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Category:Letter
MONTHYEARML24022A2262024-01-22022 January 2024 (PBAPS) Unit 3 - Submittal of the Inservice Inspection (ISI) Owner'S Activity Report (OAR) for the 24th Refueling Outage for Unit 3 ML23346A2412024-01-17017 January 2024 Staff Assessment of Updated Seismic Hazards Following the NRC Process for the Ongoing Assessment of Natural Hazards Information (EPID L-2019-PMP-0061) - Letter IR 05000277/20234022024-01-11011 January 2024 Security Baseline Inspection Report 05000277/2023402 and 05000278/2023402 and Independent Spent Fuel Storage Installation Security Inspection 07200029/2023401 ML23354A1922024-01-0505 January 2024 Exemption from Select Requirements of 10 CFR Part 73 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting) ML23355A0622023-12-18018 December 2023 Independent Spent Fuel Storage Installation (Isfsi), Security Plan, Training and Qualification Plan, and Safeguards Contingency Plan 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 ML23305A1402023-12-13013 December 2023 Units 1 & 2; Nine Mile Point, Unit 2; Peach Bottom, Units 2 & 3; and Quad Cities, Units 1 and 2 - Issuance of Amendments to Adopt Traveler TSTF-580 ML23334A2502023-11-30030 November 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23270C0072023-11-29029 November 2023 Notice of Proposed Amendment to Decommissioning Trust Agreement ML23317A1192023-11-10010 November 2023 Constellation Energy Generation, LLC - 2023 Annual Report - Guarantees of Payment of Deferred Premiums ML23305A3472023-11-0101 November 2023 Revision of One Form That Implements the Radiological Emergency Response Plan (RERP) IR 05000277/20230032023-10-30030 October 2023 Integrated Inspection Report 05000277/2023003 and 05000278/2023003 and Exercise of Enforcement Discretion ML23286A0012023-10-13013 October 2023 Reply to a Notice of Violation (NOV) - NOV 05000277, 05000278/2023010-01 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 ML23271A1342023-10-11011 October 2023 Dtf Analysis Letter IR 05000277/20244012023-10-0505 October 2023 Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection 05000277/2024401 and 05000278/2024401 ML23265A1502023-09-22022 September 2023 License Amendment Request Revise a License Condition and Certain Technical Specifications to Remove Restrictions in Support of Decommissioning Activities ML23264A8682023-09-21021 September 2023 Independent Spent Fuel Storage Installation Registration of Dry Storage Canister WC-EOS-37PTH-008-B4L, WC-EOS-37PTH-007-B4L, and WC-EOS-37PTH-002-B4L IR 05000277/20230102023-09-15015 September 2023 Biennial Problem Identification and Resolution Inspection Report 05000277/2023010 and 05000278/2023010 and Notice of Violation ML23251A2022023-09-11011 September 2023 Cover Letter W/Report LR-N23-0045, and Peach Bottom Atomic Power Station, Units 2 and 3 - Notice of Proposed Amendment to Decommissioning Trust Agreement2023-09-0808 September 2023 and Peach Bottom Atomic Power Station, Units 2 and 3 - Notice of Proposed Amendment to Decommissioning Trust Agreement IR 05000277/20230052023-08-31031 August 2023 Updated Inspection Plan for Peach Bottom Atomic Power Station, Units 2 and 3 (Report 05000277/2023005 and 05000278/2023005) ML23158A1952023-08-30030 August 2023 R. E. Ginna - Issuance of Amendments to Adopt TSTF-273-A, Revision 2, Safety Function Determination Program Clarifications ML23232A0012023-08-19019 August 2023 Revision of One Procedure That Implements the Radiological Emergency Response Plan (Rerp). Includes EPP 06-009, Rev. 13 IR 05000277/20230112023-08-15015 August 2023 Comprehensive Engineering Team Inspection Report 05000277/2023011 and 05000278/2023011 ML23226A1112023-08-14014 August 2023 10 CFR 50.46 Annual Report IR 05000277/20230022023-08-0808 August 2023 Integrated Inspection Report 05000277/2023002 and 05000278/2023002 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 IR 05000277/20230402023-07-17017 July 2023 95001 Inspection Supplemental Report 05000277/2023040 and Follow-Up Assessment Letter ML23188A0532023-07-0707 July 2023 Registration of Use of Independent Spent Fuel Storage Installation (ISFSI) Casks ML23186A1272023-07-0606 July 2023 Response to Disputed Non-Cited Violation Documented in Peach Bottom Atomic Power Station, Units 2 and 3, Inspection Report 05000277/2022004 and 05000278/2022004 ML23178A0352023-06-27027 June 2023 Senior Reactor and Reactor Operator Initial License Examinations RS-23-077, Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations2023-06-16016 June 2023 Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations ML23151A4162023-05-31031 May 2023 Revision of One Form That Implements the Radiological Emergency Response Plan (RERP) for Wolf Creek Generating Station (WCGS) ML23150A2052023-05-30030 May 2023 Independent Spent Fuel Storage Installation (Isfsi), Annual Radiological Environmental Operating Report 80 January 1, 2022 Through December 31, 2022 RS-23-042, Application to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling2023-05-25025 May 2023 Application to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling ML23142A1602023-05-23023 May 2023 Summary of April 11, 2023, Public Observation Meeting with Constellation Energy Generation, LLC Re Proposed Exemption Request from Work Hour Requirements ML23132A1582023-05-18018 May 2023 Correction to Technical Specification 3.4.7 (Page 3.4-16) Issued in Amendment No. 337 ML23132A1532023-05-12012 May 2023 Transmittal of 2022 Annual Financial Reports WM 23-0009, Financial Assurance Requirements for Decommissioning Nuclear Power Reactors 10 CFR 50.75(f)(1)2023-05-10010 May 2023 Financial Assurance Requirements for Decommissioning Nuclear Power Reactors 10 CFR 50.75(f)(1) IR 05000277/20230012023-05-0808 May 2023 Integrated Inspection Report 05000277/2023001 and 05000278/2023001 ML23114A2522023-04-28028 April 2023 Request to Use a Provision of a Later Edition of the ASME Boiler & Pressure Vessel Code, Section XI 2024-01-05
[Table view] Category:Licensee Event Report (LER)
MONTHYEARML21196A4852021-07-16016 July 2021 LER 2-2021-002-00 for Peach Bottom Atomic Power Station, Unit 2, Safety Relief Valve Inoperability Due to Nitrogen Leakage from Braided Hose Wear 05000278/LER-2017-0012017-12-20020 December 2017 Reactor Pressure Boundary Leakage Due to Weld Failure in One-Inch Diameter Instrument Line, LER 17-001-00 for Peach Bottom Atomic Power Station (PBAPS), Unit 3 Regarding Reactor Pressure Boundary Leakage Due to Weld Failure in One-Inch Diameter Instrument Line 05000277/LER-2017-0012017-03-0808 March 2017 Emergency Diesel Generator Exhaust Stacks Nonconforming Design for Tornado Missile Protection, LER 17-001-00 for Peach Bottom Atomic Power Station (PBAPS), Unit 2 Regarding Emergency Diesel Generator Exhaust Stacks Nonconforming Design for Tornado Missile Protection 05000278/LER-2016-0012016-11-22022 November 2016 Leak in High Pressure Coolant Injection Drain Pipe Results in a Loss of Safety Function, LER 16-001-00 for Peach Bottom, Unit 3, Regarding Leak in High Pressure Coolant Injection Drain Pipe Results in a Loss of Safety Function 05000277/LER-2016-0012016-11-11011 November 2016 Leak in High Pressure Service Water Pipe Results in Condition Prohibited by Technical Specifications, LER 16-001-00 for Peach Bottom, Unit 2, Regarding Leak in High Pressure Service Water Pipe Results in Condition Prohibited by Technical Specifications 05000278/LER-2015-0012016-02-26026 February 2016 Loss of High Pressure Coolant Injection System Function as a Result of Failed Flow Controller Signal Converter, LER 15-001-00 for Peach Bottom, Unit 3, Regarding Loss of High Pressure Coolant Injection System Function as a Result of Failed Flow Controller Signal Converter ML13058A0432013-02-22022 February 2013 Submittal of Independent Spent Fuel Storage Installation (ISFSI) Cask Event Report ML1007702362010-03-12012 March 2010 60-Day Security Event Report 2-10-S01 ML0927401622009-09-30030 September 2009 LER 09-S01-00 for Peach Bottom, Units 2 & 3 Regarding Unescorted Access Granted to Contract Worker Who Did Not Provide Complete Work History Information ML1015505682009-07-10010 July 2009 Event Notification for Peach Bottom on Elevated Tritium Levels Found in On-Site Well ML0434503772004-12-10010 December 2004 LER-04-S01-00 for Peach Bottom Atomic Power Station (PBAPS) Unit 2 and Unit 3, 60 Day Security Event Report 2-04-S01 ML19095A7391976-12-0505 December 1976 Reporting Abnormal Occurrence No. 50-278-74-33 at Peach Bottom Atomic Power Station for Failure of Main Steam Line High Flow Switch dPIS-3-2-116C to Trip During Surveillance Test 2021-07-16
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Text
_v Exelon Generation.
February 22, 2013 ATTN: Document Control Desk Director, Spent Fuel Project Office Office of Nuclear Material Safety and Safeguards U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-277, 50-278 and 72-29 (ISFSI)
Subject:
Submittal of Independent Spent Fuel Storage Installation (ISFSI) Cask Event Report In accordance with ISFSI TN-68 Certificate of Compliance (CoC) Amendment 0 Technical Specifications Section 2.2.2, this report provides follow-up information regarding a 24-hour notification to the NRC on 1/25/13 (EN # 48698) concerning a non-compliance with cask Technical Specification limits. Four casks were loaded with fuel which had been cooled for 9.8 years instead of the required period of 10 years.
Abstract:
A recent review of historical ISFSI fuel characterization data found that in the 2001 ISFSI loading campaign, a total of four Unit 3 fuel assemblies were loaded into four dry storage casks (i.e., one assembly per cask) having been cooled for 9.8 years, with a decay heat value of 0.201 kW each, which is well below the 0.312 kW limit (TN-68 TS 2.1.1.). It has been determined that there were no actual thermal related concerns with the fuel or the associated cask components. However, this was contrary to the Functional and Operational limits of TS Section 2.1.1, Table 2.1.1-1, which requires the assemblies to have been cooled for 10 years. The decay heat of the assemblies has continued to decrease since their initial loading in 2001 and all assemblies currently meet the TS 2.2.1 limits. The fuel assemblies are in a safe condition as required by TS 2.2.1. There were no adverse impacts to the ability of the affected ISFSl casks to store fuel assemblies in a safe condition.
These casks were loaded under Transnuclear TN-68 CoC Amendment 0 (Certificate 1027). This notification is required pursuant to TN-68 TS Section 2.2.2. This issue has been entered into the Corrective Action Program.
ISFSI Cask Operatina Conditions and Status Prior to the Event:
The adverse condition was identified on 1/24/13 during a review of ISFSI fuel characterization data. All related structures, components and systems were operable at the time of discovery.
Description of the Event:
A recent review of historical ISFSI fuel characterization data found that in the ISFSI 2001 campaign, a total of four Unit 3 fuel assemblies were loaded into four dry cask storage casks (one assembly per cask) which had been cooled for 9.8 years, compared with the required cooling time of 10 years. The fuel assemblies had a decay heat value of 0.201 kW each, which is well below the 0.312 kW limit (TN-68 TS 2.1.1.). It has been determined that there were no actual thermal related concerns with the fuel or the associated cask components. However, this was contrary to the Functional and Operational limits of TS Section 2.1.1, Table 2.1.1-1, which requires the assemblies to have been cooled for 10 years. The decay heat of the assemblies has continued to decrease since their initial loading in 2001 and all assemblies currently meet the TS 2.2.1 limits. The fuel assemblies are in a safe condition as required by TS 2.2.1.
These casks were loaded under Transnuclear TN-68 CoC Amendment 0 (Certificate 1027). This notification is required pursuant to TN-68 TS Section 2.2.2. This issue has been entered into the Corrective Action Program.
Analysis of the Event:
A review of ISFSI fuel characterization data has determined that four Unit 3 fuel assemblies loaded in the June 2001 ISFSI campaign under TN-68 CoC Amendment 0 had cooling times of 9.8 years, vs. the 10 year cooling time requirement given in TN-68 TS Table 2.1.1-1. Specifically, the bundles are:
LJW874 - Loaded in ISFSI Cask TN-68-05 on 6/19/01, GE6 8x8, uranium content is 0.182 MTU, minimum initial bundle average enrichment of 2.99%,
assembly maximum burnup of 29.582 GWd/MTU, discharged date was 9/14/91.
LJW875 - Loaded in ISFSI Cask TN-68-06 on 6/26/01, GE6 8x8, uranium content is 0.182 MTU, minimum initial bundle average enrichment of 2.99%,
assembly maximum burnup of 29.577 GWd/MTU, discharged date was 9/14/91.
LJW882 - Loaded in ISFSI Cask TN-68-07 on 7/10/01, GE6 8x8, uranium content is 0.182 MTU, minimum initial bundle average enrichment of 2.99%,
assembly maximum burnup of 29.578 GWd/MTU, discharged date was 9/14/91.
LJW867 - Loaded in ISFSI Cask TN-68-08 on 7/17/01, GE6 8x8, uranium content is 0.182 MTU, minimum initial bundle average enrichment of 2.99%,
assembly maximum burnup of 29.580 GWd/MTU, discharged date was 9/14/91.
Based on the above burnups and enrichments, the minimum required cooling time for these bundles is 10 years, per TN-68 TS Table 2.1.1-1. This cooling time ensures that the maximum heat load per assembly does not exceed 0.312 kW (TN-68 TS 2.1.1 .E.ii).
Actual decay heat values for these fuel assemblies were calculated using Regulatory Guide 3.54. The actual decay heat value for each of the four fuel assemblies was 0.201 kW, which is well below the 0.312 kW limit given in TN-68 TS 2.1.1 .E.ii, so the ISFSI cask decay heat limit was met at all times.
The subject four fuel assemblies came into compliance with the TN-68 TS Table 2.1.1-1 when they achieved their 10 year cooldown time on 9/14/01.
Cause of the Event:
The cause of this event was a failure of the ISFSI Fuel Selector and Verifier to perform adequate verification of fuel history operating records when characterizing these fuel assemblies for ISFSI cask storage. Incomplete operating cycle history information was used for these 4 fuel assemblies. A contributing cause was that the procedural guidance in place at the time was not robust enough to ensure all characterization requirements were verified to be met.
At the time of this event (2001), characterization of fuel assemblies for ISFSI fuel storage was performed lAW SF-300, "TN-68 Cask Spent Fuel Assemblies Storage Selection and Document Requirements". This procedure specified the responsibilities of the ISFSI Fuel Selector and the ISFSI Fuel Selection Verifier, as well as the spent fuel characterization parameters required for TN-68 Dry Cask Storage and Disposal. Each of the 4 fuel assemblies were operated for a 4th operating cycle that was not accounted for during the fuel characterization process. For these four fuel assemblies, the additional cycle of operation resulted in an actual discharge date of 9/14/91 instead of the erroneous date of 3/31/87 originally used in the fuel characterization.
Per SF-300, the ISFSI Fuel Selector is responsible to ensure the fuel assemblies placed in TN-68 casks "meets the requirements of this procedure". The various parameters were listed, along with source document references. The various databases used were not controlled or validated at the time of this event, and the 4th operating cycle history was missed for the four fuel assemblies.
The ISFSI Fuel Selection Verifier "verifies that fuel meets the requirements of this procedure", per SF-300. No detailed guidance of how to perform this review was provided, and no independent verification or independent third party review was required of the ISFSI fuel characterization data.
Corrective Actions:
In 2011, procedure SF-300 was superseded by Exelon corporate procedure NF-AB-623, "BWR Fuel Selection and Documentation for Transnuclear TN-68 Dry Cask Loading."
Implementation of this procedure at Peach Bottom resulted in many improvements to the ISFSI fuel characterization process, including:
" A dedicated contractor (Transware) that does this work for all Exelon ISFSI sites.
" The ISFSI loadings are generated with controlled software (CASKLOADER) and controlled databases.
" Each ISFSI cask loading and database update is processed as a CC-AA-309 Design Analysis / Calculation
- Prior to each ISFSI campaign, there is a formal technical human performance brief for the fuel characterization process, which covers risk factor, consequences, and applicable operating experience.
A review of all fuel assemblies currently stored in ISFSI casks was performed and no additional assemblies were identified that did not meet the 10 year TS cooling time requirement. The more robust process for ISFSI fuel selection greatly reduces the chance of a similar event occurring in the future.
A TS exemption request will be submitted within 90 days from the date of this report to allow for continued storage of the affected fuel assemblies in their associated storage casks.
Additional information concerning spent fuel storage under this license may be obtained by contacting Dan Dullum, at 717-456-3339.
Sincerely, Patrick Navin Plant Manager, Peach Bottom Atomic Power Station Exelon Generation Company, LLC cc: US NRC, Administrator, Region 1 US NRC, Senior Resident Inspector CCN 13-16 I R 1466359