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| =Text= | | =Text= |
| {{#Wiki_filter:July 8, 2010 MEMORANDUM TO: Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation | | {{#Wiki_filter:July 8, 2010 MEMORANDUM TO: Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Peter Bamford, Project Manager /ra/ |
| | | Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation |
| FROM: Peter Bamford, Project Manager /ra/ Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation | |
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| ==SUBJECT:== | | ==SUBJECT:== |
| LIMERICK GENERATING STATION, UNITS 1 AND 2 - ELECTRONIC TRANSMISSION, DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME3589 AND ME3590) | | LIMERICK GENERATING STATION, UNITS 1 AND 2 - ELECTRONIC TRANSMISSION, DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME3589 AND ME3590) |
| The attached draft request for additional information (RAI) was transmitted by electronic transmission on June 30, 2010, to Mr. Kevin Borton, at Exelon Generation Company, LLC (Exelon). This draft RAI was transmitted to facilitate the technical review being conducted by the Nuclear Regulatory Commission (NRC) staff and to support a conference call (if needed) with Exelon in order to clarify the licensee's submittal. The draft RAI is related to Exelon's submittal dated March 25, 2010, regarding Limerick Generating Station, Units 1 and 2, Measurement Uncertainty Recapture Power Uprate. The draft questions were sent to ensure that they were understandable, the regulatory basis was clear, and to determine if the information was previously docketed. Additionally, review of the draft RAI would allow Exelon to evaluate and agree upon a schedule to respond to the RAI. This memorandum and the attachment do not represent an NRC staff position. | | The attached draft request for additional information (RAI) was transmitted by electronic transmission on June 30, 2010, to Mr. Kevin Borton, at Exelon Generation Company, LLC (Exelon). This draft RAI was transmitted to facilitate the technical review being conducted by the Nuclear Regulatory Commission (NRC) staff and to support a conference call (if needed) with Exelon in order to clarify the licensees submittal. The draft RAI is related to Exelons submittal dated March 25, 2010, regarding Limerick Generating Station, Units 1 and 2, Measurement Uncertainty Recapture Power Uprate. The draft questions were sent to ensure that they were understandable, the regulatory basis was clear, and to determine if the information was previously docketed. Additionally, review of the draft RAI would allow Exelon to evaluate and agree upon a schedule to respond to the RAI. This memorandum and the attachment do not represent an NRC staff position. |
| Docket Nos. 50-352 and 50-353 | | Docket Nos. 50-352 and 50-353 |
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| ==Enclosure:== | | ==Enclosure:== |
| As stated July 8, 2010 MEMORANDUM TO: Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation | | As stated |
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| FROM: Peter Bamford, Project Manager /ra/ Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation | | July 8, 2010 MEMORANDUM TO: Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Peter Bamford, Project Manager /ra/ |
| | Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation |
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| |
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| ==SUBJECT:== | | ==SUBJECT:== |
| LIMERICK GENERATING STATION, UNITS 1 AND 2 - ELECTRONIC TRANSMISSION, DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME3589 AND ME3590) | | LIMERICK GENERATING STATION, UNITS 1 AND 2 - ELECTRONIC TRANSMISSION, DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME3589 AND ME3590) |
| The attached draft request for additional information (RAI) was transmitted by electronic transmission on July 6, 2010, to Mr. Kevin Borton, at Exelon Generation Company, LLC (Exelon). This draft RAI was transmitted to facilitate the technical review being conducted by the Nuclear Regulatory Commission (NRC) staff and to support a conference call (if needed) with Exelon in order to clarify the licensee's submittal. The draft RAI is related to Exelon's submittal dated March 25, 2010, regarding Limerick Generating Station, Units 1 and 2, Measurement Uncertainty Recapture Power Uprate. The draft questions were sent to ensure that they were understandable, the regulatory basis was clear, and to determine if the information was previously docketed. Additionally, review of the draft RAI would allow Exelon to evaluate and agree upon a schedule to respond to the RAI. This memorandum and the attachment do not represent an NRC staff position. | | The attached draft request for additional information (RAI) was transmitted by electronic transmission on July 6, 2010, to Mr. Kevin Borton, at Exelon Generation Company, LLC (Exelon). This draft RAI was transmitted to facilitate the technical review being conducted by the Nuclear Regulatory Commission (NRC) staff and to support a conference call (if needed) with Exelon in order to clarify the licensees submittal. The draft RAI is related to Exelons submittal dated March 25, 2010, regarding Limerick Generating Station, Units 1 and 2, Measurement Uncertainty Recapture Power Uprate. The draft questions were sent to ensure that they were understandable, the regulatory basis was clear, and to determine if the information was previously docketed. Additionally, review of the draft RAI would allow Exelon to evaluate and agree upon a schedule to respond to the RAI. This memorandum and the attachment do not represent an NRC staff position. |
| Docket Nos. 50-352 and 50-353 | | Docket Nos. 50-352 and 50-353 |
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| ==Enclosure:== | | ==Enclosure:== |
| As stated DISTRIBUTION | | As stated DISTRIBUTION: |
| : Public RidsNrrPMLimerick LPL1-2 R/F Accession No.: ML101880020
| | Public RidsNrrPMLimerick LPL1-2 R/F Accession No.: ML101880020 |
| * via memo OFFICE LPL1-2/PMCVIB/BC NAME PBamfordMMitchell* DATE 7/8/10 07/02/2010 OFFICIAL RECORD COPY DRAFT Enclosure REQUEST FOR ADDITIONAL INFORMATION LIMERICK GENERATING STATION, UNITS 1 AND 2 MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE REQUEST DOCKET NOS. 50-352 AND 50-353 By letter dated March 25, 2010 (Agencywide Documents Access and Management 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 TM 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. | | * via memo OFFICE LPL1-2/PM CVIB/BC NAME PBamford MMitchell* |
| : 1. The LAR, Attachment 6, Section 3.2.1, "Fracture Toughness," requires additional information. Appendix G to 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 ft-lbs 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 (ASME) 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-lbs 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 BWR/2 through BWR/6 Vessels," was used with a bounding peak fluence of 1.9 x 10 18 n/cm 2 (E > 1.0 MeV) 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 NEDO-32205-A, Rev. 1, is applicable only to the materials DRAFT 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. | | DATE 7/8/10 07/02/2010 OFFICIAL RECORD COPY |
| : 2. The current thermal licensed power (CTLP) pressure-temperature (P-T) curves, contained in "Pressure-Temperature Curves for 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.}} | | DRAFT REQUEST FOR ADDITIONAL INFORMATION LIMERICK GENERATING STATION, UNITS 1 AND 2 MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE REQUEST DOCKET NOS. 50-352 AND 50-353 By letter dated March 25, 2010 (Agencywide Documents Access and Management 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) CheckPlusTM 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 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 ft-lbs 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 (ASME) 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-lbs 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 BWR/2 through BWR/6 Vessels, was used with a bounding peak fluence of 1.9 x 1018 n/cm2 (E > 1.0 MeV) 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 NEDO-32205-A, Rev. 1, is applicable only to the materials Enclosure |
| | |
| | DRAFT 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 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.}} |
Letter Sequence Draft RAI |
|---|
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
|
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:Memoranda
MONTHYEARML22308A2392022-11-0808 November 2022
Documentation of Approval for Longer Review Period for Limerick Digital Instrumentation and Control License Amendment Requests Acceptance Review
ML22034A3932022-02-16016 February 2022
Calendar Year 2021 Security Baseline Completion Memo
ML21277A2472021-11-0505 November 2021
Notification of Significant Licensing Action - Proposed Issuance of Order Approving the Transfer of Licenses for Which a Hearing Has Been Requested - Exelon Generation Company, LLC; Et. Al
ML18138A3442018-05-22022 May 2018
2018 Limerick Summary of Public Meeting and Attendance List
ML17142A2382017-05-25025 May 2017
OEDO-17-00280 - Briefing Package for Drop-In Visit on June 9, 2017, by Senior Management of Exelon Generation Company, LLC with Chairman Svinicki, Commissioner Baran, and Commissioner Burns
ML17037B8502017-02-0606 February 2017
08/21/1975 Notice of Meeting with Architect Engineers of Mark II Owners to Discuss Load Combinations and Analytical Techniques for Determining Stresses in Mechanical Components and Structures of Mark II Containments
ML16344A2192016-12-12012 December 2016
Safety Evaluation for Limerick, Units 1 and 2, Proposed License Amendment to Revise the Technical Specifications to Address the High-Pressure Coolant Injection Operability Requirement Under Low Reactor Pressure Conditions
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
ML16088A2052016-03-28028 March 2016
Enclosure 1 - (72.30 DFP Reviews to Be Completed 2015) - Memo T Bowers from s Ruffin, Technial Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations
ML16088A2042016-03-28028 March 2016
Memo T Bowers from s Ruffin, Technical Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations W/ Encl 2 (Template)
ML16085A0252016-03-24024 March 2016
Draft Request for Additional Information
ML16075A3292016-03-16016 March 2016
OEDO-16-00165 - Briefing Package for Drop-In Visit on March 23, 2016, by Senior Management of Exelon Generation Company, LLC with the NRC Executive Director for Operations
ML15202A3782015-07-21021 July 2015
Draft Request for Additional Information
ML15028A4502015-01-27027 January 2015
LG-15-014 Verification of Readiness for Supplemental Inspection at Limerick Generating Station
ML15035A1122015-01-10010 January 2015
LTR-15-0061 Lewis Cuthbert, President, Alliance for a Clean Environment, ACE, Letter Lessons Learned from Fukushima Related to Limerick Nuclear Plant
ML14267A0762014-09-23023 September 2014
Acknowledgement Letter: B. Shank and C. Shank Regarding Limerick Nuclear Power Plant
ML14247A6482014-09-10010 September 2014
Supplemental Safety Evaluation Report
ML14190A9442014-08-11011 August 2014
Forwarding of Supplement 1 to the Safety Evaluation Report Related to the License Renewal of Limerick Generating Station, Units 1 and 2, Docket Numbers 50-352 and 50-353, to the Advisory Committee on Reactor Safeguards
ML14210A5762014-07-29029 July 2014
Draft Request for Additional Information (Tac Nos. MF3198 and MF3199)
ML14202A5182014-07-21021 July 2014
Draft Request for Additional Information (Tac Nos. MF3085 and MF3086)
ML14055A5322014-03-11011 March 2014
Summary of Telephone Conference Call Held on January 30, 2014. Between the U.S. Nuclear Regulatory Commission and Exelon Generation Company, LLC, Concerning Requests for Additional Information Pertaining to the Limerick Generating Station,
ML14066A0972014-03-0707 March 2014
Draft Request for Additional Information
ML14030A0942014-01-29029 January 2014
Draft Request for Additional Information (TAC Nos. MF1399 and MF1400)
ML13309A0802013-12-11011 December 2013
Memorandum to File: Transcript for 10 CFR 2.206 Petition from Beyond Nuclear (Et Al) Regarding General Electric Mark I and Mark II Boiling-Water Reactors
ML13190A3522013-07-10010 July 2013
Notice of Forthcoming Teleconference with Exelon Generation Company, LLC
ML13156A0902013-06-26026 June 2013
Dseis Meeting Summary
ML13109A5392013-05-0303 May 2013
5/23/2013 - Meeting Notice: Forthcoming Meeting to Discuss the Draft Supplemental Environmental Impact Statement for the License Renewal of Limerick Generating Station, Units 1 and 2
ML12348A6962012-12-17017 December 2012
1/3/2013 - Notice of Forthcoming Meeting with Exelon Generation Company, LLC, to Discuss Requests for Additional Information Regarding Exelon Physical Security Plans
ML1227704332012-10-0101 October 2012
Minutes of the ACRS Plant License Renewal Subcommittee Meeting on September 5, 2012 (Open)
ML12139A0612012-06-25025 June 2012
Summary of Telephone Conference Call Held on May 16, 2012, Between the U.S. Nuclear Regulatory Commission and Exelon Generation Company, LLC, Concerning Requests for Additional Information Pertaining to the Limerick Generating Station, Lice
ML1210403072012-04-12012 April 2012
Draft Request for Additional Information
ML12083A2112012-04-11011 April 2012
Summary of Telephone Conference Call Held on February 23, 2012 Between the U.S. Nuclear Regulatory Commission and Exelon Generating Company, LLC, Concerning Request for Additional Information Pertaining to the Limerickgenerating Station, Li
ML1208602902012-03-26026 March 2012
Notice of Forthcoming Public Meeting with Exelon Generation to Discuss Future Fleet Submittal Regarding Licensed Operator Eligibility Requirements
ML1135300442011-12-19019 December 2011
Electronic Transmission, Draft Request for Additional Information Regarding Proposed Technical Specification Safety Limit Minimum Critical Power Ratio Changes
ML1133402312011-12-12012 December 2011
Request for Additional Information for Limerick Generating Station, Units 1 and 2 License Renewal Application-Scoping and Screening (TAC Nos. ME6555 and ME6556)
ML11272A2372011-10-26026 October 2011
Summary of Public Scoping Meetings Related to the Review of the Limerick Generating Station, Units 1 and 2, LRA
ML11251A0672011-09-12012 September 2011
Forthcoming Meeting to Discuss the License Renewal Process and Environmental Scoping for Limerick Generating Station, Units 1 and 2, License Renewal Application
ML11245A0082011-09-0606 September 2011
09/22/2011 Notice of Forthcoming Meeting to Discuss the License Renewal Process and Environmental Scoping for Limerick Generating Station, Units 1 and 2, License Renewal Application
ML1124104422011-08-29029 August 2011
Corrected Transcript for 10 CFR 2.206 Petition Regarding Limerick Scrams - Second Teleconference with Petitioner
ML1121606122011-08-0808 August 2011
Memorandum to File: Transcript for 10 CFR 2.206 Petition Regarding Limerick Scrams - Second Teleconference with Petitioner
ML1117803082011-06-28028 June 2011
Memo to File Documenting Transcript for 10 CFR 2.206 Petition Regarding Limerick Scrams - Initial Teleconference with Petitioner
ML1114403042011-05-24024 May 2011
Summary of Annual Assessment Meeting, Limerick Generating Station, on May 18, 2011
ML1103800542011-03-18018 March 2011
Summary of Telephone Conference Call Held on 1/28/11, Between the USNRC and Exelon Generation Company, LLC, Concerning the Proposed Limerick Generating Station, Units 1 and 2, License Renewal Application
ML1105502222011-02-24024 February 2011
Electronic Transmission, Draft Request for Additional Information Regarding Proposed Technical Specification Allowed Outage Time Extensions to Support Residual Heat Removal Service Water (RHRSW) Maintenance
ML1103304292011-02-0303 February 2011
Electronic Transmission, Draft Request for Additional Information Regarding Proposed Technical Specification Safety Limit Minimum Critical Power Ratio Changes
ML1032004852010-11-16016 November 2010
Electronic Transmission, Draft Request for Additional Information Proposed Technical Specification Changes to High Pressure Coolant Injection Equipment Room Delta Temperature Trip Setpoint
ML1032105082010-11-16016 November 2010
Units 1 & 2 - Electronic Transmission, Draft Request for Additional Information Regarding Request to Implement Emergency Action Level Scheme Change to NEI 99-01, Revision 5
2022-02-16
[Table view]
Category:Request for Additional Information (RAI)
MONTHYEARML24274A2372024-10-0707 October 2024
– Supplemental Information Needed for Acceptance of Requested Licensing Action Regarding Primary Containment Leakage Technical Specifications
ML24199A1842024-07-15015 July 2024
RAI-LAR for Limerick EPID: L-2024-LLA-0079- Use This Version
ML24197A0162024-07-12012 July 2024
NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC - Fleet Request - License Amendment Request to Adopt TSTF-591
ML24150A0242024-05-29029 May 2024
Notification of Commercial Grade Dedication Inspection (05000352/2024012 and 05000353/2024012) and Request for Information
ML24079A2922024-03-21021 March 2024
Draft Request for Additional Information Regarding Limerick Digital Instrumentation and Controls License Amendment Request (EPID L-2022-LLA-0140) - Non-Proprietary
ML23276B4642023-10-0303 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 Constellations 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
2024-07-15
[Table view] |
Text
July 8, 2010 MEMORANDUM TO: Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Peter Bamford, Project Manager /ra/
Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
SUBJECT:
LIMERICK GENERATING STATION, UNITS 1 AND 2 - ELECTRONIC TRANSMISSION, DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME3589 AND ME3590)
The attached draft request for additional information (RAI) was transmitted by electronic transmission on June 30, 2010, to Mr. Kevin Borton, at Exelon Generation Company, LLC (Exelon). This draft RAI was transmitted to facilitate the technical review being conducted by the Nuclear Regulatory Commission (NRC) staff and to support a conference call (if needed) with Exelon in order to clarify the licensees submittal. The draft RAI is related to Exelons submittal dated March 25, 2010, regarding Limerick Generating Station, Units 1 and 2, Measurement Uncertainty Recapture Power Uprate. The draft questions were sent to ensure that they were understandable, the regulatory basis was clear, and to determine if the information was previously docketed. Additionally, review of the draft RAI would allow Exelon to evaluate and agree upon a schedule to respond to the RAI. This memorandum and the attachment do not represent an NRC staff position.
Docket Nos. 50-352 and 50-353
Enclosure:
As stated
July 8, 2010 MEMORANDUM TO: Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Peter Bamford, Project Manager /ra/
Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
SUBJECT:
LIMERICK GENERATING STATION, UNITS 1 AND 2 - ELECTRONIC TRANSMISSION, DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME3589 AND ME3590)
The attached draft request for additional information (RAI) was transmitted by electronic transmission on July 6, 2010, to Mr. Kevin Borton, at Exelon Generation Company, LLC (Exelon). This draft RAI was transmitted to facilitate the technical review being conducted by the Nuclear Regulatory Commission (NRC) staff and to support a conference call (if needed) with Exelon in order to clarify the licensees submittal. The draft RAI is related to Exelons submittal dated March 25, 2010, regarding Limerick Generating Station, Units 1 and 2, Measurement Uncertainty Recapture Power Uprate. The draft questions were sent to ensure that they were understandable, the regulatory basis was clear, and to determine if the information was previously docketed. Additionally, review of the draft RAI would allow Exelon to evaluate and agree upon a schedule to respond to the RAI. This memorandum and the attachment do not represent an NRC staff position.
Docket Nos. 50-352 and 50-353
Enclosure:
As stated DISTRIBUTION:
Public RidsNrrPMLimerick LPL1-2 R/F Accession No.: ML101880020
- via memo OFFICE LPL1-2/PM CVIB/BC NAME PBamford MMitchell*
DATE 7/8/10 07/02/2010 OFFICIAL RECORD COPY
DRAFT REQUEST FOR ADDITIONAL INFORMATION LIMERICK GENERATING STATION, UNITS 1 AND 2 MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE REQUEST DOCKET NOS. 50-352 AND 50-353 By letter dated March 25, 2010 (Agencywide Documents Access and Management 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) CheckPlusTM 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 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 ft-lbs 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 (ASME) 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-lbs 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 BWR/2 through BWR/6 Vessels, was used with a bounding peak fluence of 1.9 x 1018 n/cm2 (E > 1.0 MeV) 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 NEDO-32205-A, Rev. 1, is applicable only to the materials Enclosure
DRAFT 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 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.
