IR 1R12 3 1 NRI 1 N2G 1R0211 RI Recordable indications identified-acceptable per ASME Section XI 1 N2G 1R0721 NRI 1 N2G 1 R11 2 3 NRI 1 N2G-IR 1R0211 NRI 1 N2G-IR 1R0721 NRI 1 N2G-IR 1 R11 2 3 NRI 1 N2H 1R02 1 1 RI Recordable indications identified-acceptable per ASME Section XI 1 N2H 1R0721 NRI 1 N2H 1 R11 2 3 NRI 1 N2H-IR 1R0211 NRI 1 N2H-IR 1R0721 NRI 1 N2H-IR 1 R11 2 3 NRI 1 N2J 1R02 1 1 RI Recordable indications identified-acceptable per ASME Section XI 1 N2J 1 R10 2 3 NRI 1 N2J-IR 1R02 1 1 NRI 1 N2J-IR 1R10 2 3 NRI Response to Request for Additional Information Relief Request 13R-14 Attachment Page 3 N2K 1R02 1 1 RI Recordable indications identified-acceptable per ASME Section XI 1 N2K 1 R1023 NRI 1 N2K-IR 1R0211 NRI 1 N2K-IR 1R10 2 3 NRI 1 N3A 1R06 1 3 NRI 1 N3A 1R0922 RI Recordable indications identified-acceptable per ASME Section XI 1 N3A-IR 1R06 1 3 NRI N3A-IR 1R0922 NRI 1 N3B 1R0613 NRt 1 N3B 1R09 2 2 NRt 1 N3B-tR 1R06 1 3 NRt 1 N3B-tR 1R09 2 2 NRI 1 N3C 1R06 1 3 NRt 1 N3C R07 2 1 NRt 1 N3C-tR 1R0613 NRt 1 N3C-tR 1R07 2 1 NRt 1 N3D 1R06 1 3 NRI 1 N3D 1R07 2 1 NRt 1 N3D 1 R12 3 1 NRt 1 N3D-IR 1R06 1 3 NRI 1 N3D-IR 1R07 2 1 NRt 1 N3D-tR 1R12 3 1 NRt 1 N5A 1R0412 NRt 1 N5A 1R07 2 1 NRI 1 N5A 1R12 3 1 NRt 1 N5A-tR 1R0412 NRt 1 N5A-tR 1R07 2 1 NRI 1 N5A-tR 1R12 3 1 NRI 1 N5B 1R0412 RI Recordable indications identified-acceptable per ASME Section XI 1 N5B 1R0721 NRI 1 N5B 1 R12 3 1 NRt 1 N5B-tR 1R04 1 2 NRt 1 N5B-IR 1R0721 NRt 1 N5B-IR 1 R12 3 1 NRI 1 N6A 1R0513 NRt 1 N6A 1 R10 2 3 NRI 1 N6A-IR 1R0513 NRt 1 N6A-IR 1R10 2 3 NRt 1 N6B 1R0412 NRI 1 N6B 1 R1023 NRt 1 N6B-IR 1R0412 NRI Response to Request for Additional Information Relief Request 13R-14 Attachment Page 4 N7-IR N8A N8A N8A-IR N8A-IR N8B N8B N8B-IR N8B-IR 1R05 1R10 1R04 1R07 1R04 1R07 1R04 1R07 1R04 1R07 2 2 2 2 1 2 2 3 3 3 2 2 2 2 1 NRI NRI Rl NRI NRI NRI NRI NRI NRI NRI NRI Recordable indications acceptable per ASME Section XI Table2-Unit 2 Nozzle-to-Vessel and Nozzle Inner Radius Ins 2 N17A 2R0312 RI Recordable indications identified-acce table er ASME Section XI 2 N17A 2R08 2 2 NRI 2 N17A-IR 2R03 1 2 NRI 2 N17A-IR 2R0822 NRI 2 N17B 2R04 1 3 NRI 2 N17B 2R1031 NRI 2 N17B-IR 2R04 1 3 NRI 2 N17B-IR 2R1031 NRI 2 N17C 2R02 1 1 NRI 2 N17C 2R07 2 1 NRI 2 N17C-IR 2R02 1 1 NRI 2 N17C-IR 2R0721 NRI 2 N17D 2R04 1 3 NRI 2 N17D 2R09 3 1 NRI 2 N17D-IR 2R04 1 3 NRI 2 N17D-IR 2R09 3 1 NRI 2 N2A 2R0211 RI Recordableindicationsidentified-acce table er ASME Section XI 2 N2A 2R1031 NRI 2 N2A-IR 2R02 1 1 NRI 2 N2A-IR 2R1031 NRI 2 N2B 2R0211 RI Recordable indications identified-acce table er ASME Section XI 2 N2B 2R0721 NRI 2 N2B-IR 2R02 1 1 NRI Response to Request for Additional Information Relief Request 13R-14 Attachment PageS Recordable indications identified-acce table er ASME Section XI 2 N2C 2R07 2 RI Recordable indications identified-acce table er ASME Section XI 2 N2C-IR 2A02 1 1 NRI 2 N2C-IR 2R07 2 1 NRI 2 N2D 2A0211 RI Recordable indications identified-acceptable per ASME Section XI 2 N2D 2R1031 NRI 2 N2D-IA 2A02 1 1 NAI 2 N2D-IR 2R1031 NRI 2 N2E 2R02 1 1 RI Recordable indications identified-acce table er ASME Section XI 2 N2E 2R07 2 1 NRI 2 N2E-IR 2R0211 NRI 2 N2E-IR 2R07 2 1 NRI 2 N2F 2R02 1 1 RI Recordable indications identified-acce table er ASME Section XI 2 N2F 2R07 2 1 NRI 2 N2F-IR 2A0211 NRI 2 N2F-IR 2A07 2 1 NRI 2 N2G 2A02 1 1 AI Recordable indications identified-acce table er ASME Section XI 2 N2G 2A07 2 1 NRI 2 N2G-IR 2R02 1 1 NRI 2 N2G-IR 2A07 2 1 NRI 2 N2H 2R02 1 1 RI Recordable indications identified-acce table er ASME Section XI N2H 2R0931 NRI R 2R02 1 1 NRI N2H-IR 2R09 3 1 NRI N2J 2R02 1 1 RI Recordable indications identified-acce table er ASME Section XI 2 N2J 2R0931 NRI 2 N2J-IR 2R0211 NAI 2 N2J-IR 2A09 3 1 NRI 2 N2K 2A02 1 1 NRI 2 N2K 2R1031 NRI 2 N2K-IR 2R02 1 1 NRI 2 N2K-IR 2R1031 NRI2N3A 2R0312 NRI 2 N3A 2R07 2 1 NRI 2 N3A-IR 2R03 1 2 NRI 2 N3A-IA 2R07 2 1 NRI Response to Request for Additional Information Relief Request 13R-14 Attachment Page 6 ecordable indications identified-table er ASME Section XI 2 N3B 2R07 2 1 RI Recordable indications identified-acce table er ASME Section XI 2 N3B-IR 2R03 1 2 NRI 2 N3B-IR 2R07 2 1 NRI 2 N3C 2R04 1 3 NRI 2 N3C 2R09 3 1 NRI 2 N3C-IR 2R04 1 3 NRI 2 N3C-IR 2R0931 NRI 2 N3D 2R04 1 3 NRI 2 N3D 2R09 3 1 NRI 2 N3D-IR 2R04 1 3 NRI 2 N3D-IR 2R09 3 1 NRI 2 N5A 2R0312 RI Recordable indications identified-acce table er ASME Section XI 2 N5A 2R0822 NRI 2 N5A-IR 2R03 1 2 NRI 2 N5A-IR 2R08 2 2 NRI 2 N5B 2R03 1 2 RI Recordable indications identified-acce table er ASME Section XI2N5B 2R0931 NRI 2 N5B-IR 2R03 1 2 NRI 2 N5B-IR 2R09 3 1 NRI 2 N6A 2R05 1 3 NRI 2 N6A 2R08 2 2 NRI 2 N6A-IR 2R05 1 3 NRI 2 N6A-IR 2R0822 NRI 2 N6B 2R03 1 2 NRI2N6B 2R08 2 2 NRI 2 N6B-IR 2R03 1 2 NRI 2 N6B-IR 2R0822 NRI 2 N7 2R05 1 3 NRI 2 N7 2R0822 NRI 2 N7-IR 2R05 1 3 NRI 2 N7-IR 2R08 2 2 NRI 2 N8A 2R03 1 2 NRI 2 N8A 2R10 3 1 NRI 2 N8A-IR 2R03 1 2 NRI 2 N8A-IR 2R10 3 1 NRI 2 N8B 2R03 1 2 NRI 2 N8B 2R1031 NRI 2 N8B-IR 2R0312 NRI 2 N8B-IR 2R1031 NRI Response to Request for Additional Information Relief Request 13R-14 Request: Attachment Page 7 2.Please confirm that the single set of values (e.g., nozzle radii, nozzle thicknesses, etc.)used in Enclosure 2 to 13R-14,"Plant Specific Applicability," are correct and applicable to both LGS Units 1 and 2.The staff notes that some of these values would be expected to be unit, or nozzle-specific.
Response: The single set of values (e.g., nozzle radii, nozzle thicknesses, etc.)used in Enclosure 2 to14,"Plant Specific Applicability," are correct and applicable to both LGS, Units 1 and 2.These values are minimum design values.