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MONTHYEARML21308A0712021-11-0909 November 2021 Summary of Teleconference with Energy Harbor Nuclear Corp. Regarding Fall 2021 Steam Generator Inspections at Beaver Valley Power Station, Unit 2 Project stage: Meeting 2021-11-09
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Category:Letter
MONTHYEARML24025A0922024-01-25025 January 2024 Requalification Program Inspection L-23-267, Submittal of Discharge Monitoring Report (Npdes), Permit No. PA00256152023-12-18018 December 2023 Submittal of Discharge Monitoring Report (Npdes), Permit No. PA0025615 IR 05000334/20230112023-12-0404 December 2023 Age-Related Degradation Inspection Report 05000334/2023011 and 05000412/2023011 L-23-229, Request for Additional Information Regarding the Spring 2023 Generic Letter 95-05 Voltage-Based Alternate Repair Criteria and Steam Generator F-Star Reports2023-11-29029 November 2023 Request for Additional Information Regarding the Spring 2023 Generic Letter 95-05 Voltage-Based Alternate Repair Criteria and Steam Generator F-Star Reports IR 05000334/20233012023-11-27027 November 2023 Initial Operator Licensing Examination Report 05000334/2023301 L-23-247, Discharge Monitoring Report (NPDES) Permit No. PA00256152023-11-17017 November 2023 Discharge Monitoring Report (NPDES) Permit No. PA0025615 IR 05000334/20230032023-11-0606 November 2023 Integrated Inspection Report 05000334/2023003 and 05000412/2023003 L-23-227, Discharge Monitoring Report (NPDES) Permit No. PA0025615 for Third Quarter 20232023-10-20020 October 2023 Discharge Monitoring Report (NPDES) Permit No. PA0025615 for Third Quarter 2023 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) ML23198A3592023-10-0202 October 2023 Issuance of Amendment Nos. 322 and 212 Analytical Methodology to the Core Operating Limits Report for a Full Spectrum Loss of Coolant Accident (EPID L-2022-LLA-0129) - Nonproprietary IR 05000334/20234022023-09-29029 September 2023 Security Baseline Inspection Report 05000334/2023402 and 05000412/2023402 (Cover Letter Only) ML23237B4222023-09-28028 September 2023 Energy Harbor Nuclear Corp. - Vistra Operations Company LLC - Letter Regarding Order Approving Transfer of Licenses and Draft Conforming License Amendments ML23269A1242023-09-27027 September 2023 Request for Withholding Information from Public Disclosure IR 05000334/20234012023-09-21021 September 2023 Cybersecurity Inspection Report 05000334/2023401 and 05000412/2023401 (Cover Letter Only) ML23263A0192023-09-20020 September 2023 Operator Licensing Examination Approval ML23243A9272023-09-19019 September 2023 Review of the Fall 2022 Steam Generator Tube Inspection Report ML23249A1842023-09-18018 September 2023 Authorization and Safety Evaluation for Alternative Request No. 2-TYP-4-RV-06 L-23-208, Submittal of Discharge Monitoring Report Cnpdes), Permit No. PA00256152023-09-14014 September 2023 Submittal of Discharge Monitoring Report Cnpdes), Permit No. PA0025615 L-23-167, Twenty-Third Refueling Outage Inservice Inspection Summary Report2023-09-13013 September 2023 Twenty-Third Refueling Outage Inservice Inspection Summary Report 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 IR 05000334/20230052023-08-31031 August 2023 Updated Inspection Plan for Beaver Valley Power Station Units 1 and 2 (Report 05000334/2023005 and 05000412/2023005) L-23-172, Quality Assurance Program Manual2023-08-31031 August 2023 Quality Assurance Program Manual ML23129A1722023-08-25025 August 2023 Request for Withholding Information from Public Disclosure for Beaver Valley Power Station, Units 1 and 2; Davis Besse Nuclear Power Station, Unit 1; and Perry Nuclear Power Plant, Unit 1 IR 05000334/20230022023-08-0909 August 2023 Integrated Inspection Report 05000334/2023002 and 05000412/2023002 ML23219A0592023-08-0707 August 2023 Steam Generator Inspection Reports - Spring 2023 Spring Refueling Outrage 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-23-179, Submittal of Discharge Monitoring Report, (NPDES) Permit No. PA00256152023-07-18018 July 2023 Submittal of Discharge Monitoring Report, (NPDES) Permit No. PA0025615 ML23188A0982023-07-17017 July 2023 Correction to the Safety Evaluation Issued Related to Amendment Nos. 321 and 211 Consolidate Fuel Decay Time Technical Specifications in a New Limiting Condition for Operation Titled Decay Time ML23188A0672023-07-10010 July 2023 Project Manager Assignment L-23-165, Discharge Monitoring Report (NPDES) Permit No. PA00256152023-06-26026 June 2023 Discharge Monitoring Report (NPDES) Permit No. PA0025615 L-23-139, Response to Request for Additional Information Regarding Fall 2022 180-Day Steam Generator Tube Inspection Report2023-06-13013 June 2023 Response to Request for Additional Information Regarding Fall 2022 180-Day Steam Generator Tube Inspection Report ML23157A1072023-06-0707 June 2023 Request for Information and Notification of Conduct of IP 71111.21.N.04, Age-Related Degradation, Reference Inspection Report 05000334/2023011 and 05000412/2023011 ML23143A0272023-05-23023 May 2023 Licensed Operator Positive Fitness-For-Duty Test L-23-055, Submittal of the Updated Final Safety Analysis Report, Revision 342023-05-23023 May 2023 Submittal of the Updated Final Safety Analysis Report, Revision 34 ML23102A1472023-05-22022 May 2023 Issuance of Amendment Nos. 321 and 211 Consolidate Fuel Decay Time Technical Specifications in a New Limiting Condition for Operation Titled Decay Time L-23-065, Annual Financial Report2023-05-22022 May 2023 Annual Financial Report ML23135A7872023-05-19019 May 2023 Summary of Conference Calls Regarding the Spring 2023 Steam Generator Tube Inspections L-23-137, Discharge Monitoring Report (NPDES) Permit No. PA00256152023-05-18018 May 2023 Discharge Monitoring Report (NPDES) Permit No. PA0025615 ML23124A1742023-05-17017 May 2023 Energy Harbor Fleet Vistra License Transfer - Request for Withholding Information from Public Disclosure for Commance Peak Plant, Units 1 & 2, Beaver Valley Station, Units 1 & 2, Davis Besse Station, Unit 1 and Perry Plant, Unit 1 L-23-125, Cycle 24 Core Operating Limits Report2023-05-17017 May 2023 Cycle 24 Core Operating Limits Report ML23124A3882023-05-16016 May 2023 Summary of Regulatory Audit in Support of License Amendment Request to Revise Technical Specification 5.6.3, Core Operating Limits Reports (COLR) and TS 4.2.1 Fuel Assemblies ML23129A0112023-05-16016 May 2023 Notice of Consideration of Approval of Indirect and Direct License Transfer for Comanche Peak Plant, Units 1 & 2, Beaver Valley Station, Units 1 & 2, Davis Besse Station, Unit 1 and Perry Plant, Unit 1 (EPID L-2023-LLM-0000) (Letter) L-23-132, Response to NRC Regulatory Issue Summary 2023-01 Preparation and Scheduling of Operator Licensing Examinations2023-05-10010 May 2023 Response to NRC Regulatory Issue Summary 2023-01 Preparation and Scheduling of Operator Licensing Examinations IR 05000334/20230012023-05-0808 May 2023 Integrated Inspection Report 05000334/2023001 and 05000412/2023001 L-23-129, Response to Request for Additional Information for 10 CFR 50.55a Request 2-TYP-4-RV-06 for Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations2023-05-0505 May 2023 Response to Request for Additional Information for 10 CFR 50.55a Request 2-TYP-4-RV-06 for Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations ML23118A3812023-04-28028 April 2023 10 CFR 50.55a Request 2-TYP-4-RV-06 for Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations L-23-115, Submittal of 2022 Annual Radioactive Effluent Release Report, 2022 Annual Radiological Environmental Operating Report, and 2022 Annual Environmental Operating Report (Non-Radiological2023-04-27027 April 2023 Submittal of 2022 Annual Radioactive Effluent Release Report, 2022 Annual Radiological Environmental Operating Report, and 2022 Annual Environmental Operating Report (Non-Radiological L-23-126, Discharge Monitoring Report (Npdes), Permit No. PA00256152023-04-22022 April 2023 Discharge Monitoring Report (Npdes), Permit No. PA0025615 CP-202300181, ISFSI, Beaver Valley, Units 1 and 2, ISFSI, Davis-Besse, Unit 1, ISFSI, Perry, Unit 1, ISFSI, Corrected Affidavit for Application for Order Consenting to Transfer of Licenses and Conforming License Amendments2023-04-20020 April 2023 ISFSI, Beaver Valley, Units 1 and 2, ISFSI, Davis-Besse, Unit 1, ISFSI, Perry, Unit 1, ISFSI, Corrected Affidavit for Application for Order Consenting to Transfer of Licenses and Conforming License Amendments ML23107A2502023-04-18018 April 2023 Requalification Program Inspection 2024-01-25
[Table view] Category:Meeting Summary
MONTHYEARML23179A0012023-06-28028 June 2023 6/7/2023 - Annual Assessment Meeting for Pa/Md/Ny/Nj Nuclear Power Plants - Meeting Summary ML23135A7872023-05-19019 May 2023 Summary of Conference Calls Regarding the Spring 2023 Steam Generator Tube Inspections ML23026A3552023-01-31031 January 2023 Summary of Public Meeting with Energy Harbor Nuclear Corp. Regarding Beaver Valley Power Station License Amendment Request to Consolidate Fuel Decay Time TS Into New Limiting Condition for Operation ML22187A1462022-07-0606 July 2022 Joint Annual Assessment Meeting for Pa/Md/Nj/Ny Nuclear Power Plants - Meeting Summary ML22105A3932022-04-20020 April 2022 Summ. of March 17, 2022, Public Meeting with Ehnc Regarding Planned License Amendment Request to Consolidate Fuel Decay Time Requirements in a New Limiting Condition for Operation for Beaver Valley Power Station, Units 1 and 2 ML22053A2982022-02-25025 February 2022 Summary of the February 15, 2022, Meeting with Energy Harbor Nuclear Corp. Regarding the License Amendment Request Related to Revising TS 5.6.3 Core Operating Limits Report (COLR) ML21308A0712021-11-0909 November 2021 Summary of Teleconference with Energy Harbor Nuclear Corp. Regarding Fall 2021 Steam Generator Inspections at Beaver Valley Power Station, Unit 2 ML20197A2722020-07-15015 July 2020 2020 Beaver Valley, Calvert Cliffs, Limerick Peach Bottom, Susquehanna Annual Assessment Webinar Summary ML20148M3852020-06-0101 June 2020 Summary of May 26, 2020, Public Meeting with Energy Harbor Nuclear Corp. Potential License Amendment Request Related to Steam Generator Tube Sleeve Inspections and Maintenance ML20122A0032020-05-19019 May 2020 Summary of April 22, 2020, Teleconference with Energy Harbor Nuclear Corp. Regarding Spring 2020 Steam Generator Inspections at Beaver Valley Power Station, Unit 2 ML20111A0142020-04-27027 April 2020 Summary of March 31, 2020, Public Meeting with Energy Harbor Nuclear Corp. to Discuss COVID-19 Potential Submittals of Regulatory Actions ML19280A0382019-10-22022 October 2019 Ti 2515-191 Summary of Findings ML16125A5072019-10-22022 October 2019 Ti 191 Issue Matrix ML19191A1882019-07-0909 July 2019 Joint Annual Assessment Meeting (Webinar) for Pennsylvania Power Plants - Meeting Summary ML18325A0232018-11-28028 November 2018 Summary of Teleconference with Firstenergy Nuclear Operating Company Regarding Fall 2018 Steam Generator Inspections at Beaver Valley Power Station, Unit 2 ML18099A0812018-04-0606 April 2018 Bv Annual Assessment Meeting Summary and Attendance List 2018 ML17347A8082017-12-20020 December 2017 December 5, 2017, Summary of Public Meeting with Firstenergy Nuclear Operating Company to Discuss a Proposed License Amendment Request Extending Sleeve Life on the Steam Generator at Beaver Valley Power Station, Unit 2 ML17158B1662017-06-0909 June 2017 Summary of Meeting with Firstenergy Nuclear Operating Company Regarding the Spring 2017 Steam Generator Inspections at Beaver Valley Power Station, Unit 2 ML17082A1842017-03-28028 March 2017 March 20, 2017, Summary of Annual Assessment Meeting with Beaver Valley, Units 1 and 2 ML16250A5012016-10-0303 October 2016 Summary of August 30, 2016, Meeting with Firstenergy Nuclear Operating Company Regarding Planned Submittal of Emergency Action Level Scheme Change ML16105A0082016-04-25025 April 2016 March 30, 2016, Summary of Meeting with Firstenergy Nuclear Operating Company on Its Draft Probabilistic Risk Assessment RAI Related to Its License Amendment Request to Adopt NFPA Standard 805 ML16091A0702016-03-31031 March 2016 2016 Beaver Valley Annual Assessment Meeting Summary 2016 ML15320A3912015-11-24024 November 2015 Summary of Conference Call Regarding the Fall 2015 Steam Generator Inspections ML15225A4812015-08-14014 August 2015 July 23, 2015, Summary of Meeting with Representatives of the U.S. Army Corps, U.S. Nuclear Regulatory Commission and First Energy Nuclear Operating Co. to Discuss Flooding Analysis Associated with Beaver Valley Power Station ML15135A2982015-05-21021 May 2015 Summary of April 28, 2015, Meeting Between Representatives of the U.S. Army Corps of Engineers, Nuclear Regulatory Commission, and First Energy Nuclear Operating Co. to Discuss Flooding Analysis Associated with Beaver Valley Power Station, ML15104A6652015-04-14014 April 2015 April 9, 2015 Summary of Annual Assessment Meeting with Beaver Valley Power Station, Units 1 and 2 ML14325A7782014-12-16016 December 2014 October 6, 2014, Summary of Pre-Application Meeting with Firstenergy Nuclear Operating Company to Discuss Proposed Combination of Site Emergency Plans ML14184B1962014-08-14014 August 2014 Summary of June 18, 2014, Closed Meeting Between Representatives of the U.S. Army Corps of Engineers, Nuclear Regulatory Commission, and Firstenergy Nuclear Operating Co. to Discuss Flooding Analysis Associated with Beaver Valley Power Stat ML14160B1032014-07-10010 July 2014 June 6, 2014 Summary of Meeting with FENOC Flooding Hazard Reevaluation Extension Request for Beaver Valley Power Station, Units 1 and 2 and Flooding Hazard Reevaluation Report for Davis-Besse Nuclear Power Station, Unit 1 ML14142A0872014-06-0909 June 2014 Summary of Conference Call Regarding the Spring 2014 Steam Generator Inspections ML14099A1732014-04-0909 April 2014 Annual Assessment Meeting Summary, ROP14 ML13295A2182013-10-22022 October 2013 Summary of Public Meeting with Beaver Valley, ML13114A2072013-04-22022 April 2013 Summary of Annual Assessment Meeting at Beaver Valley ML13057A6782013-03-11011 March 2013 2/20/2013 - Summary of Meeting with Firstenergy Nuclear Operating Company to Discuss Proposed Request for Additional Information Response Regarding Beaver Valley Power Station End-of-Life Moderator Temperature Coefficient Testing ML12321A3012012-11-29029 November 2012 Summary of November 15, 2012, Meeting with Firstenergy Nuclear Operating Company to Discuss Upcoming License Amendment Request Relating to the Implementation of the Alternate Pressurized Thermal Shock Rule ML12310A0662012-11-13013 November 2012 Summary of Conference Call with Firstenergy Nuclear Operating Company to Discuss 2012 Steam Generator Tube Inspections ML12293A0402012-11-0101 November 2012 October 18, 2012 - Summary of Meeting with Firstenergy Nuclear Operating Company to Discuss Request for Additional Information Regarding Fenoc'S Extension Request for Upcoming Beaver Valley Power Station National Fire Protection Association ML12277A4082012-10-0303 October 2012 September 26, 2012, Summary of Public Meeting to Discuss FENOC Fleet Performance ML12223A4672012-08-22022 August 2012 August 1, 2012 - Summary of Meeting with FENOC to Discuss Upcoming National Fire Protection Association Standard 805 License Amendment Request Status ML12195A1132012-07-16016 July 2012 Summary of Public Meeting with FENOC Regarding Licensing Practices and Processes ML12104A1052012-04-13013 April 2012 Meeting Summary of Annual Assessment Meeting on March 22, 2012 ML1115805152011-06-15015 June 2011 (BVPS-2) - Summary of Conference Call Regarding the Spring 2011 Steam Generator Tube Inspection Results ML1112504622011-05-0505 May 2011 Summary of Annual Assessment Open House Public Meeting, Beaver Valley ML1035606612010-12-29029 December 2010 Summary of Beaver Valley Power Station, Unit 2 Public Conference Call Regarding Spent Fuel Pool Rerack LAR Draft RAI Responses Discussion ML1027903512010-10-18018 October 2010 Summary of Meeting with Firstenergy Nuclear Operating Company, on the Request for Additional Resposnses Regarding the Spent Fuel Rerack for Beaver Valley Power Station, Unit No. 2 ML1014105172010-05-21021 May 2010 Summary of the May 2010 Annual Assessment Open-House Public Meeting ML1013206652010-05-18018 May 2010 Summary of Category 1 Teleconference with Firstenergy Nuclear Operating Company to Discuss NRC Request for Additional Information Regarding Generic Letter 2004-02 ML1009502432010-04-0505 April 2010 Meeting Summary of 3-31-10 Public Meeting with FENOC ML0931407282009-11-18018 November 2009 Steam Generator Tube Inspections ML0909203872009-04-0202 April 2009 Summary of Annual Assessment Open-House Meeting Regarding the Safety Performance of the Beaver Valley Units 1 and 2 2023-06-28
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November 9, 2021 Mr. John J. Grabnar Site Vice President Energy Harbor Nuclear Corp.
Beaver Valley Power Station Mail Stop P-BV-SSB P.O. Box 4, Route 168 Shippingport, PA 15077-0004
SUBJECT:
SUMMARY
OF OCTOBER 22, 2021, TELECONFERENCE WITH ENERGY HARBOR NUCLEAR CORP. REGARDING FALL 2021 STEAM GENERATOR INSPECTIONS AT BEAVER VALLEY POWER STATION, UNIT 2 (EPID L-2021-LRO-0047)
Dear Grabnar:
On October 22, 2021, a teleconference was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of Energy Harbor Nuclear Corp. (the licensee) regarding the ongoing steam generator inspection activities at the Beaver Valley Power Station, Unit 2. The list of participants is provided as Enclosure 1 and the teleconference summary is provided as Enclosure 2.
Based on the information provided by the licensee, the NRC staff did not identify any issues that warranted immediate follow-up action. However, the NRC staff asked to be notified if any unusual conditions were detected during the remainder of the outage.
Please direct any inquiries to me at (301) 415-8004 or Sujata.Goetz@nrc.gov.
Sincerely,
/RA/
Sujata Goetz, Project Manager Plant Licensing Branch I Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-412
Enclosures:
- 1. List of Participants
- 2. Teleconference Summary cc: Listserv
LIST OF PARTICIPANTS OCTOBER 22, 2021, TELECONFERENCE WITH ENERGY HARBOR NUCLEAR CORP.
BEAVER VALLEY POWER STATION, UNIT 2 FALL 2021 STEAM GENERATOR INSPECTIONS Name Participant Paul Klein U.S. Nuclear Regulatory Commission (NRC)
Andrew Johnson NRC Steven Bloom NRC Sujata Goetz NRC Eve Elise NRC Phil Lashley (Licensing) Energy Harbor Nuclear Corp. (Energy Harbor)
Josh Goodman Energy Harbor Tim Saibena Energy Harbor Gary Alberti Energy Harbor Mark Manoleras Energy Harbor Kristy Gillespie Energy Harbor Jay Smith Energy Harbor Andrew Crotty Energy Harbor Pat Pauvlinch Energy Harbor Enclosure 1
SUMMARY
OF CONFERENCE CALL WITH ENERGY HARBOR NUCLEAR CORP.
BEAVER VALLEY POWER STATION, UNIT 2 FALL 2021 STEAM GENERATOR TUBE INSPECTIONS DOCKET NO. 50-412 On October 22, 2021, the staff of the Corrosion and Steam Generator Branch of the Division of New and Renewed Licenses, Office of Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission (NRC) participated in a conference call with Energy Harbor Nuclear Corp. (the licensee), regarding the ongoing steam generator (SG) tube inspection activities at Beaver Valley Power Station, Unit 2 (Beaver Valley, Unit 2) during Refueling Outage (RFO) 22.
Beaver Valley, Unit 2 is a three-loop plant with Westinghouse Model 51M SGs. Each SG contains 3,376 mill-annealed alloy 600 tubes with a nominal outside diameter of 0.875 inches and a nominal wall thickness of 0.050 inches. The tubes are supported by carbon steel tube support plates and alloy 600 anti-vibration bars. The tubes were roll expanded for the full depth of the tubesheet. The entire length of tube interior within the tubesheet was shot-peened on both the hot-leg and cold-leg side of the SG prior to operation. The U-bend region of the small radius tubes was in-situ stress-relieved prior to operation.
In addition to the depth-based tube repair criteria, the licensee is also authorized to apply the Generic Letter (GL) 95-05 voltage-based tube alternate repair criteria for predominantly axially-oriented outside diameter stress corrosion cracking (ODSCC) within the tube support plates (Agencywide Documents Access and Management System (ADAMS) Accession No. ML031070113). The licensee is also authorized to leave flaws within the tubesheet region in service, provided they satisfy the F* repair criterion (ADAMS Accession No. ML12143A445).
Highlights from the conference call are summarized below:
SG tube inspections were nearly complete at the time of the call. The inspection data was approximately 96 percent acquired and 93 percent analyzed. The overall inspection results were similar to the previous outage. There were no indications in the analyzed data that required in-situ pressure testing to demonstrate tube integrity.
A total of 162 indications of anti-vibration bars wear were reported in 88 tubes, with the majority in SG A and SG B. One SG B indication, sized at 41 percent through-wall (TW),
exceeded the Technical Specifications 40 percent TW repair limit.
At the time of the call, a total of 1,142 axial ODSCC indications (also called distorted support indications or DSIs) at tube support plates were evaluated using the GL 95-05 voltage-based alternate repair criteria. All of these indications were below the repair limits and the voltage distribution was bounded by previous inspection results. For comparison, a total of 1,292 DSIs were reported during RFO 21.
Enclosure 2
Other than the tube support plates locations, most stress corrosion cracking indications were detected at the hot-leg top-of-tubesheet expansion transition region, including:
o Ninety tubes (55 in SG A, 33 in SG B, and 2 in SG C) contained circumferential ODSCC indications. These indications had +PointTM voltages ranging from 0.06 volts to 0.30 volts, which met condition monitoring requirements and were below the initial screening criteria for in-situ pressure testing.
o Seven axial ODSCC cracks were detected at the top-of-tubesheet in five tubes.
The largest indication measured 0.19 volts and 50 percent TW using a +Point' probe.
o One indication of axial primary water stress corrosion cracking was detected.
This indication exceeded the initial voltage screening criteria for in-situ pressure testing but did not require testing due to a total crack length of 0.13 inches. This indication was depth profiled and had a structural effective depth of 89 percent TW and a structural effective length of 0.11 inches.
All previously installed tube sleeves were inspected with a combination +Point' and Ghent (Version 2) probe. The +Point' probe evaluates the region outside the nickel band region while the Ghent probe inspects the nickel band region. Circumferential indications were detected in two tubes at the lower sleeve roll-joint transition, below the nickel band. Due to the complexity of the eddy current signals, evaluation of the indications was still in progress at the time of the outage call. Preliminary analysis suggested the indications were in the parent tubes. Both sleeves were installed in RFO 20 in 2018. These tubes will be removed from service during this outage.
One indication of circumferential ODSCC was detected at a 7-volt ding in the tubing freespan. This indication was inspected as part of the 100 percent +Point' ding inspection program.
Cold-leg thinning was observed in one tube for the first time in the prior refueling outage (RFO 21). This tube was reinspected during this outage with no change in the 25 percent TW depth. A second tube with a cold-leg thinning indication was detected in the current outage with a 10 percent TW depth.
At the time of the call, 91 tubes were candidates for plugging or sleeving. The preliminary assessment was 75 tubes for repair by sleeving and 16 tubes for plugging.
In addition, outage schedule permitting, the licensee was planning to return some previously plugged tubes to service using the sleeve repair.
The NRC staff did not identify any issues that required follow-up action at the time of the call; however, the staff asked to be notified if any unusual conditions were detected during the remainder of the outage.
ML21308A071 *by memorandum OFFICE DORL/LPL1/PM DORL/LPL1/LA DNRL/NCSG/BC* DORL/LPL1/BC DORL/LPL1/PM NAME SGoetz KZeleznock SBloom JDanna SGoetz DATE 11/09/2021 11/09/2021 11/02/2021 11/09/2021 11/09/2021