Letter Sequence RAI |
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TAC:ME3589, Clarify Application of Setpoint Methodology for LSSS Functions (Approved, Closed) TAC:ME3590, Clarify Application of Setpoint Methodology for LSSS Functions (Approved, Closed) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance, Acceptance
- Supplement, Supplement, Supplement
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MONTHYEARML1008503912010-03-18018 March 2010 GE-Hitachi Nuclear Energy Americas, LLC Affidavit Requesting That GEH Proprietary Report, NEDC-33484P Be Withheld from Public Disclosure Project stage: Request ML1008503922010-03-19019 March 2010 Application for Withholding Proprietary Information from Public Disclosure Project stage: Request RS-10-002, Request for License Amendment Re Measurement Uncertainty Recapture Power Uprate2010-03-25025 March 2010 Request for License Amendment Re Measurement Uncertainty Recapture Power Uprate Project stage: Request ML1008504032010-03-31031 March 2010 NEDO-33484, Rev. 0, Safety Analysis Report for Limerick Generating Station Units 1 & 2 Thermal Power Optimization Project stage: Request ML1010310792010-04-19019 April 2010 Supplemental Information Needed for Acceptance of Requested Licensing Action Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Acceptance Review RS-10-085, Supplement to License Amendment Request for Measurement Uncertainty Recapture Power Uprate2010-04-26026 April 2010 Supplement to License Amendment Request for Measurement Uncertainty Recapture Power Uprate Project stage: Supplement ML1012409982010-05-0606 May 2010 Acceptance of Requested Licensing Action Measurement Uncertainty Recapture Power Uprate Request and Standby Liquid Control System Modification Project stage: Acceptance Review ML1013303752010-05-24024 May 2010 Electronic Transmission, Draft Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Draft RAI ML1014700892010-06-0303 June 2010 Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: RAI ML1015802912010-06-0707 June 2010 Electronic Transmission, Draft Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Draft RAI ML1015906292010-06-15015 June 2010 Request for Withholding Information from Public Disclosure Project stage: Withholding Request Acceptance ML1016804402010-06-21021 June 2010 Electronic Transmission, Draft Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Draft RAI ML1015803382010-06-25025 June 2010 Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: RAI ML1016901212010-07-0202 July 2010 Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: RAI ML1018800202010-07-0808 July 2010 Electronic Transmission, Draft Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Draft RAI ML1019400532010-07-15015 July 2010 Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: RAI ML1018700242010-07-15015 July 2010 Electronic Transmission, Draft Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Draft RAI ML1018700082010-07-15015 July 2010 Request for Additional Information Regarding Measurement Uncertainty Recapture Power Uprate Project stage: RAI RS-10-116, Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate2010-07-22022 July 2010 Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Request RS-10-127, Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate2010-07-28028 July 2010 Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Request RS-10-129, Schedule for Responding to Request for Additional Information2010-07-28028 July 2010 Schedule for Responding to Request for Additional Information Project stage: Request RS-10-126, Additional Information and Supplement Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate2010-08-10010 August 2010 Additional Information and Supplement Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Supplement RS-10-132, Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate2010-08-12012 August 2010 Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Request RS-10-133, Limerick, Units 1 and 2 - Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate2010-08-12012 August 2010 Limerick, Units 1 and 2 - Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Request RS-10-144, Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate2010-08-30030 August 2010 Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Request ML1024402642010-08-31031 August 2010 0000-0114-0580-RO-NP, Rev. 0, Limerick Generating Station, Units 1 & 2, Upper Shelf Energy Evaluation for LPCI Nozzle Forging Material Project stage: Request ML1028005382010-10-19019 October 2010 Request for Withholding Information from Public Disclosure Project stage: Withholding Request Acceptance RS-10-212, Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate2010-12-17017 December 2010 Additional Information Supporting Request for License Amendment Regarding Measurement Uncertainty Recapture Power Uprate Project stage: Request RS-11-003, Supplement to License Amendment Request for Measurement Uncertainty Recapture Power Uprate2011-01-0707 January 2011 Supplement to License Amendment Request for Measurement Uncertainty Recapture Power Uprate Project stage: Supplement ML1100606332011-01-18018 January 2011 Request for Withholding Information from Public Disclosure Project stage: Withholding Request Acceptance ML1106910952011-04-0808 April 2011 Issuance of Amendments 201 & 163 Measurement Uncertainty Recapture Power Uprate and Standby Liquid Control System Changes Project stage: Approval ML1110400892011-04-20020 April 2011 Correction Letter for Limerick Generating Station, Units 1 and 2 - Safety Evaluation Regarding Measurement Uncertainty Recapture Power Uprate and Standby Liquid Control System Changes Project stage: Approval 2010-06-03
[Table View] |
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Category:Letter
MONTHYEARIR 05000352/20243012024-02-0202 February 2024 Initial Operator Licensing Examination Report 05000352/2024301 and 05000353/2024301 IR 05000352/20230042024-01-31031 January 2024 Integrated Inspection Report 05000352/2023004 and 05000353/2023004 IR 05000352/20240112024-01-31031 January 2024 Information Request to Support Post-Approval Site Inspection for License Renewal; Inspection Report 05000352/2024011 ML24026A2962024-01-26026 January 2024 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System (PPS)- Syrs, . ML24004A0342024-01-17017 January 2024 Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0026 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting)) IR 05000352/20230102024-01-11011 January 2024 Age-Related Degradation Report 05000352/2023010 and 05000353/2023010 IR 05000352/20234012023-12-21021 December 2023 Cybersecurity Inspection Report 05000352/2023401 and 05000353/2023401 ML23321A2362023-12-14014 December 2023 Issuance of Amendment Nos. 262 and 224 Adoption of TSTF-477, Revision 3 and Associated Technical Specification Changes ML23278A1292023-12-14014 December 2023 Units 1 & 2; Limerick, Units 1 & 2; Nine Mile Point, Units 1 & 2; and Peach Bottom, Units 2 & 3 -Revision to Approved Alternatives to Use Boiling Water Reactor Vessel and Internals Project Guidelines ML23333A2182023-11-29029 November 2023 Operator Licensing Examination Approval ML23325A2062023-11-21021 November 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System ML23313A0432023-11-13013 November 2023 Summary of Regulatory Audit in Support of Amendment Request for Control Room Air Conditioning Technical Specifications ML23317A1192023-11-10010 November 2023 Constellation Energy Generation, LLC - 2023 Annual Report - Guarantees of Payment of Deferred Premiums IR 05000352/20230032023-10-27027 October 2023 Integrated Inspection Report 05000352/2023003 and 05000353/2023003 and Independent Spent Fuel Storage Installation Inspection 07200065/2023001 ML23297A1722023-10-24024 October 2023 Request for Information for a Biennial Problem Identification and Resolution Inspection; Inspection Report 05000352/2024010 and 05000353/2024010 IR 05000352/20235012023-10-17017 October 2023 Emergency Preparedness Biennial Exercise Inspection Report 05000352/2023501 and 05000353/2023501 RS-23-097, Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans2023-10-12012 October 2023 Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans ML23279A0612023-10-0505 October 2023 Paragon Energy Solutions LLC, Part 21 Final Report Re Potential Defect with Eaton Jd and Hjd Series Molded Case Circuit Breakers (Mccbs) ML23276A5162023-10-0303 October 2023 Federal Emergency Management Agency Level 1 Finding from 2023 Evaluated Emergency Preparedness Exercise ML23275A1082023-09-29029 September 2023 FEMA Level 1 Findings Limerick NPP- Boyertown/Colebrookdale ML23241A9452023-09-27027 September 2023 Generation Station, Units 1 and 2 Regulatory Audit Plan Supporting Review of the Equipment Qualification Portion of Limerick Digital Instrumentation and Controls License Amendment Request ML23269A0522023-09-26026 September 2023 Request for Information and Notification of Conduct of IP 71111.21.N.04, Age-Related Degradation, Reference Inspection Report 05000352/2023010 and 05000353/2023010 ML23255A0952023-09-12012 September 2023 Resubmittal of License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System (PPS) to Address ML23254A0242023-09-0606 September 2023 Paragon Energy Solutions LLC, Potential Defect with Eaton Jd and Hjd Series Molded Case Circuit Breakers (Mccbs) ML23249A1002023-09-0606 September 2023 Requalification Program Inspection IR 05000352/20230052023-08-31031 August 2023 Updated Inspection Plan for Limerick Generating Station, Units 1 and 2 (Report 05000352/2023005 and 05000353/2023005) ML23248A2082023-08-31031 August 2023 UFSAR Cover Page ML23242A2172023-08-30030 August 2023 Response to Request for Additional Information for Application to Adopt TSTF-477, Revision 3, Add Action for Two Inoperable Control Room AC Subsystems and Associated Technical Specification Changes NMP2L2851, Relief Request Associated with Successive Inspections for Generic Letter 88-01 / BWRVIP-75-A Augmented Examinations2023-08-25025 August 2023 Relief Request Associated with Successive Inspections for Generic Letter 88-01 / BWRVIP-75-A Augmented Examinations ML23228A0942023-08-16016 August 2023 Response to Request for Additional Information for Supplemental License Amendment Request to Revise Technical Specifications and Exemption Request from Requirements of 10CFR50.62 ATWS Rule to Support the . IR 05000352/20230022023-08-14014 August 2023 Integrated Inspection Report 05000352/2023002 and 05000353/2023002 ML23220A0182023-08-0808 August 2023 Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection 05000352/2023401 and 05000353/2023401 RS-23-087, Revision to Approved Alternatives Associated with the Use of the BWRVIP Guidelines in Lieu of Specific ASME Code Requirements on Reactor2023-08-0404 August 2023 Revision to Approved Alternatives Associated with the Use of the BWRVIP Guidelines in Lieu of Specific ASME Code Requirements on Reactor ML23212B2362023-07-31031 July 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System - WEC Documents ML23212B1052023-07-31031 July 2023 Supplement to License Amendment Request to Revise Technical Specifications and Exemption Request from Requirements of 10CFR50.62 ATWS Rule to Support the Digital Modernization Project Installation - Revise ML23202A2192023-07-21021 July 2023 Response to Request for Additional Information for Supplemental License Amendment Request to Revise Technical Specifications and Exemption Request from Requirements of 10CFR50.62 ATWS Rule to Support the . ML23193B0122023-07-20020 July 2023 Audit Plan in Support of Review of License Amendment Request and Exemption Request for Digital Instrumentation and Controls Installation Support (Epids L-2023-LLA-0025 and L-2023-LLE-0005) ML23187A0962023-07-19019 July 2023 Generation Station, Unit Nos. 1 and 2 - Revised Estimated Review Completion Date Concerning License Amendment Request to Replace Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System ML23208A1522023-07-0606 July 2023 PEMA Letter Dated 7-6-23 Re Limerick Exercise 9-26-23 ML23177A2242023-06-26026 June 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection . ML23145A1972023-06-23023 June 2023 Correction to the Renewed Facility Operating License Pages in Amendment Nos. 255, 256, 257, 258, 259, and 260 2024-02-02
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML23276B4642023-10-0303 October 2023 NRR E-mail Capture - NRC Request for Additional Information Limerick TSTF-477 LAR ML23269A0522023-09-26026 September 2023 Request for Information and Notification of Conduct of IP 71111.21.N.04, Age-Related Degradation, Reference Inspection Report 05000352/2023010 and 05000353/2023010 ML23208A1942023-07-27027 July 2023 NRR E-mail Capture - Limerick Generating Station - Audit Plan for TSTF-477 LAR Review (L-2022-LLA-0174) ML23202A0682023-07-21021 July 2023 NRR E-mail Capture - NRC Request for Additional Information Re. TSTF-477 LAR ML23201A1262023-07-18018 July 2023 Additional RAIs for Limerick Generation Station, Units 1 and 2 - LAR and Exemption Request for Digital I&C Installation Support ML23173A0632023-06-20020 June 2023 RAIs for Limerick Generation Station, Units 1 and 2 - LAR and Exemption Request for Digital I&C Installation Support ML22320A1132022-11-21021 November 2022 Generation Station, Units 1 and 2 - Supplemental Information Needed for Acceptance of Digital Instrumentation and Controls License Amendment Requests ML22172A0752022-06-17017 June 2022 Response: Review and Feedback on Draft Limerick Digital License Amendment Request (L-2020-LRM-0041) ML22136A0032022-05-13013 May 2022 NRR E-mail Capture - NRC Request for Additional Information - Limerick License Amendment Request (L-2021-LLA-0042) ML22124A2862022-05-0404 May 2022 Information Needed to Provide Substantive Feedback on Human Factors Engineering Supporting the Planned Limerick Digital I&C License Amendment Request ML22103A2542022-04-19019 April 2022 Draft Request for Additional Information ML22089A1172022-03-30030 March 2022 Additional Comments and Questions on Constellation'S March 31st Presentation ML22045A4822022-02-14014 February 2022 Notification of Conduct of a Fire Protection Team Inspection ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21117A0342021-05-0505 May 2021 Request for Additional Information Regarding Proposed Alternative to Use ASME Code Case N-893 ML21062A0652021-03-0101 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21049A2572021-02-18018 February 2021 Request for Additional Information Byron/Dresden Proposed Changes to Site Emergency Plans to Support Post-Shutdown and Permanently Defueled Conditions (EPID-2020-LLA-0240 & EPID-2020-LLA-0237) ML21048A3402021-02-11011 February 2021 Request for Information for Relief Request I4R-24 Associated with Residual Heat Removal Heat Exchanger Category C-A and C-B Examinations ML21015A1852021-01-15015 January 2021 Temporary Instruction 2515/194 Inspection Documentation Request ML20239A7982020-08-25025 August 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet License Amendment Request to Adopt TSTF-568, Revision 2 ML20156A2992020-06-0404 June 2020 RAI for RR to Use Inservice Testing Program Safety Relief Valve Testing ML20153A7042020-06-0101 June 2020 NRR E-mail Capture - Preliminary RAI for Fleet Request to Use Alternative OMN-26 ML20149K7012020-05-28028 May 2020 Request for Additional Information for License Amendment Request to Use Inservice Testing Program Safety Relief Valve Testing ML20098C4342020-04-0606 April 2020 Draft Request for Additional Information - Limerick Generating Station, Unit 1 - Emergency LAR to Increase Allowable MSIV Leakage ML19344A0332019-12-10010 December 2019 Request for Additional Information License Amendment Request to Adopt TSTF-505, Revision 2 Risk Informed Completion Times Exelon Generation Company Limerick Generating Station, Units 1 and 2 Docket Nos. 50-352 and 50-353 ML19344A0242019-12-0909 December 2019 Request for Additional Information (RAI) - Limerick Units 1 and 2: TSTF-505, Use of Risk Informed Completion Times (Ricts) for Actions to Be Taken When Limiting Conditions for Operation (Lcos) Are Not Met ML19275H1362019-10-0202 October 2019 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Request to Use ASME Code Case N-879 ML19179A0612019-07-19019 July 2019 Three Mile Point 1 - Supplemental Information Needed to Proposed Alternative to Use ASME Code Case N-879 ML19192A0312019-07-10010 July 2019 NRR E-mail Capture - LIMERICK-REQUEST for Additional Information: Risk Informed Completion Times TSTF-505, Revison 2, Provide RISK-INFORMED Completion Times - RITSTF Initiative 4B ML19168A0882019-06-17017 June 2019 Letter to R. W. Libra Alternative Request Pertaining to Dry Shielded Canisters Equipped with Boral Neutron Absorber Plates - Supplemental Information Needed (W/Enclosursi) ML18276A0202018-10-0202 October 2018 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Amendment Request to Revise Emergency Plan for Limerick and Peach Bottom ML18081B0682018-03-26026 March 2018 Second Round RAI for Limerick, 10 CFR 50.69 ML18067A1482018-03-0808 March 2018 Enclosurequest for Additional Information (Letter to P. R. Simpson Request for Additional Information Regarding Exelon Generating Company, Llc'S Decommissioning Funding Plan Update for Independent Spent Fuel Storage Installation) ML17354A0182017-12-19019 December 2017 E-mail Request for Information (Rai): Relief Request I3R-23 Regarding Limited Examination Coverage ML18040A9212017-11-0707 November 2017 Attachment - Limerick Generating Station, Units 1 and 2, Request for Additional Information Application to Revise TSs to Adopt TSTF-542, Revision 2 ML17207A0772017-07-31031 July 2017 Supplemental Information Needed for Acceptance of Requested Licensing Action Adoption of Title 10 of the Code of Federal Regulations Section 50.69 ML17137A1652017-05-16016 May 2017 Request for Additional Information for Relief Request Associated with Reactor Pressure Vessel Nozzle Repairs ML17062A4912017-03-0303 March 2017 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Fleet Alternative to RPV Threads in Flange Examination (CAC Nos. MF8712-MF8729) ML17018A1932016-12-0909 December 2016 NRR E-mail Capture - (External_Sender) Limerick Flood MSA Question ML16221A6712016-08-0808 August 2016 Draft Request for Additional Information ML16221A6122016-08-0808 August 2016 Draft Request for Additional Information ML16174A2982016-06-22022 June 2016 Draft Request for Additional Information ML16166A0862016-06-14014 June 2016 Draft Request for Additional Information ML16085A0252016-03-24024 March 2016 Draft Request for Additional Information ML15202A3782015-07-21021 July 2015 Draft Request for Additional Information ML14324A8102014-11-18018 November 2014 Emails from ACE and NRC Response Re Limerick Higher Radiation Readings on Nov 18, 2014 ML14210A5762014-07-29029 July 2014 Draft Request for Additional Information (Tac Nos. MF3198 and MF3199) 2023-09-26
[Table view] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 15, 2010 Mr. Michael J. Pacilio President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
LIMERICK GENERATING STATION, UNIT NOS. 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME3589 AND ME3590)
Dear Mr. Pacilio:
By letter dated March 25, 2010 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML100850380), Exelon Generation Company, LLC (Exelon) submitted a license amendment request (LAR) proposing to revise the operating license and technical specifications for Limerick Generating Station (LGS), Units 1 and 2. This LAR proposes to implement an increase of approximately 1.65% in rated thermal power from the currently licensed thermal power limit of 3458 megawatts thermal.
The Nuclear Regulatory Commission staff has been reviewing the response and has determined that additional information is needed to complete its review. The specific questions are found in the enclosed request for additional information (RAI). The questions were sent via electronic transmission on June 30, 2010, to Mr. Kevin Borton, of your staff. The draft questions were sent to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. The draft questions were discussed in teleconference with your staff on July 2,2010, and July 14, 2010. It was agreed that a response to this RAI would be submitted by August 16, 2010. If a response is not received by that date, the request will be subject to denial, pursuant to Title 10 of the Code of Federal Regulations, Section 2.108, "Denial of application for failure to supply information."
Please contact me at 301-415-2833, if you have any questions.
(J;:~
Peter Bamford, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353
Enclosure:
As stated cc w/encl: Distribution via Listserv
REQUEST FOR ADDITIONAL INFORMATION LIMERICK GENERATING STATION, UNITS 1 AND 2 MEASUREMENT UNCERTAINTY RECAPTURE (MUR)
POWER UPRATE REQUEST DOCKET NOS. 50-352 AND 50-353 By letter dated March 25, 2010 (Agencywide Documents Access and Manqgement System (ADAMS) Accession No. ML100850380), Exelon Generation Company, LLC (Exelon, the licensee) submitted a license amendment request (LAR) proposing to revise the operating license and technical specifications (TSs) for Limerick Generating Station (LGS), Units 1 and .2.
This LAR proposes to implement an increase of approximately 1.65% in rated thermal power from the currently licensed thermal power limit of 3458 megawatts thermal. The increase would be based on the improved thermal power measurement accuracy, which would be achieved through the utilization of the Cameron International (formerly Caldon) CheckPlus' leading edge flowmeter (LEFM) ultrasonic flow measurement instrumentation. The application also proposes a modification to the standby liquid control system (SLCS). The Nuclear Regulatory Commission (NRC) staff has been reviewing the submittal and has determined that additional information is needed to complete its review.
- 1. The LAR, Attachment 6, Section 3.2.1, "Fracture Toughness," requires additional information. Appendix G to Title 10 of the Code of Federal Regulations (10 CFR),
Part 50, "Fracture Toughness Requirements," states that reactor vessel (RV) beltline materials must maintain upper-shelf energy (USE) throughout the life of the RV of no less than 50 foot-pounds (ft-Ibs) unless it is demonstrated in a manner approved by the Director, Office of Nuclear Reactor Regulation, that lower values of Charpy USE will provide margins of safety against fracture equivalent to those required by Appendix G of Section XI of the American Society of Mechanical Engineers (AS ME) Code. The submittal states that the minimum USE for LGS, Unit 1 is 24 ft-lbs at 32 effective full-power years (EFPY) for low-pressure coolant injection (LPCI) nozzle forging Q2Q35W, and is 25 ft-Ibs for LGS, Unit 2 at 32 EFPY for LPCI nozzle forging Q2Q33W, and therefore "Equivalent Margin Analyses (EMAs) were performed for the limiting RV beltline plate, weld and nozzle forging materials." The licensee states that NEDO-32205-A, Rev. 1, "10 CFR 50 Appendix G Equivalent Margin Analysis for Low Upper Shelf Energy in [Boiling Water Reactor] BWRl2 through BWRl6 Vessels," was used with a bounding peak f1uence of 1.9 x 1018 n/crn" [neutrons per square centimeter] to evaluate the vessel against the requirements of 10 CFR Part 50, Appendix G. In NEDO-32205-A, Rev. 1, the materials addressed in the analysis included: SA302 Grade B and Grade B Modified low allow steel plate, SA533 Grade B Class 1 low alloy steel plate, Shielded Metal Arc Welds, Electroslag Welds, Submerged Arc Welds (SAW) made with non-Linde 80 flux, and SAW with Linde 80 flux. The nozzle materials were not included in the NEDO-32205-A, Rev. 1 analysis.
Therefore, the staff does not find the application of NEDO-32205-A, Rev. 1 acceptable for demonstrating compliance with Appendix G to 10 CFR Part 50 for LGS, Units 1 and 2 nozzle materials. The methodology contained in I\lEDO-32205-A, Rev. 1, is Enclosure
-2 applicable only to the materials analyzed in the report. For all RV beltline materials with USE values below 50 ft-lbs at 32 EFPY, the licensee must submit analyses to demonstrate that the lower values of Charpy USE will provide margins of safety against fracture equivalent to those required by Appendix G of Section XI of the ASME Code.
- 2. The current thermal licensed power (CTLP) pressure-temperature (P-T) curves, contained in "Pressure-Temperature Curves for [Philadelphia Electric Company] PECO Energy Company Limerick 1 (GE-NE-B11-00836-00-01, Rev. 0)," and "Pressure Temperature Curves for PECO Energy Company Limerick 2 (GE-NE-B11-00836-00-02, Rev. 0)," did not include analysis of the water level instrumentation nozzles within the RV beltline region. Provide a technical basis to support the statement in Attachment 6, Section 3.2.1, "Fracture Toughness," that the water level instrumentation nozzle that occurs within the RV beltline region is bounded by the CTLP P-T curves.
- 3. Initial property values for RV beltline materials are not consistent with the values previously submitted in response to Generic Letter 92-01, Rev. 1, "Reactor Vessel Structural Integrity," and P-T curve submittals for LGS, Units 1 and 2 in GE-NE-B11 00836-00-01 and GE-NE-B11-00836-00-02, respectively. Provide a comprehensive listing of the RV beltline materials, including the heat number for each RV beltline plate or forging and the heat number of wire and flux lot number used to fabricate each RV beltline weld; the chemical composition, in particular the weight in percent of copper and nickel for each RV beltline material; and the unirradiated reference temperature for each RV beltline material, and the method of determining the unirradiated reference temperature from the Charpy and drop weight tests.
July 15, 2010 Mr. Michael J. Pacilio President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
LIMERICK GENERATING STATION, UNIT NOS. 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME3589 AND ME3590)
Dear Mr. Pacilio:
By letter dated March 25, 2010 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML100850380), Exelon Generation Company, LLC (Exelon) submitted a license amendment request (LAR) proposing to revise the operating license and technical specifications for Limerick Generating Station (LGS), Units 1 and 2. This LAR proposes to implement an increase of approximately 1.65% in rated thermal power from the currently licensed thermal power limit of 3458 megawatts thermal.
The Nuclear Regulatory Commission staff has been reviewing the response and has determined that additional information is needed to complete its review. The specific questions are found in the enclosed request for additional information (RAI). The questions were sent via electronic transmission on June 30, 2010, to Mr. Kevin Borton, of your staff. The draft questions were sent to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. The draft questions were discussed in teleconference with your staff on July 2, 2010, and July 14, 2010. It was agreed that a response to this RAI would be submitted by August 16, 2010. If a response is not received by that date, the request will be subject to denial, pursuant to Title 10 of the Code of Federal Regulations, Section 2.108, "Denial of application for failure to supply information."
Please contact me at 301-415-2833, if you have any questions.
Sincerely, Ira!
Peter Bamford, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353
Enclosure:
As stated cc w/encl: Distribution via Listserv DISTRIBUTION:
PUBLIC RidsOgcRp Resource LPLI-2 RtF RidsAcrsAcnw_MailCTR Resource RidsNrrDciCvib Resource CFairbanks, NRR RidsRgn1 MailCenter Resource RidsNrrDorlDpr Resource RidsNrrDorlLpl1-2 Resource RidsNrrPMLimerick Resource RidsNrrLAABaxter Resource TAlexion, NRR ADAMS Accession Number: ML101940053
- concurrence via email ** concurrence via memo OFFICE LPLI-21PM LPLI-21LA CVIB1BC LPL1*21BC NAME PBamford SUttle for ABaxter
- MMitchell** HChernoff DATE 07/1512010 07/1512010 07/0212010 711512010 OFFICIAL RECORD COpy