ML16194A230: Difference between revisions

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{{#Wiki_filter:200 Exelon Way Exelon Generation Kennett Square. PA 19348 www.exeloncorp.com 10 CFR 50.55a July 12, 2016 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-39 and DPR-85 NRC Docket Nos. 50-352 and 50-353  
{{#Wiki_filter:200 Exelon Way Kennett Square. PA 19348 Exelon Generation www.exeloncorp.com 10 CFR 50.55a July 12, 2016 U.S. Nuclear Regulatory Commission Attn : Document Control Desk Washington, DC 20555-0001 Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-39 and DPR-85 NRC Docket Nos. 50-352 and 50-353


==Subject:==
==Subject:==
Response to Request for Additional Information Regarding Proposed Relief Request 14R-10 for Limerick Generating Station, Units 1 and 2  
Response to Request for Additional Information Regarding Proposed Relief Request 14R-10 for Limerick Generating Station, Units 1 and 2


==References:==
==References:==
: 1) Letter from D. P. Helker (Exelon Generation Company, LLC) to the U.S. Nuclear Regulatory Commission, "Submittal of Relief Requests associated with the Fourth 10-Year Interval lnservice Inspection (ISi) Program," dated April 13, 2016(ML16104A122).
: 1) Letter from D. P. Helker (Exelon Generation Company, LLC) to the U.S.
: 2) E-mail correspondence from R. Ennis (U.S. Nuclear Regulatory Commission) to S. J. Hanson (Exelon Generation Company, LLC), "Draft Request for Additional Information Regarding Proposed Relief Request 14R-10 for Limerick Generating Station, Units 1 and 2 (ML16174A298)
Nuclear Regulatory Commission, "Submittal of Relief Requests associated with the Fourth 10-Year Interval lnservice Inspection (ISi)
," dated June 22, 2016. By letter dated April 13, 2016, Exelon Generation Company, LLC (Exelon) submitted relief requests associated with the Fourth 10-Year lnservice Inspection Interval for Limerick Generating Station (LGS), Units 1 and 2. Specifically , Exelon submitted requests 14R-01, 14R-02, 14R-05, 14R-06, 14R-07, 14R-08, 14R-09, 14R-10, 14R-11, 14R-12, and 14R-13. In the Reference 2 e-mail correspondence, the U.S. Nuclear Regulatory Commission (NRC) requested additional information relating to Relief Request 14R-10. The attached contains Exelon's response to the NRC request for additional information.
Program," dated April 13, 2016(ML16104A122).
: 2) E-mail correspondence from R. Ennis (U.S. Nuclear Regulatory Commission) to S. J. Hanson (Exelon Generation Company, LLC),
                  "Draft Request for Additional Information Regarding Proposed Relief Request 14R-10 for Limerick Generating Station, Units 1 and 2 (ML16174A298)," dated June 22, 2016.
By letter dated April 13, 2016, Exelon Generation Company, LLC (Exelon) submitted relief requests associated with the Fourth 10-Year lnservice Inspection Interval for Limerick Generating Station (LGS), Units 1 and 2. Specifically, Exelon submitted requests 14R-01, 14R-02, 14R-05, 14R-06, 14R-07, 14R-08, 14R-09, 14R-10, 14R-11, 14R-12, and 14R-13.
In the Reference 2 e-mail correspondence, the U.S. Nuclear Regulatory Commission (NRC) requested additional information relating to Relief Request 14R-10. The attached contains Exelon's response to the NRC request for additional information.
 
Response to Request for Additional Information Proposed Relief Request 14R-1 O July 12, 2016 Page 2 There are no regulatory commitments in this response.
Response to Request for Additional Information Proposed Relief Request 14R-1 O July 12, 2016 Page 2 There are no regulatory commitments in this response.
If you have any questions concerning this response, please contact Stephanie J. Hanson at 610-765-5143.
If you have any questions concerning this response, please contact Stephanie J. Hanson at 610-765-5143.
Respectfully, James Barstow Director, Licensing and Regulatory Affairs Exelon Generation Company, LLC  
Respectfully, James Barstow Director, Licensing and Regulatory Affairs Exelon Generation Company, LLC


==Attachment:==
==Attachment:==
Response to Draft Request for Additional Information Regarding Proposed Relief Request 14R-1 O for Limerick Generating Station, Units 1 and 2 cc:    USNRC Region I, Regional Administrator USNRC Senior Resident Inspector, LGS USNRC Project Manager, LGS R. R. Janati, Pennsylvania Bureau of Radiation Protection


Response to Draft Request for Additional Information Regarding Proposed Relief Request 14R-1 O for Limerick Generating Station, Units 1 and 2 cc: USNRC Region I, Regional Administrator USNRC Senior Resident Inspector, LGS USNRC Project Manager, LGS R. R. Janati, Pennsylvania Bureau of Radiation Protection ATTACHMENT Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos.
ATTACHMENT Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-39 and DPR-85 Docket Nos. 50-352 and 50-353 Response to Draft Request for Additional Information Regarding Proposed Relief Request Concerning 14R-10
DPR-39 and DPR-85 Docket Nos. 50-352 and 50-353 Response to Draft Request for Additional Information Regarding Proposed Relief Request Concerning 14R-10  
 
Response to Draft Request for Additional Information  Attachment Proposed Relief Request I4R-10  Page 1 of 3 Docket Nos. 50-352 and 50-353 By letter dated April 13, 2016, Exelon Generation Company, LLC (Exelon) submitted relief requests associated with the Fourth 10-Year Inservice Inspection Interval for Limerick Generating Station (LGS), Units 1 and 2. Specifically, Exelon submitted requests I4R-01, I4R-
 
02, I4R-05, I4R-06, I4R-07, I4R-08, I4R-09, I4R-10, I4R-11, I4R-12, and I4R-13.
The NRC staff has determined that additional information is needed to complete its review. On June 22, 2016, the NRC issued a draft request for additional information (RAI). This RAI supersedes a previous draft RAI sent to Exelon on June 14, 2016 (ML16166A086), regarding Relief Requests I4R-02 and I4R-10. Specifically, question EVIB-RAI-1 involving I4R-02 has been deleted since Exelon has identified that the requested information was previously docketed in a number of inservice inspection summary reports. 


Response to Draft Request for Additional Information                                  Attachment Proposed Relief Request I4R-10                                                        Page 1 of 3 Docket Nos. 50-352 and 50-353 By letter dated April 13, 2016, Exelon Generation Company, LLC (Exelon) submitted relief requests associated with the Fourth 10-Year Inservice Inspection Interval for Limerick Generating Station (LGS), Units 1 and 2. Specifically, Exelon submitted requests I4R-01, I4R-02, I4R-05, I4R-06, I4R-07, I4R-08, I4R-09, I4R-10, I4R-11, I4R-12, and I4R-13.
The NRC staff has determined that additional information is needed to complete its review. On June 22, 2016, the NRC issued a draft request for additional information (RAI). This RAI supersedes a previous draft RAI sent to Exelon on June 14, 2016 (ML16166A086), regarding Relief Requests I4R-02 and I4R-10. Specifically, question EVIB-RAI-1 involving I4R-02 has been deleted since Exelon has identified that the requested information was previously docketed in a number of inservice inspection summary reports.
The RAI is restated below along with Exelon's response.
The RAI is restated below along with Exelon's response.
EVIB-RAI-2:
EVIB-RAI-2:
 
Relief request I4R-10 proposes an alternative to the requirements of the ASME Code, Section XI, Table IWB-2500-1, concerning nozzle-to-vessel weld and nozzle inner radii examination requirements.
Relief request I4R-10 proposes an alternative to the requirements of the ASME Code, Section XI, Table IWB-2500-1, concerning nozzle-to-vessel weld and nozzle inner radii examination requirements.
: a. Please provide information related to the inspections that have already been performed on the components for which this alternative is requested. In addition, include all indications that were found and how these indications were dispositioned. If no indications were found during any inspections, please state so.
: a. Please provide information related to the inspections that have already been performed on the components for which this alternative is requested. In addition, include all indications that were found and how these indications were dispositioned. If no indications were found during any inspections, please state so.
: b. Please provide information regarding the extent of inspection coverage that was obtained to date for nozzle-to-vessel welds and nozzle inner radii at LGS, Units 1 and 2.
: b. Please provide information regarding the extent of inspection coverage that was obtained to date for nozzle-to-vessel welds and nozzle inner radii at LGS, Units 1 and 2.
Response:  The tables below provide information related to the inspections performed, inspection results, and extent of inspection coverage obtained during the third inspection interval for the nozzle-to-vessel welds and nozzle inside radius section exams covered by Relief Request I4R-10 at Limerick Generating Station, Units 1 and 2. 


Response to Draft Request for Additional Information Attachment Proposed Relief Request I4R-10   Page 2 of 3 Docket Nos. 50-352 and 50-353 Summary#ComponentIDDescriptionLastInspectedCoverageObtainedIndicationsComments600700N2ANozzletoVessel1R12(2008)76%NRInoindicationsfound600710N2AIRNozzleInnerRadius1R12(2008)100%NRInoindicationsfound600730N2BNozzletoVesselno3rdintervalinspection600740N2BIRNozzleInnerRadiusno3rdintervalinspection600760N2CNozzletoVessel1R15(2014)essentially100%NRInoindicationsfound600770N2CIRNozzleInnerRadius1R15(2014)100%NRInoindicationsfound600790N2DNozzletoVesselno3rdintervalinspection600800N2DIRNozzleInnerRadiusno3rdintervalinspection600820N2ENozzletoVesselno3rdintervalinspection600830N2EIRNozzleInnerRadiusno3rdintervalinspection600850N2FNozzletoVessel1R12(2008)76%NRInoindicationsfound600860N2FIRNozzleInnerRadius1R12(2008)100%NRInoindicationsfound600800N2GNozzletoVesselno3rdintervalinspection600890N2GIRNozzleInnerRadiusno3rdintervalinspection600910N2HNozzletoVesselno3rdintervalinspection600920N2HIRNozzleInnerRadiusno3rdintervalinspection600940N2JNozzletoVesselno3rdintervalinspection600950N2JIRNozzleInnerRadiusno3rdintervalinspection600970N2KNozzletoVesselno3rdintervalinspection600990N2KIRNozzleInnerRadiusno3rdintervalinspection601000N3ANozzletoVesselno3rdintervalinspection601010N3AIRNozzleInnerRadiusno3rdintervalinspection601030N3BNozzletoVesselno3rdintervalinspection601040N3BIRNozzleInnerRadiusno3rdintervalinspection601060N3CNozzletoVesselno3rdintervalinspection601070N3CIRNozzleInnerRadiusno3rdintervalinspection601090N3DNozzletoVessel1R12(2008)75.1%NRInoindicationsfound601100N3DIRNozzleInnerRadius1R12(2008)100%NRInoindicationsfound601300N5ANozzletoVessel1R12(2008)77.6%NRInoindicationsfound601310N5AIRNozzleInnerRadius1R12(2008)100%NRInoindicationsfound601330N5BNozzletoVessel1R12(2008)77.6%NRInoindicationsfound601340N5BIRNozzleInnerRadius1R12(2008)100%NRInoindicationsfound601360N6ANozzletoVesselno3rdintervalinspection601370N6AIRNozzleInnerRadiusno3rdintervalinspection601380N6BNozzletoVesselno3rdintervalinspection601390N6BIRNozzleInnerRadiusno3rdintervalinspection601400N7NozzletoVessel1R16(2016)essentially100%NRInoindicationsfound601410N7IRNozzleInnerRadius1R16(2016)100%NRInoindicationsfound601420N8ANozzletoVesselno3rdintervalinspection601420N8AIRNozzleInnerRadiusno3rdintervalinspection601440N8BNozzletoVessel1R15(2014)essentially100%NRInoindicationsfound601450N8BIRNozzleInnerRadius1R15(2014)100%NRInoindicationsfound601490N17ANozzletoVesselno3rdintervalinspection601500N17AIRNozzleInnerRadiusno3rdintervalinspection601520N17BNozzletoVessel1R12(2008)77.6%NRInoindicationsfound601530N17BIRNozzleInnerRadius1R12(2008)100%NRInoindicationsfound601550N17CNozzletoVesselno3rdintervalinspection501560N17CIRNozzleInnerRadiusno3rdintervalinspection601580N17DNozzletoVesselno3rdintervalinspection601590N17DIRNozzleInnerRadiusno3rdintervalinspectionLimerickGeneratingStationUnit1*NRInorecordableindications Response to Draft Request for Additional Information Attachment Proposed Relief Request I4R-10   Page 3 of 3 Docket Nos. 50-352 and 50-353 Summary#ComponentIDDescriptionLastInspectedCoverageObtainedIndicationsCommentsN2ANozzletoVessel2R10(2009)83.7%NRInoindicationsfoundN2AIRNozzleInnerRadius2R10(2009)100%NRInoindicationsfoundN2BNozzletoVessel2R12(2013)essentially100%NRInoindicationsfoundN2BIRNozzleInnerRadius2R12(2013)100%NRInoindicationsfoundN2CNozzletoVesselno3rdintervalinspectionN2CIRNozzleInnerRadiusno3rdintervalinspectionN2DNozzletoVessel2R10(2009)79.9%NRInoindicationsfoundN2DIRNozzleInnerRadius2R10(2009)100%NRInoindicationsfoundN2ENozzletoVesselno3rdintervalinspectionN2EIRNozzleInnerRadiusno3rdintervalinspectionN2FNozzletoVessel2R12(2013)essentially100%NRInoindicationsfoundN2FIRNozzleInnerRadius2R12(2013)100%NRInoindicationsfoundN2GNozzletoVesselno3rdintervalinspectionN2GIRNozzleInnerRadiusno3rdintervalinspectionN2HNozzletoVessel2R09(2007)80%NRInoindicationsfoundN2HIRNozzleInnerRadius2R09(2007)100%NRInoindicationsfoundN2JNozzletoVessel2R09(2007)80%NRInoindicationsfoundN2JIRNozzleInnerRadius2R09(2007)100%NRInoindicationsfoundN2KNozzletoVessel2R10(2009)80.3%NRInoindicationsfoundN2KIRNozzleInnerRadius2R10(2009)100%NRInoindicationsfoundN3ANozzletoVesselno3rdintervalinspectionN3AIRNozzleInnerRadiusno3rdintervalinspectionN3BNozzletoVessel2R11(2011)essentially100%NRInoindicationsfoundN3BIRNozzleInnerRadius2R11(2011)100%NRInoindicationsfoundN3CNozzletoVessel2R09(2007)82%NRInoindicationsfoundN3CIRNozzleInnerRadius2R09(2007)100%NRInoindicationsfoundN3DNozzletoVessel2R09(2007)82%NRInoindicationsfoundN3DIRNozzleInnerRadius2R09(2007)100%NRInoindicationsfoundN5ANozzletoVesselno3rdintervalinspectionN5AIRNozzleInnerRadiusno3rdintervalinspectionN5BNozzletoVessel2R09(2007)85%NRInoindicationsfoundN5BIRNozzleInnerRadius2R09(2007)100%NRInoindicationsfoundN6ANozzletoVesselno3rdintervalinspectionN6AIRNozzleInnerRadiusno3rdintervalinspectionN6BNozzletoVesselno3rdintervalinspectionN6BIRNozzleInnerRadiusno3rdintervalinspectionN7NozzletoVessel2R13(2015)essentially100%NRInoindicationsfound N7IRNozzleInnerRadius2R13(2015)100%NRInoindicationsfoundN8ANozzletoVessel2R10(2009)83.7%NRInoindicationsfoundN8AIRNozzleInnerRadius2R10(2009)100%NRInoindicationsfoundN8BNozzletoVessel2R10(2009)83.7%NRInoindicationsfoundN8BIRNozzleInnerRadius2R10(2009)100%NRInoindicationsfoundN17ANozzletoVesselno3rdintervalinspectionN17AIRNozzleInnerRadiusno3rdintervalinspectionN17BNozzletoVessel2R10(2009)81.8%NRInoindicationsfoundN17BIRNozzleInnerRadius2R10(2009)100%NRInoindicationsfoundN17CNozzletoVesselno3rdintervalinspectionN17CIRNozzleInnerRadiusno3rdintervalinspectionN17DNozzletoVessel2R09(2007)84%NRInoindicationsfoundN17DIRNozzleInnerRadius2R09(2007)100%NRInoindicationsfoundLimerickGeneratingStationUnit2*NRInorecordableindications}}
===Response===
The tables below provide information related to the inspections performed, inspection results, and extent of inspection coverage obtained during the third inspection interval for the nozzle-to-vessel welds and nozzle inside radius section exams covered by Relief Request I4R-10 at Limerick Generating Station, Units 1 and 2.
 
Response to Draft Request for Additional Information                                               Attachment Proposed Relief Request I4R-10                                                                     Page 2 of 3 Docket Nos. 50-352 and 50-353 Limerick Generating Station Unit 1 Summary # Component ID Description          Last Inspected Coverage Obtained Indications Comments 600700  N2A          Nozzle to Vessel      1R12 (2008)           76%           NRI    no indications found 600710  N2AIR      Nozzle Inner Radius 1R12 (2008)           100%           NRI    no indications found 600730  N2B          Nozzle to Vessel                                              no 3rd interval inspection 600740  N2BIR      Nozzle Inner Radius                                            no 3rd interval inspection 600760  N2C          Nozzle to Vessel      1R15 (2014)     essentially 100%   NRI    no indications found 600770  N2CIR      Nozzle Inner Radius 1R15 (2014)           100%           NRI    no indications found 600790  N2D          Nozzle to Vessel                                              no 3rd interval inspection 600800  N2DIR      Nozzle Inner Radius                                            no 3rd interval inspection 600820  N2E          Nozzle to Vessel                                              no 3rd interval inspection 600830  N2EIR      Nozzle Inner Radius                                            no 3rd interval inspection 600850  N2F          Nozzle to Vessel      1R12 (2008)           76%           NRI    no indications found 600860  N2FIR      Nozzle Inner Radius 1R12 (2008)           100%           NRI    no indications found 600800  N2G          Nozzle to Vessel                                              no 3rd interval inspection 600890  N2GIR      Nozzle Inner Radius                                            no 3rd interval inspection 600910  N2H          Nozzle to Vessel                                              no 3rd interval inspection 600920  N2HIR      Nozzle Inner Radius                                            no 3rd interval inspection 600940  N2J          Nozzle to Vessel                                              no 3rd interval inspection 600950  N2JIR      Nozzle Inner Radius                                            no 3rd interval inspection 600970  N2K          Nozzle to Vessel                                              no 3rd interval inspection 600990  N2KIR      Nozzle Inner Radius                                            no 3rd interval inspection 601000  N3A          Nozzle to Vessel                                              no 3rd interval inspection 601010  N3AIR      Nozzle Inner Radius                                            no 3rd interval inspection 601030  N3B          Nozzle to Vessel                                              no 3rd interval inspection 601040  N3BIR      Nozzle Inner Radius                                            no 3rd interval inspection 601060  N3C          Nozzle to Vessel                                              no 3rd interval inspection 601070  N3CIR      Nozzle Inner Radius                                            no 3rd interval inspection 601090  N3D          Nozzle to Vessel      1R12 (2008)         75.1%         NRI    no indications found 601100  N3DIR      Nozzle Inner Radius 1R12 (2008)           100%           NRI    no indications found 601300  N5A          Nozzle to Vessel      1R12 (2008)         77.6%         NRI    no indications found 601310  N5AIR      Nozzle Inner Radius 1R12 (2008)           100%           NRI    no indications found 601330  N5B          Nozzle to Vessel      1R12 (2008)         77.6%         NRI    no indications found 601340  N5BIR      Nozzle Inner Radius 1R12 (2008)           100%           NRI    no indications found 601360  N6A          Nozzle to Vessel                                              no 3rd interval inspection 601370  N6AIR      Nozzle Inner Radius                                            no 3rd interval inspection 601380  N6B          Nozzle to Vessel                                              no 3rd interval inspection 601390  N6BIR      Nozzle Inner Radius                                            no 3rd interval inspection 601400  N7          Nozzle to Vessel      1R16 (2016)     essentially 100%   NRI    no indications found 601410  N7IR        Nozzle Inner Radius 1R16 (2016)           100%           NRI    no indications found 601420  N8A          Nozzle to Vessel                                              no 3rd interval inspection 601420  N8AIR      Nozzle Inner Radius                                            no 3rd interval inspection 601440  N8B          Nozzle to Vessel      1R15 (2014)     essentially 100%   NRI    no indications found 601450  N8BIR      Nozzle Inner Radius 1R15 (2014)           100%           NRI    no indications found 601490  N17A        Nozzle to Vessel                                              no 3rd interval inspection 601500  N17AIR      Nozzle Inner Radius                                            no 3rd interval inspection 601520  N17B        Nozzle to Vessel      1R12 (2008)         77.6%         NRI    no indications found 601530  N17BIR      Nozzle Inner Radius 1R12 (2008)           100%           NRI    no indications found 601550  N17C        Nozzle to Vessel                                              no 3rd interval inspection 501560  N17CIR      Nozzle Inner Radius                                            no 3rd interval inspection 601580  N17D        Nozzle to Vessel                                              no 3rd interval inspection 601590  N17DIR      Nozzle Inner Radius                                            no 3rd interval inspection
                                                                                    *NRI  no recordable indications
 
Response to Draft Request for Additional Information                                               Attachment Proposed Relief Request I4R-10                                                                     Page 3 of 3 Docket Nos. 50-352 and 50-353 Limerick Generating Station Unit 2 Summary # Component ID Description          Last Inspected Coverage Obtained Indications Comments N2A          Nozzle to Vessel      2R10 (2009)         83.7%         NRI    no indications found N2AIR      Nozzle Inner Radius 2R10 (2009)           100%           NRI    no indications found N2B          Nozzle to Vessel      2R12 (2013)     essentially 100%   NRI    no indications found N2BIR      Nozzle Inner Radius 2R12 (2013)           100%           NRI    no indications found N2C          Nozzle to Vessel                                              no 3rd interval inspection N2CIR      Nozzle Inner Radius                                            no 3rd interval inspection N2D          Nozzle to Vessel      2R10 (2009)         79.9%         NRI    no indications found N2DIR      Nozzle Inner Radius 2R10 (2009)           100%           NRI    no indications found N2E          Nozzle to Vessel                                              no 3rd interval inspection N2EIR      Nozzle Inner Radius                                            no 3rd interval inspection N2F          Nozzle to Vessel      2R12 (2013)     essentially 100%   NRI    no indications found N2FIR      Nozzle Inner Radius 2R12 (2013)           100%           NRI    no indications found N2G          Nozzle to Vessel                                              no 3rd interval inspection N2GIR      Nozzle Inner Radius                                            no 3rd interval inspection N2H          Nozzle to Vessel      2R09 (2007)           80%           NRI    no indications found N2HIR      Nozzle Inner Radius 2R09 (2007)           100%           NRI    no indications found N2J          Nozzle to Vessel      2R09 (2007)           80%           NRI    no indications found N2JIR      Nozzle Inner Radius 2R09 (2007)           100%           NRI    no indications found N2K          Nozzle to Vessel      2R10 (2009)         80.3%         NRI    no indications found N2KIR      Nozzle Inner Radius 2R10 (2009)           100%           NRI    no indications found N3A          Nozzle to Vessel                                              no 3rd interval inspection N3AIR      Nozzle Inner Radius                                            no 3rd interval inspection N3B          Nozzle to Vessel      2R11 (2011)     essentially 100%   NRI    no indications found N3BIR      Nozzle Inner Radius 2R11 (2011)           100%           NRI    no indications found N3C          Nozzle to Vessel      2R09 (2007)           82%           NRI    no indications found N3CIR      Nozzle Inner Radius 2R09 (2007)           100%           NRI    no indications found N3D          Nozzle to Vessel      2R09 (2007)           82%           NRI    no indications found N3DIR      Nozzle Inner Radius 2R09 (2007)           100%           NRI    no indications found N5A          Nozzle to Vessel                                              no 3rd interval inspection N5AIR      Nozzle Inner Radius                                            no 3rd interval inspection N5B          Nozzle to Vessel      2R09 (2007)           85%           NRI    no indications found N5BIR      Nozzle Inner Radius 2R09 (2007)           100%           NRI    no indications found N6A          Nozzle to Vessel                                              no 3rd interval inspection N6AIR      Nozzle Inner Radius                                            no 3rd interval inspection N6B          Nozzle to Vessel                                              no 3rd interval inspection N6BIR      Nozzle Inner Radius                                            no 3rd interval inspection N7          Nozzle to Vessel      2R13 (2015)     essentially 100%   NRI    no indications found N7IR        Nozzle Inner Radius 2R13 (2015)           100%           NRI    no indications found N8A          Nozzle to Vessel      2R10 (2009)         83.7%         NRI    no indications found N8AIR      Nozzle Inner Radius 2R10 (2009)           100%           NRI    no indications found N8B          Nozzle to Vessel      2R10 (2009)         83.7%         NRI    no indications found N8BIR      Nozzle Inner Radius 2R10 (2009)           100%           NRI    no indications found N17A        Nozzle to Vessel                                              no 3rd interval inspection N17AIR      Nozzle Inner Radius                                            no 3rd interval inspection N17B        Nozzle to Vessel      2R10 (2009)         81.8%         NRI    no indications found N17BIR      Nozzle Inner Radius 2R10 (2009)           100%           NRI    no indications found N17C        Nozzle to Vessel                                              no 3rd interval inspection N17CIR      Nozzle Inner Radius                                            no 3rd interval inspection N17D        Nozzle to Vessel      2R09 (2007)           84%           NRI    no indications found N17DIR      Nozzle Inner Radius 2R09 (2007)           100%           NRI    no indications found
                                                                                    *NRI  no recordable indications}}

Latest revision as of 16:53, 30 October 2019

Response to Request for Additional Information Regarding Proposed Relief Request 14R-10
ML16194A230
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 07/12/2016
From: Jim Barstow
Exelon Generation Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
14R-10
Download: ML16194A230 (6)
v • d • e


Text

200 Exelon Way Kennett Square. PA 19348 Exelon Generation www.exeloncorp.com 10 CFR 50.55a July 12, 2016 U.S. Nuclear Regulatory Commission Attn : Document Control Desk Washington, DC 20555-0001 Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-39 and DPR-85 NRC Docket Nos. 50-352 and 50-353

Subject:

Response to Request for Additional Information Regarding Proposed Relief Request 14R-10 for Limerick Generating Station, Units 1 and 2

References:

1) Letter from D. P. Helker (Exelon Generation Company, LLC) to the U.S.

Nuclear Regulatory Commission, "Submittal of Relief Requests associated with the Fourth 10-Year Interval lnservice Inspection (ISi)

Program," dated April 13, 2016(ML16104A122).

2) E-mail correspondence from R. Ennis (U.S. Nuclear Regulatory Commission) to S. J. Hanson (Exelon Generation Company, LLC),

"Draft Request for Additional Information Regarding Proposed Relief Request 14R-10 for Limerick Generating Station, Units 1 and 2 (ML16174A298)," dated June 22, 2016.

By letter dated April 13, 2016, Exelon Generation Company, LLC (Exelon) submitted relief requests associated with the Fourth 10-Year lnservice Inspection Interval for Limerick Generating Station (LGS), Units 1 and 2. Specifically, Exelon submitted requests 14R-01, 14R-02, 14R-05, 14R-06, 14R-07, 14R-08, 14R-09, 14R-10, 14R-11, 14R-12, and 14R-13.

In the Reference 2 e-mail correspondence, the U.S. Nuclear Regulatory Commission (NRC) requested additional information relating to Relief Request 14R-10. The attached contains Exelon's response to the NRC request for additional information.

Response to Request for Additional Information Proposed Relief Request 14R-1 O July 12, 2016 Page 2 There are no regulatory commitments in this response.

If you have any questions concerning this response, please contact Stephanie J. Hanson at 610-765-5143.

Respectfully, James Barstow Director, Licensing and Regulatory Affairs Exelon Generation Company, LLC

Attachment:

Response to Draft Request for Additional Information Regarding Proposed Relief Request 14R-1 O for Limerick Generating Station, Units 1 and 2 cc: USNRC Region I, Regional Administrator USNRC Senior Resident Inspector, LGS USNRC Project Manager, LGS R. R. Janati, Pennsylvania Bureau of Radiation Protection

ATTACHMENT Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-39 and DPR-85 Docket Nos. 50-352 and 50-353 Response to Draft Request for Additional Information Regarding Proposed Relief Request Concerning 14R-10

Response to Draft Request for Additional Information Attachment Proposed Relief Request I4R-10 Page 1 of 3 Docket Nos. 50-352 and 50-353 By letter dated April 13, 2016, Exelon Generation Company, LLC (Exelon) submitted relief requests associated with the Fourth 10-Year Inservice Inspection Interval for Limerick Generating Station (LGS), Units 1 and 2. Specifically, Exelon submitted requests I4R-01, I4R-02, I4R-05, I4R-06, I4R-07, I4R-08, I4R-09, I4R-10, I4R-11, I4R-12, and I4R-13.

The NRC staff has determined that additional information is needed to complete its review. On June 22, 2016, the NRC issued a draft request for additional information (RAI). This RAI supersedes a previous draft RAI sent to Exelon on June 14, 2016 (ML16166A086), regarding Relief Requests I4R-02 and I4R-10. Specifically, question EVIB-RAI-1 involving I4R-02 has been deleted since Exelon has identified that the requested information was previously docketed in a number of inservice inspection summary reports.

The RAI is restated below along with Exelon's response.

EVIB-RAI-2:

Relief request I4R-10 proposes an alternative to the requirements of the ASME Code,Section XI, Table IWB-2500-1, concerning nozzle-to-vessel weld and nozzle inner radii examination requirements.

a. Please provide information related to the inspections that have already been performed on the components for which this alternative is requested. In addition, include all indications that were found and how these indications were dispositioned. If no indications were found during any inspections, please state so.
b. Please provide information regarding the extent of inspection coverage that was obtained to date for nozzle-to-vessel welds and nozzle inner radii at LGS, Units 1 and 2.

Response

The tables below provide information related to the inspections performed, inspection results, and extent of inspection coverage obtained during the third inspection interval for the nozzle-to-vessel welds and nozzle inside radius section exams covered by Relief Request I4R-10 at Limerick Generating Station, Units 1 and 2.

Response to Draft Request for Additional Information Attachment Proposed Relief Request I4R-10 Page 2 of 3 Docket Nos. 50-352 and 50-353 Limerick Generating Station Unit 1 Summary # Component ID Description Last Inspected Coverage Obtained Indications Comments 600700 N2A Nozzle to Vessel 1R12 (2008) 76% NRI no indications found 600710 N2AIR Nozzle Inner Radius 1R12 (2008) 100% NRI no indications found 600730 N2B Nozzle to Vessel no 3rd interval inspection 600740 N2BIR Nozzle Inner Radius no 3rd interval inspection 600760 N2C Nozzle to Vessel 1R15 (2014) essentially 100% NRI no indications found 600770 N2CIR Nozzle Inner Radius 1R15 (2014) 100% NRI no indications found 600790 N2D Nozzle to Vessel no 3rd interval inspection 600800 N2DIR Nozzle Inner Radius no 3rd interval inspection 600820 N2E Nozzle to Vessel no 3rd interval inspection 600830 N2EIR Nozzle Inner Radius no 3rd interval inspection 600850 N2F Nozzle to Vessel 1R12 (2008) 76% NRI no indications found 600860 N2FIR Nozzle Inner Radius 1R12 (2008) 100% NRI no indications found 600800 N2G Nozzle to Vessel no 3rd interval inspection 600890 N2GIR Nozzle Inner Radius no 3rd interval inspection 600910 N2H Nozzle to Vessel no 3rd interval inspection 600920 N2HIR Nozzle Inner Radius no 3rd interval inspection 600940 N2J Nozzle to Vessel no 3rd interval inspection 600950 N2JIR Nozzle Inner Radius no 3rd interval inspection 600970 N2K Nozzle to Vessel no 3rd interval inspection 600990 N2KIR Nozzle Inner Radius no 3rd interval inspection 601000 N3A Nozzle to Vessel no 3rd interval inspection 601010 N3AIR Nozzle Inner Radius no 3rd interval inspection 601030 N3B Nozzle to Vessel no 3rd interval inspection 601040 N3BIR Nozzle Inner Radius no 3rd interval inspection 601060 N3C Nozzle to Vessel no 3rd interval inspection 601070 N3CIR Nozzle Inner Radius no 3rd interval inspection 601090 N3D Nozzle to Vessel 1R12 (2008) 75.1% NRI no indications found 601100 N3DIR Nozzle Inner Radius 1R12 (2008) 100% NRI no indications found 601300 N5A Nozzle to Vessel 1R12 (2008) 77.6% NRI no indications found 601310 N5AIR Nozzle Inner Radius 1R12 (2008) 100% NRI no indications found 601330 N5B Nozzle to Vessel 1R12 (2008) 77.6% NRI no indications found 601340 N5BIR Nozzle Inner Radius 1R12 (2008) 100% NRI no indications found 601360 N6A Nozzle to Vessel no 3rd interval inspection 601370 N6AIR Nozzle Inner Radius no 3rd interval inspection 601380 N6B Nozzle to Vessel no 3rd interval inspection 601390 N6BIR Nozzle Inner Radius no 3rd interval inspection 601400 N7 Nozzle to Vessel 1R16 (2016) essentially 100% NRI no indications found 601410 N7IR Nozzle Inner Radius 1R16 (2016) 100% NRI no indications found 601420 N8A Nozzle to Vessel no 3rd interval inspection 601420 N8AIR Nozzle Inner Radius no 3rd interval inspection 601440 N8B Nozzle to Vessel 1R15 (2014) essentially 100% NRI no indications found 601450 N8BIR Nozzle Inner Radius 1R15 (2014) 100% NRI no indications found 601490 N17A Nozzle to Vessel no 3rd interval inspection 601500 N17AIR Nozzle Inner Radius no 3rd interval inspection 601520 N17B Nozzle to Vessel 1R12 (2008) 77.6% NRI no indications found 601530 N17BIR Nozzle Inner Radius 1R12 (2008) 100% NRI no indications found 601550 N17C Nozzle to Vessel no 3rd interval inspection 501560 N17CIR Nozzle Inner Radius no 3rd interval inspection 601580 N17D Nozzle to Vessel no 3rd interval inspection 601590 N17DIR Nozzle Inner Radius no 3rd interval inspection

  • NRI no recordable indications

Response to Draft Request for Additional Information Attachment Proposed Relief Request I4R-10 Page 3 of 3 Docket Nos. 50-352 and 50-353 Limerick Generating Station Unit 2 Summary # Component ID Description Last Inspected Coverage Obtained Indications Comments N2A Nozzle to Vessel 2R10 (2009) 83.7% NRI no indications found N2AIR Nozzle Inner Radius 2R10 (2009) 100% NRI no indications found N2B Nozzle to Vessel 2R12 (2013) essentially 100% NRI no indications found N2BIR Nozzle Inner Radius 2R12 (2013) 100% NRI no indications found N2C Nozzle to Vessel no 3rd interval inspection N2CIR Nozzle Inner Radius no 3rd interval inspection N2D Nozzle to Vessel 2R10 (2009) 79.9% NRI no indications found N2DIR Nozzle Inner Radius 2R10 (2009) 100% NRI no indications found N2E Nozzle to Vessel no 3rd interval inspection N2EIR Nozzle Inner Radius no 3rd interval inspection N2F Nozzle to Vessel 2R12 (2013) essentially 100% NRI no indications found N2FIR Nozzle Inner Radius 2R12 (2013) 100% NRI no indications found N2G Nozzle to Vessel no 3rd interval inspection N2GIR Nozzle Inner Radius no 3rd interval inspection N2H Nozzle to Vessel 2R09 (2007) 80% NRI no indications found N2HIR Nozzle Inner Radius 2R09 (2007) 100% NRI no indications found N2J Nozzle to Vessel 2R09 (2007) 80% NRI no indications found N2JIR Nozzle Inner Radius 2R09 (2007) 100% NRI no indications found N2K Nozzle to Vessel 2R10 (2009) 80.3% NRI no indications found N2KIR Nozzle Inner Radius 2R10 (2009) 100% NRI no indications found N3A Nozzle to Vessel no 3rd interval inspection N3AIR Nozzle Inner Radius no 3rd interval inspection N3B Nozzle to Vessel 2R11 (2011) essentially 100% NRI no indications found N3BIR Nozzle Inner Radius 2R11 (2011) 100% NRI no indications found N3C Nozzle to Vessel 2R09 (2007) 82% NRI no indications found N3CIR Nozzle Inner Radius 2R09 (2007) 100% NRI no indications found N3D Nozzle to Vessel 2R09 (2007) 82% NRI no indications found N3DIR Nozzle Inner Radius 2R09 (2007) 100% NRI no indications found N5A Nozzle to Vessel no 3rd interval inspection N5AIR Nozzle Inner Radius no 3rd interval inspection N5B Nozzle to Vessel 2R09 (2007) 85% NRI no indications found N5BIR Nozzle Inner Radius 2R09 (2007) 100% NRI no indications found N6A Nozzle to Vessel no 3rd interval inspection N6AIR Nozzle Inner Radius no 3rd interval inspection N6B Nozzle to Vessel no 3rd interval inspection N6BIR Nozzle Inner Radius no 3rd interval inspection N7 Nozzle to Vessel 2R13 (2015) essentially 100% NRI no indications found N7IR Nozzle Inner Radius 2R13 (2015) 100% NRI no indications found N8A Nozzle to Vessel 2R10 (2009) 83.7% NRI no indications found N8AIR Nozzle Inner Radius 2R10 (2009) 100% NRI no indications found N8B Nozzle to Vessel 2R10 (2009) 83.7% NRI no indications found N8BIR Nozzle Inner Radius 2R10 (2009) 100% NRI no indications found N17A Nozzle to Vessel no 3rd interval inspection N17AIR Nozzle Inner Radius no 3rd interval inspection N17B Nozzle to Vessel 2R10 (2009) 81.8% NRI no indications found N17BIR Nozzle Inner Radius 2R10 (2009) 100% NRI no indications found N17C Nozzle to Vessel no 3rd interval inspection N17CIR Nozzle Inner Radius no 3rd interval inspection N17D Nozzle to Vessel 2R09 (2007) 84% NRI no indications found N17DIR Nozzle Inner Radius 2R09 (2007) 100% NRI no indications found

  • NRI no recordable indications
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