|
---|
Category:Enforcement Action
MONTHYEARML20062B6572020-03-0303 March 2020 EA-19-114 Limerick Generating Station Units 1 and 2 - NRC Investigation Report No. 1-2019-011 and Notice of Violation (Cover Letter Only) IR 05000353/20110092011-12-0808 December 2011 EA-11-221 Limerick - Final Significance Determination for a White Finding with Assessment Follow-Up and Notice of Violation (NRC Inspection Report No. 05000353/2011009) IR 05000353/20090072009-12-16016 December 2009 EA-09-183, Limerick, Notice of Violation (Limerick Generating Station - NRC Investigation Report No. 1-2009-012) and NRC Inspection Report 05000352 & 05000353/2009007 ML0201101732002-01-11011 January 2002 EA-01-293, Limerick Unit 2, White Finding and NOV 2020-03-03
[Table view] Category:Notice of Violation
MONTHYEARIA-22-025, NRC Office of Investigations Report 1-2022-007 and Notice of Violation2022-06-0707 June 2022 IA-22-025: NRC Office of Investigations Report 1-2022-007 and Notice of Violation ML14105A3382014-05-0101 May 2014 Sliv Notice of Violation ML14055A3712014-02-24024 February 2014 IA-14-002 - Notice of Violation ML12306A3972012-11-0101 November 2012 IR 05000352-12-004 and 0500353-12-004; 07-01-12 - 09-30-12; Limerick Generating Station NRC Integrated Inspection Report and Notice of Violation ML12264A4792012-09-20020 September 2012 IA-12-043- Limerick Individual, Notice of Violation IR 05000353/20110092011-12-0808 December 2011 EA-11-221 Limerick - Final Significance Determination for a White Finding with Assessment Follow-Up and Notice of Violation (NRC Inspection Report No. 05000353/2011009) IR 05000353/20090072009-12-16016 December 2009 EA-09-183, Limerick, Notice of Violation (Limerick Generating Station - NRC Investigation Report No. 1-2009-012) and NRC Inspection Report 05000352 & 05000353/2009007 ML0201101732002-01-11011 January 2002 EA-01-293, Limerick Unit 2, White Finding and NOV 2022-06-07
[Table view] 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
REGION I
475 ALLENDALE ROAD KlNG OF PRUSSlA. PA 19406-1415
SUBJECT:
FINAL SIcNIFICANCE DETERMINATION FOR A WHITE FINDING WITH ASSESSMENT FOLLOW-UP AND NOTTCE OF VTOLATION INRC INSPECTION REPORT NO. 05000353/201 10091 - LlMERTCK GENERATING STATION, UNIT 2
Dear Mr. Pacilio:
This letter provides you the final significance determination for the preliminary White finding discussed in the U.S. Nuclear Regulatory Commission (NRC) letter dated November 4,2011, as well as the NRC assessment of the current performance of the Exelon Generation Company, LLC (Exelon) Limerick Generating Station (Limerick) Unit 2. This updated assessment of Limerick Unit 2 supplements, but does not supersede, the NRC annual assessment letter issued on March 4,2A11 (M1110620350)1.
As described in the November 4,2011 letter, the self-revealing finding was recognized by Limerick staff on May 23, 2011, and reviewed during an NRC inspection completed on September 30, 2011. The finding involved the failure by Exelon to ensure sufficient technical guidance was contained in operating procedures to: (1) ensure that a feedwater (FW) motor operated valve (MOV) could close against expected system differential pressures; and (2)
prevent operators from attempting to close FW MOVs out of sequence resulting in differential pressures for which they are not designed. As a result, two FW valves (one of which was a primary containment isolation valve (PCIV)) failed to fully shut when Exelon operators at Limerick attempted to close them in order to secure a FW system flush. Consequently, from April 23 to May 23,2011, the PCIV was inoperable for greater than its Technical Specification allowed outage time. Additionally, because the Limerick Unit 2 reactor core isolation cooling (RCIC) system discharges to the reactor via the B FW header, with the affected FW valves cracked open, a flow path existed for RCIC to flow to the main condenser instead of the reactor.
As a result, in this configuration, RCIC would not have been able to supply design flow to the reactor. Consequently, for this same time period, the Limerick Unit 2 RCIC system was also
Designation in parentheses refers to an Agency-wide Documents Access and Management System (ADAMS) accession number. Documents referenced in this letter are publicly-available using the accession number in ADAMS.
M. Pacilio 2 inoperable for greater than its Technical Specification allowed outage time. The finding was presented at an exit meeting held at the conclusion of the inspection on October 7,2011, and is described in detail in the subject inspection report (NRC Inspection Report 05000352/2U1044 and 050003531201 1 004; ML113088146).
The November 4, 2011,letter also included an offer for Exelon to attend a regulatory conference or reply in writing to provide its position on the facts and assumptions the NRC used to arrive at the finding and its safety significance. In a letter dated November 14,2011, William Maguire, Limerick Site Vice President, indicated that Exelon did not contest the characterization of the risk significance of this finding and that Exelon declined its opportunity to discuss this issue in a regulatory conference or to provide a written response. After considering the information developed during the inspection, the NRC has concluded that the inspection finding is of low to moderate safety significance, and is therefore appropriately characterized as White.
As a result of the NRC review of the performance at Limerick Unit 2, including this White finding in the Mitigating Systems Cornerstone, the NRC has assessed Limerick Unit 2 to be in the Regulatory Response column of the NRC Action Matrix, retroactive to the beginning of the third cafendar quarter of 2011. Therefore, we plan to conduct a supplemental inspection using Inspection Procedure 95001, "lnspection for One or Two White lnputs in a Strategic Performance Area," when Exelon staff notify us of their readiness for this inspection. This inspection is conducted to provide assurance that the root cause and contributing causes of risk significant performance issues are understood, the extent of condition is identified, and the corrective actions are sufficient to prevent recurrence.
The NRC has also determined that the finding involved violations of NRC regulations, as cited in the enclosed Notice of Violation (Notice), and described in detail in the subject inspection report.
In accordance with the NRC Enforcement Policy, the Notice is considered an escalated enforcement action because it is associated with a White finding.
The NRC has concluded that information regarding: (1) the reason for the violations; (2) the actions planned or already taken to correct the violations and prevent recurrence; and, (3) the date when full compliance was achieved, is already adequately addressed on the docket in NRC lnspection Report 0500035212011004 and 05000353/2011004 and this letter. As described in the subject inspection report, upon identification of the issue on May 23,2011, Exelon staff fully closed the FW valves, which restored operability to the RCIC system and the PCIV. Additionally, Exelon has planned long-term corrective actions to address this issue, including revising the applicable procedure, performing maintenance and testing on the valves, and revising the scope for preventative maintenance of the valves. Therefore, Exelon is not required to respond to this letter unless the description therein does not accurately reflect Exelon's corrective actions or its position.
M. Pacilio 3 In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter, its enclosure, and your response, if you choose to provide one, will be made available electronically for public inspection in the NRC Public Document Room located at NRC Headquarters in Rockville, MD, and from the NRC's Agency-wide Documents Access and Management System (ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html. To the extent possible, your response, if you choose to provide one, should not include any personal privacy, proprietary, or safeguards information so that it can be made available to the Public without redaction.
Regional Administrator Docket No, 50-353 License No. NPF-85 Enclosure:
Notice of Violation cc w/encl: Distribution via ListServ