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MONTHYEARML0224200762002-08-29029 August 2002 Upcoming Steam Generator Tube Inservice Inspection (Tac No. MB6183) Project stage: Other ML0515802652002-10-11011 October 2002 Summary of Conference Calls with Northeast Utilities Regarding the 2002 Steam Generator Inspection Results at Millstone Unit 3 Project stage: Other ML0231105282002-11-0808 November 2002 Summary of Conference Calls with Dominion Nuclear Connecticut, Inc., Regarding the 2002 Steam Generator Inspection Results at Millstone Power Station, Unit No. 3 Project stage: Other 2002-11-08
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Category:Meeting Summary
MONTHYEARML23297A2312023-10-24024 October 2023 E-mail to File - Summary of September 13, 2023, Meeting with Dominion to Discuss Proposed LAR to Support Cycle Reloads Using Framatome Gaia Fuel ML23080A1902023-03-21021 March 2023 Annual Assessment Meeting for Millstone Power Station - Meeting Summary ML22272A0332022-09-29029 September 2022 Memo E-mail to File - Summary of August 29, 2022, Meeting with Dominion to Discuss Proposed Alternative Request Post-peening follow-up Volumetric Exam of RPV Head Penetration Nozzle ML22252A1772022-09-0909 September 2022 Memo E-mail to File - Summary of August 9, 2022, Meeting with Dominion to Discuss Proposed Alternative Reqeust Recirculation Spray Pump Flow Testing (EPID L:2022-LRM-0057) ML22130A1702022-05-20020 May 2022 Summary of April 21, 2022, Public Meeting to Discuss Potential Emergency Preparedness License Amendment Request ML22131A0702022-05-12012 May 2022 Summary of Conference Call Regarding the Spring 2022 Steam Generator Tube Inspections ML22102A1642022-04-12012 April 2022 Annual Assessment Meeting for Millstone Power Station - Meeting Summary ML21091A0522021-04-0101 April 2021 3/18/21 - Annual Assessment Meeting for Millstone Power Station - Meeting Summary ML21027A0232021-01-28028 January 2021 Summary of January 26, 2021 Closed Meeting with Dominion Energy Regarding Performance of Force on Force Exercises in a Pandemic Environment ML20272A3112020-09-28028 September 2020 Memo E-mail to File - Summary of August 19, 2020, Meeting with Dominion to Discuss Proposed Exemption Request Biennial Emergency Preparedness Exercise Date Change ML20210M4232020-08-0505 August 2020 Summary of June 29, 2020, Pre-Submittal Teleconference with Dominion Energy Nuclear Connecticut, Inc. Proposed License Amendment Request for Measurement Uncertainty Recapture Power Uprate ML20176A5992020-06-29029 June 2020 Summary of May 26, 2020, Pre-Submittal Teleconference with Dominion Energy Nuclear Connecticut, Inc. Proposed Alternative Request for Steam Generator Weld Examinations ML20121A1082020-04-30030 April 2020 Annual Assessment Meeting for Millstone Power Station - Meeting Summary ML19194A0012019-07-12012 July 2019 Memo E-mail to File - Summary of June 3, 2019, Meeting with Dominion to Discuss Proposed License Amendment Request to Extend Integrated Leak Rate Test Interval ML19159A0012019-06-0707 June 2019 Memo E-mail to File - Summary of May 9, 2019, Meeting with Dominion to Discuss Proposed License Amendment Request Revised TS Limits for Coolant Activity ML19144A1292019-05-30030 May 2019 Summary of November 20, 2018, Pre Application Meeting with Dominion Energy Regarding the Planned License Amendment Request to Revise Emergency Action Levels ML19046A1502019-02-15015 February 2019 Memo E-mail to File - Summary of January 22, 2019, Meeting with Dominion to Discuss Proposed Alternative IR-3-39 Fillet Welds ML18341A0982018-12-0707 December 2018 Memo E-mail to File - Summary of November 8, 2018, Meeting with Dominion to Discuss Proposed LAR - 10 CFR 50.69 Risk-Informed Approach ML18113A2672018-04-25025 April 2018 Summary of Meeting with Dominion Energy Nuclear Connecticut, Inc. on Planned Relief Request Submittal Concerning the In-Service Testing of the C Charging Pump ML18101A0422018-04-10010 April 2018 Summary of Annual Assessment Meeting for Millstone Power Station Held on 4/4/18 ML17274A0002017-09-29029 September 2017 Memo E-mail to File - Summary of August 31, 2017, Meeting with Dominion to Discuss Proposed License Amendment, Revised Spent Fuel Pool Criticality Safety Analysis ML17227A0052017-08-15015 August 2017 Memo E-mail to File - Summary of July 18, 2017, Meeting with Dominion to Discuss Proposed License Amendment Request, TS 3.8.1.1, AC Sources Operating ML17096A4512017-04-0505 April 2017 3/22/2017 - Summary of Annual Assessment Meeting for Millstone Power Station ML16160A0282016-06-0808 June 2016 Teleconference Memo to File - Millstone Power Station, Unit 2, Summary of May 3, 2016 Pre-submittal Teleconference with Dominion Nuclear Connecticut ML16102A0732016-04-0808 April 2016 3/29/2016 Summary of Public Annual Assessment Meeting for Millstone Power Station ML16035A4802016-02-12012 February 2016 Jsc Meeting Summary Attachment ML16004A4732016-01-0404 January 2016 Teleconference Memo to File: Summary of December 17, 2015 - Pre-submittal Call with the NRC Related to Confirmatory Item IV.5 ML16004A4722016-01-0404 January 2016 Teleconference Memo to File: Summary of December 10, 2015 - Pre-submittal Call with the NRC Related to Confirmatory Item IV.2 ML15316A2522015-11-19019 November 2015 October 20, 2015, Millstone, Units 2 and 3, Surry, Units 1 and 2, North Anna, Units 1 and 2 - Summary of Pre-submittal Conference Call Regarding Emergency Action Level Scheme Changes ML15173A0002015-06-23023 June 2015 Summary of Conference Call Regarding the Fall 2014 Steam Generator Tube Inspections ML15162A8662015-06-16016 June 2015 Summary of May 21, 2015 Meeting with Dominion Nuclear Connecticut, Inc. to Discuss Pre-Submittal of License Amendment Request for Removal of Severe Line Outage Detection at Millstone Power Station ML15128A3872015-05-0808 May 2015 4/14/2015 Summary of Annual Assessment Meeting for Millstone Power Station ML14210A0212014-08-0808 August 2014 June 25, 2014, Summary of Category 1 Public Meeting with Dominion Nuclear to Discuss Seismic Hazard Reevaluations Associated with Implementation of Japan Lessons-Learned Near-Term Task Force Recommendation 2.1 ML14093A7182014-04-0303 April 2014 Summary of Annual Assessment Meeting for Millstone Power Station on 3/31/2014 ML14029A6532014-01-29029 January 2014 2013 Annual Summary of the Green Mountain Power Special Nuclear Committee ML13207A2592013-07-30030 July 2013 7/17/2013 - Summary of Meeting with Dominion Nuclear Connecticut, Inc. and Areva to Discuss Upgrade to Areva Standard CE14 Htp Fuel Assembly.7/17/2013 - Summary of Meeting with Dominion Nuclear Connecticut, Inc. and Areva to Discuss Upgrade ML13127A0832013-05-0707 May 2013 4/9/13 - Summary of Annual Assessment Meeting with Millstone Power Station ML12115A1072012-04-23023 April 2012 Summary of Public Meeting to Discuss Annual Assessment of Safety Performance at Milstone for 2011 ML12115A1162012-04-23023 April 2012 4/19/2012 - Millstone Power Station/Neac 2011 Annual Assessment Meeting Summary ML1205803622012-03-12012 March 2012 2/15/2012 - Summary of Pre-Application Meeting with Dominion Nuclear Connecticut, Inc., to Discuss a Proposed Millstone Power Station, Unit No. 2, License Amendment Request Concerning Spent Fuel Pool Criticality Re-Analysis ML11292A1612011-10-20020 October 2011 Summary of Meeting with Beyond Nuclear Regarding Their 10 CFR 2.206 Petition to Suspend Operating Licenses of General Electric Mark I Boiling Water Reactors ML1118806442011-07-0707 July 2011 Summary of the Millstone 2011 Annual Assessment Meeting with the Connecticut Nuclear Energy Advisory Council (Neac) ML1118805312011-07-0707 July 2011 Annual Assessment Meeting Summary ML11166A1342011-06-22022 June 2011 Meeting Summary with the Beyond Nuclear Petitioners Regarding Their 2.206 Petition to Suspend Operating Licenses (Ols) of General Electric (GE) Boiling Water Reactors (Bwrs) Mark I (Bwrs) ML1106907942011-05-10010 May 2011 Summary of Meeting with Dominion Nuclear Connecticut, Inc. Discussing Millstone Power Station, Units 2 and 3 Licensing Activities ML1034807622011-01-12012 January 2011 November 8, 2010 Summary of Teleconference W/ DNC to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information ML1022201102010-09-14014 September 2010 July 28, 2010, Summary of Teleconference with DNC to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information ML1020102612010-07-29029 July 2010 Summary of July 13, 2010, Meeting with DNC to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information ML1015906482010-06-30030 June 2010 Summary of Meeting with Dominion Nuclear Connecticut, Inc., (DNC) to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information ML1012506232010-05-24024 May 2010 Summary of Meeting with Dominion Nuclear Connecticut, Inc. (DNC) to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information 2023-03-21
[Table view] Category:Memoranda
MONTHYEARML22130A1702022-05-20020 May 2022 Summary of April 21, 2022, Public Meeting to Discuss Potential Emergency Preparedness License Amendment Request ML22028A3502022-01-21021 January 2022 Green Mountain Power, 2021 Annual Summary of Special Nuclear Committee ML21027A0232021-01-28028 January 2021 Summary of January 26, 2021 Closed Meeting with Dominion Energy Regarding Performance of Force on Force Exercises in a Pandemic Environment ML19165A1192019-06-14014 June 2019 Memoranda to File Environmental Assessment and Finding of No Significant Impact for the Virginia Electric and Power Company, Dominion Energy Kewaunee, Inc., and Dominion Nuclear Connecticut, Inc.'S Decommissioning Funding Plans Submitted ML17271A0532017-09-29029 September 2017 2017 Summary of Annual Decommissioning Funding Status Reports for Reactors in Decommissioning ML16088A2042016-03-28028 March 2016 Memo T Bowers from s Ruffin, Technical Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations W/ Encl 2 (Template) ML16088A2052016-03-28028 March 2016 Enclosure 1 - (72.30 DFP Reviews to Be Completed 2015) - Memo T Bowers from s Ruffin, Technial Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations ML15075A1922015-03-26026 March 2015 Reactor Coolant System Alloy 600 Inspection Program for License Renewal Commitment No. 14. (Tac No. MF3433) ML13031A1832013-02-0505 February 2013 Closed Meeting Announcement Millstone Drop-In ML13032A0572013-01-30030 January 2013 2012 Annual Summary of the Green Mountain Power Special Nuclear Committee ML12178A6132012-06-27027 June 2012 Notice of Forthcoming Pre-Application Meeting with Dominion Nuclear Connecticut, Inc. to Discuss a Proposed Millstone Power Station, Unit 2, License Amendment Request Concerning Spent Fuel Pool Criticality Re-Analysis ML13196A2202012-06-0606 June 2012 Memo from B. Balsam, NRR and D. Logan, NRR to J. Susco, NRR on Summary of Section 7 Consultation Activities Related to the National Marine Fisheries Service'S Final Rule to List the Atlantic Sturgeon ML11271A1782011-10-0303 October 2011 Review of Topical Report, Revision 11 for Kewaunee Power Station and ISFSI, Millstone Power Station, Units 1, 2, & 3 and ISFSI, North Anna Power Station, Units 1 & 2 and ISFSI, Surry Power Station, Units 1 & 2 and ISFSI (Tac ME6649, ME6650, ML11250A1712011-09-14014 September 2011 Notice of Forthcoming Meeting with Petitioner Requesting Action Under 10 CFR 2.206 Regarding Immediate Suspension of the Operating Licenses of General Electric (GE) Mark 1 Boiling Water Reactors (Bwrs) ML1116804602011-06-30030 June 2011 Review of Commitment Change Report for 2009 ML1103106822011-02-0101 February 2011 Revised Notice of Forthcoming Public Meeting with Dominion Nuclear Connecticut, Inc., to Discuss Millstone Power Station Licensing Activities ML1100701752011-01-11011 January 2011 Request for Technical Assistance on Request for Exemption Form Certain Requirements of 10 CFR 73.55 for Millstone Power Station, Unit 1 ML1035103202010-12-20020 December 2010 30-Day Report of Emergency Core Cooling System Model Change ML1033305502010-12-15015 December 2010 Potential Notice of Enforcement Discretion for the Turbine Driven Auxiliary Feedwater Pump ML1031202422010-11-0808 November 2010 Notice of Teleconference with Dominion Nuclear Connecticut, Inc. to Discuss Millstone Power Station, Unit No. 3 Generic Letter 2004-02 Supplemental Response ML1030100732010-10-28028 October 2010 Meeting Notice Milestone Power Station Revised 10 CFR 73.55 ML1019502842010-07-14014 July 2010 Notice of Forthcoming Public Teleconference with Dominion Nuclear Connecticut, Inc. to Discuss Millstone Power Station, Unit No. 3 Generic Letter 2004-02 Supplemental Response ML1008204222010-03-26026 March 2010 Notice of Conference Call with Dominion Nuclear Connecticut, Inc. to Discuss Millstone Power Station, Unit Nos 2 and 3 Generic Letter 2004-02 Supplemental Responses ML1003314992010-03-0101 March 2010 Notice of Conference Call with Dominion Nuclear Connecticut, Inc., to Discuss Millstone Power Station, Unit Nos. 2 and 3 Generic Letter 2004-02 Supplemental Responses ML0931406252009-11-17017 November 2009 Summary of Teleconference Verbal Authorization for Relief Request RR-89-67 ML0913401332009-05-15015 May 2009 Notice of Forthcoming Meeting with Dominion Nuclear Connecticut, Inc. to Discuss the Submittal of a License Amendment Request Regarding the Removal of Charging Pumps from the Technical Specifications for Millstone Power Station, Unit No. 2 ML0906205722009-03-0303 March 2009 Meeting Minutes of the Power Uprates Subcommittee, July 8, 2008 ML0811500912008-04-23023 April 2008 Proposed Stretch Power Uprate to Millstone Power Station, Unit 3 ML0807400842008-03-14014 March 2008 Draft Regulatory Guide for Comment ML0734708412007-12-11011 December 2007 Drop-In Visit from Dominion (Millstone) ML0730304052007-10-31031 October 2007 E. Marinos Memo Technical Assistance Request-Dominion Resources, Inc.'S December 6, 2006, Request for Exemption from 10 CFR 74.13(a) Requirements Regarding Material Status Report Submittal Time Frame ML0715100542007-05-31031 May 2007 Closeout of TAC Numbers for Licensing Activities That Do Not Require Staff Review ML0710201942007-04-24024 April 2007 Draft Open Items from Staff Audit of Corrective Actions to Address Generic Letter 2004-02 ML0707902492007-03-20020 March 2007 Facsimile Transmission, Draft Request for Additional Information Regarding Steam Generator Tube Integrity ML0634902692007-01-11011 January 2007 Memo: K. Mcconnell to M. Lesar - Notice of Environmental Assessment and Finding of No Significant Impact Related to Partial Exemption from 10 CFR Part 50, Recordkeeping Requirements - Millstone Power Station, Unit 1 ML0633901162006-12-19019 December 2006 Fax - Draft Request for Additional Information Regarding Post-Maintenance/Modification Surveillance Requirements ML0630701472006-12-12012 December 2006 Facsimile Transmission, Draft Request for Additional Information ML0631101502006-11-13013 November 2006 Request for Additional Information Regarding Human Factors - Millstone, Unit 2, Alternate Source Term License Amendment Request ML0626800242006-10-0202 October 2006 Transfer of Project Management Responsibilities ML0625100662006-09-29029 September 2006 Facsimile Transmission, Draft Request for Additional Information Regarding Extension of Integrated Leakage Rate Test Interval ML0619500042006-07-14014 July 2006 Facsimile Transmission, Draft Request for Additional Information Regarding Post Maintenance/Modification Surveillance Requirements ML0619500092006-07-14014 July 2006 Facsimile Transmission, Draft Request for Additional Information Regarding Relaxation Request IR-2-46, Reactor Pressure Vessel Head Inspections ML0617805592006-07-10010 July 2006 Revised Closeout Letter for Bulletin 2003-01, Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reactors. ML0617701952006-06-26026 June 2006 Closeout of Tac Number for Licensing Activities Incorrectly Identified for Staff Review ML0606702532006-03-24024 March 2006 Facsimile Transmission, Draft Request for Additional Information to Be Discussed in an Upcoming Conference Call ML0608601632006-03-21021 March 2006 Handouts to Applicants (Folder 3) ML0604005082006-03-0202 March 2006 Facsimile Transmission, Draft Request for Additional Information to Be Discussed in an Upcoming Conference Call ML0602700882006-01-31031 January 2006 Facsimile Transmission Draft Request for Additional Information to Be Discussed in an Upcoming Conference Call (Tac No. MC8327) ML0602502612006-01-26026 January 2006 Facsimile Transmission, Draft Request for Additional Information to Be Discussed in an Upcoming Conference Call ML0528500672005-10-25025 October 2005 Facsimile Transmission RAI to Be Discussed in an Upcoming Conference Call 2022-05-20
[Table view] Category:Note to File incl Telcon Record
MONTHYEARML0931406252009-11-17017 November 2009 Summary of Teleconference Verbal Authorization for Relief Request RR-89-67 ML0513802722005-05-17017 May 2005 Summary of Telephone Conference Millstone Power Station, Units 1 and 2, Draft Supplemental Environmental Impact Statement Conducted on April 5, 2005 with Environmental Protection Agency, Region 1... ML0514505242005-04-17017 April 2005 Handwritten Notes Re Millstone Unit 3 ML0515802652002-10-11011 October 2002 Summary of Conference Calls with Northeast Utilities Regarding the 2002 Steam Generator Inspection Results at Millstone Unit 3 2009-11-17
[Table view] Category:Verbal Comm
MONTHYEARML0931406252009-11-17017 November 2009 Summary of Teleconference Verbal Authorization for Relief Request RR-89-67 ML0513802722005-05-17017 May 2005 Summary of Telephone Conference Millstone Power Station, Units 1 and 2, Draft Supplemental Environmental Impact Statement Conducted on April 5, 2005 with Environmental Protection Agency, Region 1... ML0514505242005-04-17017 April 2005 Handwritten Notes Re Millstone Unit 3 ML0515802652002-10-11011 October 2002 Summary of Conference Calls with Northeast Utilities Regarding the 2002 Steam Generator Inspection Results at Millstone Unit 3 2009-11-17
[Table view] |
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October 11, 2002 MEMORANDUM TO: James Clifford, Chief Project Directorate Section 1-1 Division of Licensing Project Management FROM: A. Louise Lund, Chief IRA Cheryl Khan for!
Component Integrity and Chemical Engineering Section Materials and Chemical Engineering Branch Division of Engineering
SUBJECT:
SUMMARY
OF CONFERENCE CALLS WITH NORTHEAST UTILITIES REGARDING THE 2002 STEAM GENERATOR INSPECTION RESULTS AT MILLSTONE UNIT 3 (TAC NO.: MB6183)
On September 18, 2002, the staff of the Materials and Chemical Engineering Branch, Division of Engineering, Nuclear Reactor Regulation, participated in a conference call with Northeast Utilities representatives regarding the ongoing steam generator tube inspection activities at Millstone Unit 3. Attached is a brief summary of the conference call. We ask that you make the summary publicly available. Please include myself, Bart Fu, Cheryl Khan, and David Lew on distribution for the final document. If you elect to change the attached summary, prior to sending to the licensee, please include me on concurrence. Upon issuance of the attached summary this TAC can be closed.
EMCB formally reviews all steam generator inspection summary reports submitted by licensees in accordance with the plant's technical specification requirements. The licensee's typically submit these summary reports within one year of the completion of the steam generator inspections. Therefore, please provide this report and a work request to me when it is submitted. The TAC number for this effort should be opened as a non fee-billable Other Licensing Task (OLT). The process for handling our review of steam generator inspection summary reports as well as the steam generator conference calls is outlined in the September 30, 2002 memo from Richard J. Barrett and John A. Zwolinski to Brian W. Sheron (ML022740514).
We appreciate your support in this matter.
Attachment:
As stated CONTACT: Z. Bart Fu, EMCB/DE 301-415-2467
'iI
MEMORANDUM TO: James Clifford, Chief Project Directorate Section 1-1 Division of Licensing Project Management FROM: A. Louise Lund, Chief Component Integrity and Chemical Engineering Section Materials and Chemical Engineering Branch Division of Engineering
SUBJECT:
SUMMARY
OF CONFERENCE CALLS WITH NORTHEAST UTILITIES REGARDING THE 2002 STEAM GENERATOR INSPECTION RESULTS AT MILLSTONE UNIT 3 (TAC NO.: MB6183)
On September 18, 2002, the staff of the Materials and Chemical Engineering Branch, Division of Engineering, Nuclear Reactor Regulation, participated in a conference call with Northeast Utilities representatives regarding the ongoing steam generator tube inspection activities at Millstone Unit 3. Attached is a brief summary of the conference call. We ask that you make the summary publicly available. Please include myself, Bart Fu, Cheryl Khan, and David Lew on distribution for the final document. If you elect to change the attached summary, prior to sending to the licensee, please include me on concurrence. Upon issuance of the attached summary this TAC can be closed.
EMCB formally reviews all steam generator inspection summary reports submitted by licensees in accordance with the plant's technical specification requirements. The licensee's typically submit these summary reports within one year of the completion of the steam generator inspections. Therefore, please provide this report and a work request to me when it is submitted. The TAC number for this effort should be opened as a non fee-billable Other Licensing Task (OLT). The process for handling our review of steam generator inspection summary reports as well as the steam generator conference calls is outlined in the September 30, 2002 memo from Richard J. Barrett and John A. Zwolinski to Brian W. Sheron (ML022740514).
We appreciate your support in this matter.
Attachment:
As stated CONTACT: Z. Bart Fu, EMCB/DE 301-415-2467 Distribution: EMCB RF CKhan MModes KKarwoski VNerses LLund YDiaz DLew EMurphy JTsao CLauron ML022880611 OFFICE EMCB:DE I E EMCB:DE l NAME ZB Fu:zbf LLund:AII DATE 10/11/02 10/11/02 OFFICIAL RECORD COPY
SUMMARY
OF CONFERENCE CALLS WITH NORTHEAST UTILITIES REGARDING THE SEPTEMBER 2002 STEAM GENERATOR INSPECTION RESULTS AT MILLSTONE UNIT 3 The NRC staff participated in a conference call on September 18, 2002 with Northeast Utilities representatives regarding the ongoing steam generator (SG) tube inspection activities at Millstone Unit 3. Topics discussed during the conference call consisted of: background, initial eddy current testing scope, scope expansion plans, indications identified to-date, repair/plugging plans, new degradation findings, condition monitoring and operational assessment. At the time of the call, the licensee was approximately 76% complete with their inspections in SG A and 87% complete in SG C.
Background
Millstone Unit 3 is a four-loop Westinghouse pressurized water reactor with four Westinghouse Model F recirculating steam generators (A, B, C, D) with thermally treated Alloy 600 tubes, which are nominally 0.750 inch in diameter and have a nominal wall thickness of 0.043 inches.
The tubes are hydraulically expanded for the full depth of the tubesheet at each end. The tubes are supported by a number of stainless steel tube support plates with quatrefoil shaped holes and V-shaped chrome plated Alloy 600 anti-vibration bars (AVBs). Prior to installation, the tubes in Rows 1 through 10 were treated in a furnace in order to relieve the stresses from bending the tubes.
Two modes of degradation have historically been observed in the Millstone Unit 3 steam generators: wear at the AVBs and wear from foreign objects.
Inspection Scope During the September 2002 inspection, the licensee was using analysts and techniques qualified in accordance with the Electric Power Research Institute's (EPRI's) "PWR Steam Generator Examination Guidelines." Personnel were qualified to Appendix G of these guidelines and techniques were qualified to Appendix H.
The licensee planned to perform the following inspections in two of the four steam generators during the outage - SG A and SG C:
Full length bobbin examination of 100% of the inservice tubes.
Rotating probe (equipped with a plus-point coil) examination of 50% of the tubes from 3-inches above to 3-inches below the top of the hot-leg tubesheet. This examination would include the expansion transition.
ATTACHMENT
Rotating probe (equipped with a plus-point coil) examination of the U-bend region of 50% of the tubes in Rows 1 and 2.
Rotating probe (equipped with a plus-point coil) examination of all the dents/dings on the hot-leg side of the steam generator which have bobbin voltages greater than 3 volts.
Rotating probe (equipped with a plus-point coil) examination of all indication calls from bobbin probe inspection.
Visual examination of all tube plugs.
On the secondary side of the steam generator, the licensee planned to perform sludge lancing and foreign object search and retrieval (FOSAR) in each of the four steam generators.
Inspection Results As indicated above, the inspections were approximately 76% complete in SG A and 87%
complete in SG C on the day of the call. Based on the inspections performed, the following results were provided:
Wear at the AVBs The licensee stated they plug all AVB wear greater than or equal to 37% through-wall (TW),
and had detected 7 pluggable indications a the time of the call. The licensee detected 2 wear indications greater than or equal to 40% TW in SG A. One indication was detected greater than or equal to 40% TW in SG C. The maximum depth was 45% TW. Four indications were detected between 37% TW and 40% TW.
The licensee stated that the AVB wear growth rate is very low. Specifically, for flaws greater than or equal to 37% TW in all steam generators, the average growth rate is 6.5% TW per 2 cycles and the maximum rate is 10% TW per 2 cycles. For SG A, considering AVB flaws of all depths, the average growth rate is 1.3% TW in 2 cycles and the maximum rate is 13% TW in 2 cycles. The licensee stated that the calculated growth rate for SG C is even lower.
Wear from foreign obiects:
The licensee detected a total of 7 possible loose part (PLPs) through eddy current testing most of which were located up to 4 inches above the tubesheet. One of these was located in a tube in SG A and 6 were located in tubes in SG C. The licensee planned to attempt to retrieve all loose parts.
One single volumetric indication (SVI) ) was detected in SG A and 4 were detected in SG C.
The licensee attributed these indications to wear due to loose parts. There was some correlation between the PLPs and the SVIs. The licensee stated that during this outage a new qualified sizing technique was used to depth size wear flaws caused by loose parts and that they intended to make plugging decisions based on the depth of the flaws.
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Tube Repairs The licensee plans to repair all tubes with AVB wear indications greater than or equal to 37%
TW, all tubes with wear indications due to loose parts greater than 40% TW, and all tubes with cracks (if any are identified). Thermally treated Alloy 690 mechanical tube plugs will be used.
For tubes with loose part wear indications less than 40%TW, the licensee does not plan to plug the tube if there is an associated loose part that can be removed. The bases for this approach is that 1) the flaw can be accurately depth sized; and 2) there would not be a driving force to further propagate the flaw. If a loose part can not be retrieved the licensee will perform an engineering evaluation to determine whether to plug the surrounding tubes.
Other No new degradation mechanisms were identified to-date. The licensee was cognizant of the cracking indications identified at Seabrook and included the eddy current data from these indications in their site specific performance demonstration to train the eddy current analysts.
Ultrasonic testing was not planned for this outage, and based on the results to-date in-situ pressure testing and tube pulls were not needed. The licensee plans to follow industry guidelines to determine whether indications require an in-situ pressure test.
Based on the results to-date, the licensee indicated all tubes meet the structural and leakage integrity criteria and are projected to meet these criteria for the next two cycles (i.e., the next time the licensee plans to inspect SGs A and C).
NRC Observations The NRC did not identify any issues with the scope or results of the examinations as a result of the information provided during the call. The NRC asked to be informed if any unusual findings (e.g., new degradation mechanisms, results not consistent with the above) were identified during the remainder of the inspections.
Additional Information Following the completion of the conference call on September 18, the licensee updated the staff with respect to the SG inspection findings. They indicated that additional SVIs were identified, two of which exceeded a depth of 40%TW and would be plugged. The licensee concluded that these indications did not challenge the structural and leakage integrity performance criteria. Although the deepest SVI was identified with the bobbin probe, the majority of the SVIs were small and only detectible with a rotating probe. Therefore, the licensee decided to expand the scope of their SG tube inspections with a rotating probe in the region near the top of the tubesheet. They decided to inspect an additional 20% of the tubes on both the hot and cold leg side since wear due to loose parts is equally as likely to occur on the cold leg side as the hot leg side.
The NRC did not identify any issues with the expanded scope or results of the examinations and determined that additional follow-up was not necessary.
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