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MONTHYEARML21127A1322021-05-11011 May 2021 Summary of April 16, 2021, Conference Call with Representatives of Wolf Creek Generating Station Regarding the Spring 2021 Steam Generator Tube Inspections Project stage: Other 2021-05-11
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Category:Letter
MONTHYEARML24025A0992024-01-25025 January 2024 Withdrawal of Request for Exemption from Specific 10 CFR Part 73 Requirements ML24018A0792024-01-22022 January 2024 Individual Notice of Consideration of Issuance of Amendment to Renewed Facility Operating License, Proposed Nshcd and Opportunity for a Hearing (EPID L-2024-LLA-0007) (Letter) ML24018A1382024-01-18018 January 2024 Inservice Inspection Request for Information ML24018A2482024-01-18018 January 2024 License Amendment Request to Modify the Implementation Date of License Amendment No. 238 IR 05000482/20230042024-01-11011 January 2024 Integrated Inspection Report 05000482/2023004 ML23356A0722024-01-0404 January 2024 Supplemental Information Needed for Acceptance of Requested Licensing Actions Exemption from Specific 10 CFR Part 73N Requirements (EPID L-2023-LLE-0048) (Redacted Version) WO 23-0002, Operating Corp., Summary of Actions Implemented for EA-18-165, Confirmatory Order, NRC Inspection Report 05000482/2019010 and NRC Investigation Report 4-2018-0082023-12-26026 December 2023 Operating Corp., Summary of Actions Implemented for EA-18-165, Confirmatory Order, NRC Inspection Report 05000482/2019010 and NRC Investigation Report 4-2018-008 ML23348A3662023-12-18018 December 2023 Notification of an NRC Fire Protection Baseline Inspection (NRC Inspection Report 05000482 2024012) and Request for Information ML23334A2502023-11-30030 November 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23299A2662023-11-29029 November 2023 Issuance of Amendment No. 238 Modified Implementation Date of License Amendment No. 237 ML23331A4972023-11-27027 November 2023 Supplement to License Amendment Request to Modify the 90-Day Implementation of License Amendment No. 237 ML23325A2112023-11-20020 November 2023 Submittal of Request for Exemption from Specific Provisions in 10 CFR 73.55 ML23320A2772023-11-16016 November 2023 License Amendment Request to Revise Ventilation Filter Testing Program Criteria in Technical Specification 5.5.11.b and Administrative Correction of Absorber in Technical Specification 5.5.11 ML23311A2082023-11-0909 November 2023 Reassignment of U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch IV ML23305A3472023-11-0101 November 2023 Revision of One Form That Implements the Radiological Emergency Response Plan (RERP) ML23292A3592023-10-19019 October 2023 License Amendment Request to Modify the 90-Day Implementation of License Amendment No. 237 ML23292A3572023-10-19019 October 2023 Operating Corporation, Request for Correction in Response to Issuance of Amendment No. 237 and Corresponding Safety Evaluation ML23277A2772023-10-11011 October 2023 Regulatory Audit Summary Concerning Review of Request Number CI3R-01 for Proposed Alternative Inspection Frequency for Containment Unbonded Post Tensioning System Components ML23284A2392023-10-11011 October 2023 NRC Initial Operator Licensing Examination Approval 05000482/2023301 ML23276B4552023-10-0303 October 2023 Technical Specification 5.6.8 Post Accident Monitoring (PAM) Report 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 ML23256A2062023-09-14014 September 2023 Withdrawal of Requested Licensing Action Exemption from Specific 10 CFR Part 73 Requirements ML23165A2502023-08-31031 August 2023 Issuance of Amendment No. 237 Request for Deviation from Fire Protection Requirements ML23243A0002023-08-31031 August 2023 Wolf Generating Station - Withdrawal of Request for Exemption from Specific 10 CFR Part 73 Requirements IR 05000482/20230052023-08-23023 August 2023 Updated Inspection Plan for Wolf Creek Nuclear Operating Corporation, Unit 1 (Report 05000482/2023005) - Mid-Cycle Letter 2023 ML23232A0012023-08-19019 August 2023 Revision of One Procedure That Implements the Radiological Emergency Response Plan (Rerp). Includes EPP 06-009, Rev. 13 ML23221A3932023-08-0909 August 2023 Submittal of Request for Exemption from Specific 10 CFR Part 73 Requirements ML23220A4222023-08-0808 August 2023 Supplement to License Amendment Request (LAR) for Deviation from Fire Protection Program Requirements ML23201A1212023-08-0707 August 2023 Issuance of Amendment No. 236 Revision to Technical Specifications to Adopt TSTF-554, Revise Reactor Coolant Leakage Requirements ML23130A2902023-07-26026 July 2023 Issuance of Amendment No. 235 Revision to Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections IR 05000482/20230022023-07-11011 July 2023 Integrated Inspection Report 05000482/2023002 ML23167A0042023-06-26026 June 2023 Audit Plan to Support Review of Request for Alternative Containment Inservice Inspection Frequency IR 05000482/20234012023-06-21021 June 2023 Security Baseline Inspection Report 05000482/2023401 ML23171B1312023-06-20020 June 2023 Additional Supplement to License Amendment Request to Adopt TSTF-577-A, Revision 1, Revised Frequencies for Steam Generator Tube Inspections ML23151A4162023-05-31031 May 2023 Revision of One Form That Implements the Radiological Emergency Response Plan (RERP) for Wolf Creek Generating Station (WCGS) ET 23-0006, CFR 50.55a Request Number CI3R-01 for the Third Containment Inservice Inspection Program Interval for Proposed Alternative Frequency to Containment Unbonded Post-Tensioning System Components2023-05-17017 May 2023 CFR 50.55a Request Number CI3R-01 for the Third Containment Inservice Inspection Program Interval for Proposed Alternative Frequency to Containment Unbonded Post-Tensioning System Components WO 23-0014, Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations2023-05-17017 May 2023 Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations 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) ML23135A1172023-05-0808 May 2023 Redacted Version of Revision 36 to Updated Safety Analysis Report ML23117A2112023-04-27027 April 2023 Annual Exposure Report (2022) ML23117A1342023-04-27027 April 2023 2022 Annual Radioactive Effluent Release Report Report 46 2024-01-04
[Table view] Category:Meeting Summary
MONTHYEARML23303A2182023-11-0606 November 2023 Summary of October 16, 2023, Pre-Submittal Teleconference with Wolf Creek Nuclear Operating Corporation Regarding a License Amendment Request to Adopt TSTF-505 for Wolf Creek Generating Station, Unit 1 ML22147A0932022-06-0606 June 2022 2021 Annual Assessment Public Meeting Summary ML22011A0862022-01-11011 January 2022 Summary of January 10, 2022, Pre-Submittal Teleconference with Wolf Creek Nuclear Operating Corporation Regarding a License Amendment Request to Use Portable Lighting for Wolf Creek Generating Station, Unit 1 ML21333A1312021-12-0707 December 2021 Summary of Meeting with Wolf Creek Nuclear Operating Corporation Diesel Generator Completion Time License Amendment Request for Wolf Creek Generating Station ML21200A1102021-07-21021 July 2021 Summary of July 13, 2021, Pre-Submittal Teleconference with Wolf Creek Nuclear Operating Corporation Regarding a Temporary Emergency Preparedness Exercise Exemption Request ML21140A3892021-05-24024 May 2021 Riv Column 1 EOC 2020 Public Meeting Summary ML21127A1322021-05-11011 May 2021 Summary of April 16, 2021, Conference Call with Representatives of Wolf Creek Generating Station Regarding the Spring 2021 Steam Generator Tube Inspections ML20332A0422020-12-0101 December 2020 Summary of November 19, 2020, Pre-Submittal Teleconference with Wolf Creek Nuclear Operating Corporation an Emergency Response Organization Staffing License Amendment Request ML20332A0462020-11-30030 November 2020 Summary of November 18, 2020, Pre-Submittal Teleconference with Wolf Creek Nuclear Operating Corporation a Risk-Informed Generic Safety Issue (GSI)-191 License Amendment Request ML20189A2832020-07-0707 July 2020 Summary of Region IV Annual Assessment Public Meeting ML19143A4182019-05-21021 May 2019 Summary of Public Meeting with Wolf Creek Nuclear Operation Corporation ML19140A4742019-05-20020 May 2019 Closed Meeting with Wolf Creek Nuclear Operating Corporation to Conduct a Mediation Session Regarding Falsification of Documentation Associated with Licensee Maintenance Activities ML18313A2542018-11-16016 November 2018 Summary of Public Meeting with Wolf Creek Nuclear Operating Corporation Regarding License Amendment Request for Transition to Westinghouse Core Design and Safety Analyses for Wolf Creek Generating Station ML17276B4892017-10-23023 October 2017 9/25/17 Summary of Public Meeting with Wolf Creek Nuclear Operating Corporation Regarding the Proposed LAR for Change in Emergency Plan Staff Augmentation Response Times for Wolf Creek Generating Station (CAC No. MG0174; EPID L-2017-LRM-001 ML16271A4822016-09-27027 September 2016 Summary of Regulatory Conference to Discuss Safety Significance of Wolf Creek Generating Station Emergency Generator Excitation Diode Apparent Violation ML16250A1652016-09-0909 September 2016 8/25/16 Summary of Preapplication Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Amendment Request to Transition to Westinghouse Analyses Methodologies and Alternate Source Term at Wolf Creek Generating Station ML16243A5132016-09-0101 September 2016 Summary of August 25, 2016, Public Meeting with Wolf Creek Nuclear Operating Corporation and Amerenue Regarding a Proposed Application for a New Technical Specification for the Class 1E Electrical Equipment Air Conditioning System (MF8118 a ML16106A1742016-04-22022 April 2016 Summary of Meeting with Wolf Creek Nuclear Operating Company to Discuss the Generic Safety Issue (GSI)-191 Testing Plan/Fiber Penetration and Head Loss Testing Approach for Wolf Creek Generating Station ML15182A0952015-06-30030 June 2015 Summary of Annual Assessment Meeting with Wolf Creek Nuclear Operating Corporation (WCNOC) Regarding Wolf Creek Generating Station 2014 Performance ML14188C4812014-07-0707 July 2014 Summary of Annual Assessment Meeting with Wolf Creek Generating Station ML14134A1842014-05-14014 May 2014 Summary of Public Meeting to Discuss an Apparent Violation Identified at Wolf Creek Generating Station ML14038A3852014-02-0606 February 2014 1/22/2014 - Summary of Public Meeting to Discuss Corrective Actions Implemented to Address the Chilling Effect Letter ML13221A2132013-08-12012 August 2013 8/7/2013 - Summary of Preapplication Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Long-Term Corrective Actions for Water Hammer Events in the Essential Service Water System at Wolf Creek ML13221A2152013-08-12012 August 2013 7/30/2013 - Summary of Preapplication Meeting with Wolf Creek Nuclear Operating Company to Discuss Proposed Transition to Westinghouse Methodologies for Core Design and Non-LOCA Safety Analyses at Wolf Creek Generating Station ML13121A4892013-05-0101 May 2013 End of Cycle Meeting Summary 4-18-13 ML13077A0732013-04-0101 April 2013 Summary of 2/28/13 and 3/11/13 Conference Calls with Licensee and Its Contractors Ongoing Steam Generator Tube Inspection Activities During Refueling Outage 19 ML12355A6922012-12-20020 December 2012 Summary of Public Meeting with Wolf Creek Nuclear Operating Corp Re Improved Station Performance ML12276A2652012-11-0101 November 2012 Meeting Summary with Wolf Creek Nuclear Operating Corporation to Discuss Transition from Current to NRC-Approved Westinghouse Methodologies for Performing the Core Design and Non-LOCA Safety Analysis at Wolf Creek ML12191A1742012-07-0909 July 2012 6/25/2012 Summary of Public Meeting with Wolf Creek Nuclear Operating Corporation ML12191A1462012-07-0606 July 2012 6/26/2012 - Summary of Public Meeting to Discuss Performance of Wolf Creek Nuclear Operating Corporation ML13246A3802012-05-0808 May 2012 Email from M. King, NRR on Ioeb Clearinghouse Screening Summary for Tuesday, May 8, 2012 ML1207601012012-03-16016 March 2012 Summary of Public Meeting with Wolf Creek Nuclear Operating Corporation ML13246A3782012-02-16016 February 2012 Email from M. King, NRR on Ioeb Clearinghouse Screening Summary for Thursday, February 16, 2012 ML13246A3772012-01-31031 January 2012 Email from M. King, NRR on Ioeb Clearinghouse Screening Summary for Tuesday, January 31, 2012 ML13246A3762012-01-23023 January 2012 Email from M. King, NRR on Ioeb Clearinghouse Screening Summary for Monday, January 23, 2012 ML12011A1012012-01-19019 January 2012 Summary of Meeting with NEI and to Address Di&C Issues ML13246A3742012-01-17017 January 2012 Email from M. King, NRR on Ioeb Clearinghouse Screening Summary for Tuesday, January 17, 2012 ML1110104292011-04-11011 April 2011 Summary of Annual Performance Assessment Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Wolf Creek Generating Station Performance for the NRC Inspection Period Ending December 31, 2010 ML1024506282010-09-0202 September 2010 Summary of Public Meeting with Wolf Creek Nuclear Operating Corporation ML1013404892010-05-14014 May 2010 Summary of Annual Performance Assessment Meeting with Wolf Creek Nuclear Operating Corporation to Discuss the Wolf Creek Generating Station Performance for the NRC Inspection Period from January 1 Through December 31, 2009 ML0933805662009-12-17017 December 2009 Summary of Meeting with Union Electric Company and Wolf Creek Nuclear Operating Company to Discuss NRC Requests for Additional Information on Generic Letter 2004-02 Sent 7/31/2009 and 8/27/2009, Respectively ML0933702032009-12-0303 December 2009 Summary of Public Meeting for Wolf Creek Generating Station ML0924607142009-09-28028 September 2009 Summary of Meeting with Union Electric Co., and Wolf Creek, to Discuss Draft Requests for Additional Information on GL 2004-02 for Callaway, Unit 1, and Wolf Creek ML0911205282009-04-21021 April 2009 Summary of Annual Performance Assessment Meeting for Wolf Creek Generating Station ML0902102062009-01-23023 January 2009 Summary of Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Changes to Post Fire Shutdown Unresolved Items Analysis Methods Pre-Application for Wolf Creek Generating Station ML0829607972008-10-22022 October 2008 Summary of Meeting with Wolf Creek, Discussing Several Initiatives Being Implemented to Improve Plant Performance ML0817706682008-06-25025 June 2008 Summary of Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Several Initiatives That Were Being Implemented to Improve Plant Performance at Wolf Creek ML0813606472008-06-10010 June 2008 05/01/2008-Summary of Public Meeting on Safety Evaluation Report with Open Items Regarding the Wolf Creek Generating Station License Renewal Review ML0812803052008-05-0808 May 2008 Summary of Conference Call with Wolf Creek Nuclear Operating Corporation Spring 2008 Steam Generator Tube Inspections During Refueling Outage 16 at Wolf Creek Generating Station ML0807904692008-04-10010 April 2008 Summary of Teleconference with Wolf Creek Nuclear Operating Corporation, Ameren Union Electric Company for Callaway Plant, and Performance Contracting, Inc. Containment Sump Head Loss Testing 2023-11-06
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May 11, 2021 Mr. Cleveland Reasoner Chief Executive Officer and Chief Nuclear Officer Wolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839
SUBJECT:
WOLF CREEK GENERATING STATION, UNIT 1 -
SUMMARY
OF APRIL 16, 2021, CONFERENCE CALL WITH REPRESENTATIVES OF WOLF CREEK GENERATING STATION REGARDING THE SPRING 2021 STEAM GENERATOR TUBE INSPECTIONS (EPID L-2021-NFO-0003)
Dear Mr. Reasoner:
On April 16, 2021, the U.S Nuclear Regulatory Commission staff participated in a conference call with representatives of the Wolf Creek Generating Station (the licensee) regarding the ongoing steam generator inspection activities at the Wolf Creek Generating Station, Unit 1.
A summary of the conference call is provided as Enclosure 1. A list of participants is provided as Enclosure 2.
If you have any questions regarding this matter, please contact me at (301) 415-3168 or by e-mail to Samson.Lee@nrc.gov.
Sincerely,
/RA/
Samson S. Lee, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-482
Enclosures:
- 1. Conference Call Summary
- 2. List of Participants cc: Listserv
SUMMARY
OF APRIL 16, 2021 CONFERENCE CALL REGARDING SPRING 2021 STEAM GENERATOR TUBE INSPECTIONS AT WOLF CREEK GENERATING STATION, UNIT 1 DOCKET NO. 50-482 On April 16, 2021, the U.S. Nuclear Regulatory Commission staff participated in a conference call with Wolf Creek Nuclear Operating Corporation (the licensee), regarding the ongoing steam generator (SG) tube inspection activities at Wolf Creek Generating Station, Unit 1 (Wolf Creek) during refueling outage (RFO) 24. The licensee estimated that the data acquisition and analysis were about 80 percent complete at the time of the call.
The four Model F SGs designated A through D at Wolf Creek were designed by Westinghouse.
Each SG contains 5,626 thermally treated Alloy 600 tubes. Each tube has a nominal outside diameter of 0.688 inches and a nominal wall thickness of 0.040 inches. The tubes are supported by stainless steel tube support plates (TSPs) with quatrefoil-shaped holes and V-shaped chrome-plated Alloy 600 anti-vibration bars (AVBs). The tubes are hydraulically expanded for the full depth of the tubesheet at each end. The most recent previous SG inspections were performed during RFO 22.
Information provided by the licensee during the April 16, 2021, conference call is summarized below:
No primary-to-secondary leakage was observed during the two preceding operating cycles.
Secondary-side pressure tests were not performed during the outage.
No exceptions were taken to the industry guidelines.
Eddy current tube inspections were performed in all four SGs. The inspection scope for each SG included a full-length bobbin probe inspection of all in-service tubes, except for the U-bend section in Rows 1 and 2, which were inspected with a +Point' rotating probe in 50 percent of the tubes.
A variety of eddy current tube inspections were performed in all four SGs using +Point' and array probes, including array probe inspection from 3 inches above the top of the tubesheet to 15.21 inches below the top of the tubesheet on the hot leg (HL) in every in-service tube, array probe inspection of 100 percent of the periphery tubes two pitches deep on the cold leg (CL), and confirmation with +Point' probes of bobbin probe special interest or I-codes.
The licensee described how recent detection of stress corrosion cracking in Seabrook Station (Agencywide Documents Access and Management System (ADAMS) Accession No. ML20295A551) and Catawba Nuclear Station, Unit 2 (ADAMS Accession No. ML19353A416) SG tubes were incorporated into the Wolf Creek inspections. In addition to a review of the industry documentation of the experience at both plants, analyst training and performance demonstration used actual inspection data from Seabrook Station, Enclosure 1
which has the same model of SGs as Wolf Creek. Inspections with +Point' probes were performed on all dents and dings greater than 5 volts (bobbin probe) at the top TSP on both the HL and CL, 50 percent of other dents and dings in the HL and U-bend region, 25 percent of other dents and dings in the CL region, all periphery tubes at the other CL TSPs, and a 25 percent sample of dents and dings between 2 and 5 volts (bobbin probe). Baseline inspection years of 1996 (SGs A and D) and 1997 (SGs B and C) were established using an automatic history trending database.
The licensee reported the following eddy current indications at the time of the call:
o 4,052 AVB wear indications in 1,770 tubes. The maximum depth was 46 percent through-wall, and the growth rate for the two operating cycles since the previous inspection was 2-3 percent through-wall per effective full power year (EFPY), which was slightly lower than the historical rate of 3-4 percent through-wall per EFPY (0.95 probability in both cases).
o New foreign object wear indications in two tubes, one each in SG A and SG B. Both indications were located just below the second HL TSP and were less than 40 percent through-wall in depth. No foreign objects were present at the locations of the wear, and eddy current inspection of the surrounding tubes had not yet been completed.
o Historical wear indications at TSPs from foreign objects and pressure pulse cleaning had not yet been inspected at the time of the call.
No cracking had been detected at the time of the call.
At the time of the call, the licensee planned to plug 30 tubes, all due to AVB wear (5 in SG A, 12 in SG B, 3 in SG C, and 10 in SG D.)
No in situ pressure tests or tube pulls were planned for the outage.
Primary-side inspection included visual inspection of tube plugs and surfaces in the channel head. One cladding anomaly first observed in RFO 19 had not changed according to the visual inspection and ultrasonic thickness testing performed during this outage.
Secondary-side cleaning and inspections were being performed in all four SGs and included sludge lancing (SL), post-SL visual inspection in the tube bundle and of the material collected in the SL grit tank screens, foreign object search and retrieval (FOSAR), a combination of visual and ultrasonic thickness testing of the upper steam drum, feedring and feedring j-nozzles.
At the time of the call, SL was complete in SG A and SG D, and underway in SG B and SG C. Approximately 22 and 40 pounds of material, respectively, had been collected from SG A and SG D. FOSAR resulted in identification of 10 foreign objects in SGs A and D, all of which were small (wire bristles and machining remnants), and 4 of which were retrieved.
The six objects not retrieved were being evaluated as part of condition monitoring and operational assessment.
No secondary-side deposit assessment, scale profiling, or chemical cleaning was being performed during this outage. All four SGs have had multiple full-bundle chemical cleanings, and the most recent was a full-bundle advanced scale conditioning agent application in all four SGs during RFO 21.
The estimated completion date of the SG inspections was April 20, 2021.
LIST OF PARTICIPANTS APRIL 16, 2021, CONFERENCE CALL REGARDING SPRING 2021 STEAM GENERATOR TUBE INSPECTIONS AT WOLF CREEK GENERATING STATION DOCKET NO. 50-482 U.S Nuclear Regulatory Commission Steve Bloom Andrew Johnson Paul Klein Greg Makar Leslie Terry Nick Taylor (Region IV)
Wolf Creek:
Josh Turner - Manager of Licensing Jason Knust - Licensing Engineer Pat Wagner - Steam Generator Program Engineer Westinghouse Ed Kurdziel Kevin Smouse Jay Smith Ed Ericson Anatech Neil Farenbaugh Dave Darst Enclosure 2
ML21127A132 OFFICE NRR/DORL/LPL4/PM NRR/DORL/LPL4/PMit NRR/DORL/LPL4/LA NAME SLee BJain PBlechman DATE 5/7/2021 5/7/2021 5/10/2021 OFFICE NRR/DNRL/NCSG/BC NRR/DORL/LPL4/BC NRR/DORL/LPL4/PM NAME SBloom JDixon-Herrity SLee DATE 5/7/2021 5/11/2021 5/11/2021