Letter Sequence Approval |
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Results
Other: ML13357A331, ML15054A366, ML17059D129, RS-13-032, Overall Integrated Plan in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051), RS-13-122, First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051), RS-13-123, First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049), RS-14-200, Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051), RS-14-210, Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design- Basis External Events (Order Number EA-12-049), RS-16-024, Sixth Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049), RS-17-062, Report of Full Compliance with March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
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MONTHYEARRS-13-032, Overall Integrated Plan in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2013-02-28028 February 2013
Overall Integrated Plan in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)
Project stage: Other
ML13171A3152013-06-24024 June 2013
Request for Additional Information Overall Integrated Plan in Response to Order EA-12-051, Reliable Spent Fuel Pool Instrumentation
Project stage: RAI
RS-13-177, Response to Request for Additional Information - Overall Integrated Plan in Response to Commission Order Modifying License Requirements for Reliable Spent Fuel Pool Instrumentation (Order No. EA-12-051)2013-07-18018 July 2013
Response to Request for Additional Information - Overall Integrated Plan in Response to Commission Order Modifying License Requirements for Reliable Spent Fuel Pool Instrumentation (Order No. EA-12-051)
Project stage: Response to RAI
RS-13-122, First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2013-08-28028 August 2013
First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)
Project stage: Other
RS-13-123, First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2013-08-28028 August 2013
First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
Project stage: Other
ML13273A5382013-10-23023 October 2013
Interim Staff Evaluation and Request for Additional Information Regarding the Overall Integrated Plan for Implementation of Order EA-12-051, Reliable Spent Fuel Pool Instrumentation
Project stage: RAI
ML13357A3312014-01-0606 January 2014
Mega-Tech Services, LLC Technical Evaluation Report Regarding the Overall Integrated Plan for Limerick Generating Station, Units 1 and 2, TAC Nos.: MF0847 and MF0848
Project stage: Other
ML13337A6002014-01-10010 January 2014
Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Order EA-12-049 (Mitigation Strategies)
Project stage: Acceptance Review
RS-14-200, Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2014-08-28028 August 2014
Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)
Project stage: Other
RS-14-210, Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design- Basis External Events (Order Number EA-12-049)2014-08-28028 August 2014
Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design- Basis External Events (Order Number EA-12-049)
Project stage: Other
ML15054A3662015-03-17017 March 2015
Report for the Audit Regarding Implementation of Mitigating Strategies and Reliable Spent Fuel Pool Instrumentation Related to Orders EA-12-049 and EA-12-051
Project stage: Other
RS-15-101, Request for Schedule Relaxation from NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events.2015-04-0202 April 2015
Request for Schedule Relaxation from NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events.
Project stage: Request
RS-15-183, Request for Second Schedule Relaxation from NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events2015-07-0909 July 2015
Request for Second Schedule Relaxation from NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events
Project stage: Request
ML15194A0682015-07-20020 July 2015
180-Day Relaxation of Certain Schedule Requirements for Order EA-12-049 Issuance of Order to Modify Licenses with Regard to Requirements for Mitigating Strategies for Beyond Design Basis External Events
Project stage: Approval
RS-16-024, Sixth Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2016-02-26026 February 2016
Sixth Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
Project stage: Other
ML17059D1292017-02-28028 February 2017
Eighth Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design-Basis External Events
Project stage: Other
RS-17-062, Report of Full Compliance with March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2017-07-20020 July 2017
Report of Full Compliance with March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
Project stage: Other
2014-08-28
[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] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 20, 2015 Mr. Bryan C. Hanson President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
LIMERICK GENERATING STATION, UNIT 2 - 180-DAY RELAXATION OF CERTAIN SCHEDULE REQUIREMENTS FOR ORDER EA-12-049, "ISSUANCE OF ORDER TO MODIFY LICENSES WITH REGARD TO REQUIREMENTS FOR MITIGATION STRATEGIES FOR BEYOND DESIGN BASIS EXTERNAL EVENTS" (TAC NO. MF0848)
Dear Mr. Hanson:
The purpose of this letter is to inform Exelon Generation Company, LLC (Exelon, the licensee) of the disposition of the licensee's request by letter dated July 9, 2015 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15190A332), to relax the schedule for compliance with Order EA-12-049 for Limerick Generating Station (LGS), Unit 2.
By letter dated March 12, 2012 (ADAMS Accession No. ML12054A735), the U.S. Nuclear Regulatory Commission (NRC) ordered Exelon to take certain actions at Limerick Generating Station (LGS), Unit 2, associated with the Fukushima Near-Term Task Force Recommendations. Order EA-12-049 directed that actions be taken by licensees to develop and implement strategies to maintain or restore core cooling, containment cooling, and spent fuel pool cooling capabilities during beyond-design-basis external events.
Section IV of NRC Order EA-12-049 states that licensees proposing to deviate from requirements contained in the order may request that the Director of the Office of Nuclear Reactor Regulation relax or rescind certain requirements. Condition IV.A.2 of NRC Order EA-12-049 requires full implementation of the order requirements no later than two refueling cycles after submittal of the overall integrated plan, or by December 31, 2016, whichever comes first.
By letter dated April 15, 2014 (ADAMS Accession No. ML14065A528), the NRC granted relaxation of certain schedule requirements of Order EA-12-049 related to full containment wetwell venting capability until completion of the spring 2017 refueling outage for LGS, Unit 2, consistent with the requirements of NRC Order EA-13-109, "Issuance of Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," dated June 6, 2013 (ADAMS Accession No. ML13143A334). The NRC relaxation approval dated April 15, 2014, identified that the equipment and modifications required to implement the mitigating strategies required by Order EA-12-049 were to be completed and available for use in accordance with the original implementation schedule requirements, except for the primary containment venting strategy.
By letter dated April 2, 2015 (ADAMS Accession No. ML15092A833), the licensee informed the NRC of its additional LGS, Unit 2, request for schedule relaxation from compliance with Order EA-12-049 for no more than 90 days following restart from the spring 2015 refueling outage.
The additional schedule relaxation was requested to allow completion of two LGS Flexible
B. Hanson Coping Strategies (FLEX) equipment storage robust buildings. The NRC staff concluded that Exelon demonstrated good cause for relaxation and that appropriate compensatory measures were identified for the period of relaxation. Therefore, by letter dated April 29, 2015 (ADAMS Accession No. ML15106A013), the NRC staff approved the 90-day relaxation request.
By letter dated July 9, 2015, the licensee requested that the schedule relaxation from compliance with Order EA-12-049 be extended to 180 days for LGS, Unit 2, following restart from the spring 2015 refueling outage. The licensee's submittal stated that the additional relaxation is required due to further delays encountered in constructing the two LGS FLEX storage robust buildings. Specifically, Exelon identified that foundation-to-wall and wall-to-roof dowels were not installed per design drawings resulting in significant engineering redesign and construction rework. The redesign required that prefabricated construction materials be reordered with different dimensions. However, the new construction materials delivered to the site were incorrect and multiple attempts were required to obtain correctly fabricated construction materials. Additionally, the schedule delays extended the building projects into the peak construction season, resulting in difficulties obtaining qualified and trained craft resources in a timely manner.
The licensee's 180-day schedule relaxation request dated July 9, 2015, stated that corrective actions have been implemented to address the issues described above. The corrective actions include: additional resources to perform quality assurance verifications; additional engineering resources to ensure thorough review of design changes and shop drawings to mitigate errors; additional craft and supervision resources; and additional engineering hold points for the work activities to verify compliance with the design.
The licensee stated that LGS has implemented the mitigation strategy requirements imposed by NRC Order EA-12-049, with the exception of the primary containment venting strategy and the two FLEX equipment storage robust buildings, as discussed above. Therefore, the LGS FLEX mitigating strategy equipment is onsite and available, and the design and programmatic changes required to implement the LGS, Unit 2, mitigating strategies are complete.
In addition, the compensatory measures established during the current 90-day schedule relaxation period will remain in place for the entire 180-day extension request or until the FLEX buildings are completed. Specifically, in order to maintain post-deployment capability, key FLEX equipment, such as large portable generators and pumps, will be stored in locations that provide physical separation. These locations will not be susceptible to flooding events or building collapse, minimizing the likelihood of one event impacting both sets of equipment. If hurricane conditions are predicted, one set of portable FLEX equipment will be moved to a protected location.
The NRC staff has concluded that the construction quality issues, out-of-tolerance material deliveries and resource limitations reasonably prevented completion of the two FLEX equipment storage buildings within the previously approved 90-day schedule relaxation period. The staff also recognizes that Exelon has established corrective actions to address the construction delays and will maintain appropriate compensatory measures to maintain post deployment capabilities for the FLEX equipment.
In light of the facts presented in the licensee's July 9, 2015, letter, the NRC staff has determined that the licensee has demonstrated good cause to relax the NRC Order EA-12-049
B. Hanson implementation date for 180 days following restart from the spring 2015 refueling outage. The LGS, Unit 2 restarted from this outage on May 4, 2015. Therefore, the schedule relaxation will extend to October 31, 2015. The NRC staff also considered that, following the accident at Fukushima Dai-ichi, the NRC concluded that a sequence of events such as the Fukushima Dai-ichi accident is unlikely to occur in the United States based on the current regulatory requirements and existing plant capabilities. Given the plant-specific circumstances at LGS, and that implementation of the mitigating strategies relaxed by this letter will be completed before December 2016, the NRC staff approves the requested relaxation.
Accordingly, based upon the authority granted to the Director, Office of Nuclear Reactor Regulation, the requirement of implementation of mitigating strategies for LGS, Unit 2, associated with Order EA-12-049 is relaxed until no later than October 31, 2015. Full compliance with Order EA-12-049 remains the spring of 2017 refueling outage for LGS, Unit 2, as granted in NRC letter dated April 15, 2014, to allow the licensee sufficient time to implement a severe accident capable hardened containment wetwell vent.
If you have any questions, please contact John Hughey at 301-415-3204.
Sincerely,
&.&~. Directo,.r_ _ _ __
Office of Nuclear Reactor Regulation Docket No. 50-353 cc: Listserv
ML15194A068 OFFICE NRR/JLD/JOMB/PM NRR/JLD/LA OE NRR/JLD/JOMB/BC(A)
NAME JHughey Slent RFretz MHalter DATE 07/13/15 07/13/15 07/15/15 07/13/15 OFFICE OGC (NLO) NRR/JLD/D NRR/D NAME DCylkowski JDavis WDean DATE 07/16/15 07/16/15 07/20/15
