Similar Documents at Perry |
---|
Category:Letter type:L
MONTHYEARL-24-178, License Renewal Application Revision O - Supplement 42024-08-0808 August 2024 License Renewal Application Revision O - Supplement 4 L-24-189, License Renewal Application for Revision O - Supplement 12024-08-0707 August 2024 License Renewal Application for Revision O - Supplement 1 L-24-171, Spent Fuel Storage Cask Registration2024-07-30030 July 2024 Spent Fuel Storage Cask Registration L-24-108, License Renewal Application, Revision 0 - Supplement 32024-07-24024 July 2024 License Renewal Application, Revision 0 - Supplement 3 L-24-036, Annual 10 CFR 50.46 Report of Changes to or Errors in Emergency Core Cooling System Evaluation Models2024-06-27027 June 2024 Annual 10 CFR 50.46 Report of Changes to or Errors in Emergency Core Cooling System Evaluation Models L-24-020, License Renewal Application for the Perry Nuclear Power Plant Revision 0, Supplement 22024-06-27027 June 2024 License Renewal Application for the Perry Nuclear Power Plant Revision 0, Supplement 2 L-24-116, Response to License Renewal Environmental Report Severe Accident Mitigation Alternatives Requests for Additional Information and Request for Clarification2024-05-16016 May 2024 Response to License Renewal Environmental Report Severe Accident Mitigation Alternatives Requests for Additional Information and Request for Clarification L-24-085, Nudear Power Plant, Submittal of Emergency Plan, Revision 622024-05-0606 May 2024 Nudear Power Plant, Submittal of Emergency Plan, Revision 62 L-24-103, Response to NRC Regulatory Issue Summary 2024-01, Preparation & Scheduling of Operator Licensing Exams2024-05-0202 May 2024 Response to NRC Regulatory Issue Summary 2024-01, Preparation & Scheduling of Operator Licensing Exams L-24-096, Submittal of Annual Radiological Environmental Operating Report2024-04-22022 April 2024 Submittal of Annual Radiological Environmental Operating Report L-24-097, Submittal of 2023 Annual Radiological Effluent Release Report2024-04-22022 April 2024 Submittal of 2023 Annual Radiological Effluent Release Report L-24-083, Response to License Renewal Environmental Report Requests for Additional Information and Request for Clarification2024-04-15015 April 2024 Response to License Renewal Environmental Report Requests for Additional Information and Request for Clarification L-24-066, Response to Request for Additional Information Regarding 10 CFR 50.55a Request Number VR-9, Feedwater Check Valve Exercising Test Frequency2024-04-15015 April 2024 Response to Request for Additional Information Regarding 10 CFR 50.55a Request Number VR-9, Feedwater Check Valve Exercising Test Frequency L-24-057, Submittal of the Decommissioning Funding Status Report2024-03-28028 March 2024 Submittal of the Decommissioning Funding Status Report L-24-013, Annual Notification of Property Insurance Coverage2024-03-26026 March 2024 Annual Notification of Property Insurance Coverage L-24-076, Independent Spent Fuel Storage Installation - Supplemental Information for Request for Specific Exemption from Certain Requirements of 10 CFR 72.212 and 10 CFR 72.2142024-03-22022 March 2024 Independent Spent Fuel Storage Installation - Supplemental Information for Request for Specific Exemption from Certain Requirements of 10 CFR 72.212 and 10 CFR 72.214 L-24-053, Independent Spent Fuel Storage Installation, Request for Specific Exemption from Certain Requirements of 10 CFR 72.212 and 10 CFR 72.2142024-02-27027 February 2024 Independent Spent Fuel Storage Installation, Request for Specific Exemption from Certain Requirements of 10 CFR 72.212 and 10 CFR 72.214 L-24-050, Retrospective Premium Guarantee2024-02-22022 February 2024 Retrospective Premium Guarantee L-24-017, 30-Day Voluntary Report in Accordance with Industry Groundwater Protection Initiative2024-01-24024 January 2024 30-Day Voluntary Report in Accordance with Industry Groundwater Protection Initiative L-23-207, License Amendment Request (LAR) for Adoption of TSTF-264-A Revision 0, 3.3.9 and 3.3.10 - Delete Flux Monitors Specific Overlap Requirement SRs2024-01-24024 January 2024 License Amendment Request (LAR) for Adoption of TSTF-264-A Revision 0, 3.3.9 and 3.3.10 - Delete Flux Monitors Specific Overlap Requirement SRs L-23-171, CFR 50.55a Request Number VR-9. Revision 0, Feedwater Check Valve Exercising Test Frequency2023-12-0808 December 2023 CFR 50.55a Request Number VR-9. Revision 0, Feedwater Check Valve Exercising Test Frequency L-23-244, Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-12-0606 December 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation L-23-238, Mid-Cycle Revision to the Core Operating Limits Report for Operating Cycle 202023-11-10010 November 2023 Mid-Cycle Revision to the Core Operating Limits Report for Operating Cycle 20 L-23-052, Submittal of the Updated Safety Analysis Report, Revision 232023-10-27027 October 2023 Submittal of the Updated Safety Analysis Report, Revision 23 L-23-205, Supplement to Application for Order Consenting to Transfer of Licenses and Conforming License Amendments2023-09-12012 September 2023 Supplement to Application for Order Consenting to Transfer of Licenses and Conforming License Amendments L-23-206, Ohio National Pollutant Discharge Elimination System (NPDES) Permit 3IB00016 MD2023-09-12012 September 2023 Ohio National Pollutant Discharge Elimination System (NPDES) Permit 3IB00016 MD L-23-172, Quality Assurance Program Manual2023-08-31031 August 2023 Quality Assurance Program Manual L-23-188, Energy Harbor Nuclear Corp., Supplement to Application for Order Consenting to Transfer of Licenses and Conforming License Amendments2023-08-0707 August 2023 Energy Harbor Nuclear Corp., Supplement to Application for Order Consenting to Transfer of Licenses and Conforming License Amendments L-23-001, License Amendment Request to Remove the Table of Contents from the Technical Specifications2023-08-0707 August 2023 License Amendment Request to Remove the Table of Contents from the Technical Specifications L-23-174, 30-Day Voluntary Report in Accordance with Industry Groundwater Protection Initiative2023-07-19019 July 2023 30-Day Voluntary Report in Accordance with Industry Groundwater Protection Initiative L-23-146, License Renewal Application for the Perry Nuclear Power Plant2023-07-0303 July 2023 License Renewal Application for the Perry Nuclear Power Plant L-23-051, Plan, Nineteenth Inservice Inspection Summary Report2023-06-22022 June 2023 Plan, Nineteenth Inservice Inspection Summary Report L-23-050, 2022 Annual 10 CFR 50.46 Report of Changes to or Errors in Emergency Core Cooling System Evaluation Models2023-06-22022 June 2023 2022 Annual 10 CFR 50.46 Report of Changes to or Errors in Emergency Core Cooling System Evaluation Models L-22-249, License Amendment Request for Adoption of Technical Specification Task Force Traveler TSTF-276-A Revision 2, Change TS 3.8.1. AC Sources-Operating. to Clarify the Power Factor Requirements When Performing Diesel Gener2023-06-0505 June 2023 License Amendment Request for Adoption of Technical Specification Task Force Traveler TSTF-276-A Revision 2, Change TS 3.8.1. AC Sources-Operating. to Clarify the Power Factor Requirements When Performing Diesel Gener L-23-134, Response to NRC Regulatory Issue Summary 2023-01 Preparation and Scheduling of Operator Licensing Examinations2023-05-23023 May 2023 Response to NRC Regulatory Issue Summary 2023-01 Preparation and Scheduling of Operator Licensing Examinations L-23-065, Annual Financial Report2023-05-22022 May 2023 Annual Financial Report L-23-122, Annual Radiological Environmental Operating Report2023-04-26026 April 2023 Annual Radiological Environmental Operating Report L-23-121, Annual Radiological Effluent Release Report2023-04-26026 April 2023 Annual Radiological Effluent Release Report L-23-061, Submittal of the Decommissioning Funding Status Reports2023-03-31031 March 2023 Submittal of the Decommissioning Funding Status Reports L-23-049, Core Operating Limits Report for Operating Cycle 202023-03-30030 March 2023 Core Operating Limits Report for Operating Cycle 20 L-23-037, and Perry Nuclear Power Plant - Independent Spent Fuel Storage Installation Changes, Tests, and Experiments2023-03-29029 March 2023 and Perry Nuclear Power Plant - Independent Spent Fuel Storage Installation Changes, Tests, and Experiments L-23-066, Annual Notification of Property Insurance Coverage2023-03-21021 March 2023 Annual Notification of Property Insurance Coverage L-23-085, 1 to Emergency Plan2023-03-10010 March 2023 1 to Emergency Plan L-23-057, Energy Harbor Nuclear Corp Retrospective Premium Guarantee2023-02-20020 February 2023 Energy Harbor Nuclear Corp Retrospective Premium Guarantee L-23-017, Mid-Cycle Revisions to the Core Operating Limits Report for Operating Cycle 192023-01-31031 January 2023 Mid-Cycle Revisions to the Core Operating Limits Report for Operating Cycle 19 L-22-271, Emergency Plan2022-12-20020 December 2022 Emergency Plan L-22-272, Supplement to License Amendment Request to Revise the Methodology Used for Flood Hazard Analysis (EPID L-2021-LLA-0067) and Withdrawal of Exemption Requests (EPIDs L-2021-LLE-0022 and L-2021-LLE-0023)2022-12-16016 December 2022 Supplement to License Amendment Request to Revise the Methodology Used for Flood Hazard Analysis (EPID L-2021-LLA-0067) and Withdrawal of Exemption Requests (EPIDs L-2021-LLE-0022 and L-2021-LLE-0023) L-22-263, Spent Fuel Storage Cask Registration2022-12-12012 December 2022 Spent Fuel Storage Cask Registration L-22-254, Emergency Plan for Perry Nuclear Power Plant, Including EAL Matrix Revision 222022-11-18018 November 2022 Emergency Plan for Perry Nuclear Power Plant, Including EAL Matrix Revision 22 L-22-250, Mid-Cycle Revision to the Core Operating Limits Report for Operating Cycle 192022-11-0808 November 2022 Mid-Cycle Revision to the Core Operating Limits Report for Operating Cycle 19 2024-08-08
[Table view] |
Text
FENOC' Perry Nuclear Power Plant P.O. Box 97 10 Center Road Perry, Ohio 44081 RrstEnergy Nuclear Operating Company David B. Hamilton 440-280-5382 Vice President June 7, 2016 L-16-142 10 CFR 50.4 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852
SUBJECT:
Perry Nuclear Power Plant
,,, Docket No. 50-440, License No. NPF-58 Commitment to Modify Undervoltage/Degraded Voltage Protection Design As a result of an everit at the Perry Nuclear Power Plant (PNPP) that involved loss of power to Division one shutdown cooling during shutdown, a vulnerability was identified in the original design of the undervoltage/degraded voltage (UV/DV) protection circuitry. Specifically, the issue was revealed on February 11, 2016, when a single fuse on one phase of the division one 4.16 kV safety bus failed, causing the UV/DV protection circuitry to satisfy the coincidence logic and separate that bus from the offsite power source. This event was documented in PNPP Licensee Event Report 2016-003 (ADAMS Accession No. ML16104A024). This event was characterized as an unresolved item (URI) during the Special Inspection conducted at PNPP starting February 29, 2016, and documented in Reactive Inspection Report 05000440/2016008 (ADAMS Accession No. ML16057A039), dated May 25, 2016.
This issue involves the original UV/DV design, as documented in PNPP's original licensing safety evaluation report (NUREG-0887). FirstEnergy Nuclear Operating Company (FENOC) has determined that the design of the UV/DV circuits requires modification to address the issue.
Therefore, FENOC commit!:do installing a modification to the UV/DV protection scheme for the division one, two and three 4.16kV safety buses that will prevent a failed fuse from satisfying the coincident logic and causing a separation of the offsite power source from the safety bus when no UV/DV condition exists.
FENOC has initiated the design modification process and preliminarily identified a solution that is consistent with other industry UV/DV protection designs. As part of the design modification development, FENOC will determine if a license amendment is required to address UV/DV -
________________ Technical Specification setpoints or other-changes to.the current PNPP licensing basis. The - ----------
new design will be finalized and any required license amendment requests will be submitted to the NRC by November 1, 2016.
- To preclude the risks associated with an inadvertent separation of the offsite power source from the safety buses during installation, the modification will require installation during a refueling outage. However, even during a refueling outage, the new design must be installed and tested on a divisional basis to manage shutdown risk. _As such, FENOC commits to have the new design installed and tested by the second refueling outage after NRC approval of any required
. Aool Mfll
Perry Nuclear Power Plant L-16-142 Page2 license amendment request, but no later than startup from refuel outage 1R18 scheduled to begin in March 2021. ",
Based on a review of the applicable design basis documents and recent surveillance history, the current configuration of the UV/DV protection circuitry remains capable of performing its intended safety function, which is to detect a sustained degraded voltage condition or loss of power to its associated 4.16kV s'afety bus, then *separate the offsite source and start the associated emergency diesel generator (EDG). Therefore, FENOC has determined that the UV/DV protection circuitry and the associated 4.16kV safety buses remain operable in accordance with the plant's Technical Specifications. The condition that occurred on February 11, 2016, is bounded by the worst case single failure, which is the loss of an EDG.
It is unlikely that a similar fuse failure would occur based on the evaluation by FENOC and the vendor, which found this issue to be an isolated event. No previous instances of this type of failure have been observed at PNPP, and examination of additional fuses of the same part number from the same manufacturing lot revealed no evidence that the isolated manufacturing error is a recurring event.
Until final installation of the modification, the following compensatory actions will remain in place:
- An operations standing order was issued to address operator response in the event a similar fuse malfunction was to occur.
- Operators have received informational training on the expected response to a fuse malfunction in the UV/DV voltage circuitry.
- Operators will be periodically retrained on the fuse malfunction through licensed operator continuing training. .,
- A work order package with spare fuses is staged to replace a failed fuse in the event a similar malfunction was to occur.
-- Attachment 1 identifies the regulatory commitments contained in this letter. If there are any questions or if additional information is required, please contact Mr. Nicola F. Conicella, Manager - Regulatory Compliance, at 440-280-5415.
/ Sincerely, David B. Hamilton Attachments:
- 1. Regulatory Commitment List cc: Director, Office of Nuclear Reactor Regulation (NRR)
NRC Region Ill Administrator NRC Resident Inspector NRR Project Manager
Attachment 1 Perry Nuclear power Plant L-16-142 Regulatory Commitment List Page 1 of 1 The following list identifies those actions committed to by FirstEnergy Nuclear Operating Company (FENOC) for the Perry Nuclear Power Plant (PNPP), in this document. Any other actions discussed in the"_submittal represent intended or planned actions by FENOC. They are described only as information and are not Regulatory Commitments. Please notify Mr. Nicola F.
Conicella, Manager - Regulatory Compliance, at 440-280-5415, of any questions regarding this document or associated Regulatory Commitments.
Regulatory Commitment Due Date
- 1. FENOC will implement a design modification of the The second refueling outage Undervoltage/Degraded Voltage (UV/DV) protection after NRC approval of any scheme for the Division one, two and three 4.16kV safety required license amendment buses that will prevent a failed fuse from improperly request but no later than satisfying the coincident logic and causing a separation of startup from refuel outage the offsite power source from the safety bus when no 1R18 scheduled to begin in UV/DV condition exists. March 2021.
- 2. Until final installation of the modification compensatory The second refueling outage actions will remain in place. after NRC approval of any required license amendment request but no later than startup from refuel outage 1R18 scheduled to begin in March 2021.