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Category:Meeting Summary
MONTHYEARML19289D4842019-10-24024 October 2019
Summary for NEIMA-Kewaunee Meeting on 9/24/2019
ML16190A3452016-07-13013 July 2016
Inc. Pre-Submittal Meeting Regarding Load Drop Analysis for Spent Fuel Cask Handling Operations at Kewaunee Power Station (L53130)
ML15223B2832015-08-11011 August 2015
Summary of Public Meeting to Discuss NRC Activities at the Kewaunee Power Station
ML13205A0832013-07-24024 July 2013
Summary of Public Meeting to Discuss the 2012 Kewaunee Power Station End-of-Cycle Performance Assessment
ML12352A2822012-12-31031 December 2012
Summary of Meeting with Dominion Energy Kewaunee on Implementation of Orders Japan Lessons Learned Effort
ML12292A0942012-10-17017 October 2012
Summary of Public Meeting to Discuss the Prairie Island Nuclear Generating Plant, Unit 2 Steam Generators Replacement Activities
ML11173A2772011-06-22022 June 2011
Summary of the Public Meeting with Dominion Energy Kewaunee, Inc., to Discuss the Kewaunee Power Station End-Of-Cycle Performance Assessment for 2010
ML1024402012010-09-16016 September 2010
08/31/10 Summary of Telephone Conference Call Between Dominion Energy Kewaunee, Inc. and the U.S. Nuclear Regulatory Commission Concerning a Draft Request for Additional Information Pertaining to the Kewaunee Power Station License Renewal A
ML1023901982010-09-16016 September 2010
08/26/10 Summary of Telephone Conference Call Between Dominion Energy Kewaunee, Inc. and NRC Concerning a D-RAI Pertaining to the Kewaunee Power Station License Renewal Application
ML1014106432010-06-0909 June 2010
May 20, 2010 Summary of Meeting Regarding the Licensee'S Proposed Response to the Request for Additional Information on Generic Letter 2004-02
ML1012601102010-05-18018 May 2010
Summary of Public Meetings Conducted to Discuss the Draft Supplement Environmental Impact Statement Related to the Review of the Kewaunee Power Station License Renewal Application
ML1012600702010-05-0505 May 2010
Summary of Public Meeting to Discuss the 2009 Kewaunee End-Of-Cycle Performance Assessment
ML1007107412010-03-31031 March 2010
Summary of Telephone Conference Call Between Dominion Energy Kewaunee, Inc. and the NRC to Discuss Certain RAI Responses on Two Mechanical Systems
ML1001104472010-01-13013 January 2010
Summary of Telephone Conference Call with Dominion Energy Kewaunee, Inc., to Discuss Duplicate RAI Number
ML0932400382009-11-27027 November 2009
Summary of Conference Call with Dominion Energy Kewaunee, Inc., to Discuss Inaccessible Cables Program
ML0932302572009-11-27027 November 2009
Summary of Conference Call with Dominion Energy Kewaunee, Inc., to Discuss Program for Neutron Absorbing Material
ML0926008992009-09-28028 September 2009
(KPS) - Summary of 9/15/09 Meeting Regarding the Licensee'S Proposed Response to the Request for Additional Information on Generic Letter 2004-02
ML0921801372009-08-12012 August 2009
Summary Site Audit Related to the Review of the License Renewal Application for Kewaunee Power Station
ML0921006122009-08-10010 August 2009
07/28/2009 Summary of Public Meeting Related to the Review of the Kewaunee Power Station License Renewal Application
ML0918205652009-07-0808 July 2009
Summary of Conference Calls with Dominion Energy Kewaunee, Inc., to Discuss Response to Follow-Up Question Regarding Severe Accident Mitigation Alternatives Request for Additional Information for Kewaunee Power Station
ML0916904292009-06-17017 June 2009
Summary of Public Meeting with NRC and Members of the Kewaunee Power Station Emergency Preparedness Staff to Discuss the June 2009 Kewaunee Emergency Preparedness Exercise
ML0913300252009-05-21021 May 2009
Summary of Meeting with Kewaunee to Discuss a Future Amendment to Convert the Plant TS from Custom to Improved TS Format
ML0913403292009-05-14014 May 2009
Summary of Meeting Between NRC Region III Management and Dominion Energy Kewaunee, Inc. Representatives to Discuss the 2008 Kewaunee End-of-Cycle Performance Assessment
ML0900801102009-02-0505 February 2009
Summary of Meeting Between NRC Staff and Kewaunee to Discuss a Future Amendment to Convert Technical Specifications to the Improved Standard TS Format
ML0830904522008-11-17017 November 2008
10/22/08 Summary of Public License Renewal Overview and Environmental Scoping Meeting Related to the Review of the Kewaunee Power Station License Renewal Application
ML0815607282008-05-29029 May 2008
Ltr. 05/29/08 Kewaunee Re Non-Public Meeting Summary
ML0810202352008-04-11011 April 2008
Summary of Meeting Between NRC Region III Management and Dominion Energy Kewaunee, Inc. Representatives to Discuss the Nrc'S Assessment
ML0802304472008-01-25025 January 2008
Summary of Meeting with Dominion Energy Kewaunee Inc. Licensee'S Amendment Request on Seismic Methodology for Analysis of Auxiliary Building Crane
ML0729601702007-10-31031 October 2007
Public Meeting Summary on the Reactor Oversight Process
ML0729005732007-10-17017 October 2007
Summary of Public Meeting with Dominion Energy Kewaunee to Discuss the Ongoing Substantive Cross-Cutting Issues
ML0725306142007-09-21021 September 2007
Public Meeting Summary on the Reactor Oversight Process
ML0721900152007-08-0909 August 2007
8/2/07 Public Meeting Summary on the Kewaunee Appeal of a Frequently Asked Question on the Mitigating Systems Performance Index
ML0709504642007-04-0505 April 2007
Summary of Public Meeting with Dominion Energy Kewaunee, Inc. Regarding the Kewaunee End-of-Cycle Plant Performance Assessment
ML0703304272007-02-26026 February 2007
Summary of January 25, 2007, Meeting with Dominion Energy Kewaunee Inc., on the Licensee'S Amendment Request Regarding the Use of TORMIS Methodology
ML0634605062006-12-12012 December 2006
Summary of Public Meeting with Dominion to Discuss Revised Risk Assessment Information and Future Actions for Kewaunee Power Station
ML0618405302006-07-0303 July 2006
Public Meeting Summary with Kewaunee to Discuss Improvement Initiatives
ML0609005782006-03-30030 March 2006
Public Meeting Summary Kewaunee End-of-Cycle Plant Performance Assessment
ML0604000982006-02-24024 February 2006
Summary of Meeting with Dominion Energy Kewaunee, Inc., to Discuss the Applicability of Dominion Safety and Core Design Methods to Kewaunee Power Station
ML0532103612005-11-16016 November 2005
Kewaunee Public Meeting Summary, Regulatory Conference for Flooding Issue and Management Meeting
ML0527702352005-09-29029 September 2005
Summary of the August 9, 2005, Public Meeting to Discuss the Kewaunee End-of-Cycle Plant Performance Assessment
ML0513100572005-05-12012 May 2005
Summary of Meeting with Nuclear Management Company, LLC Regarding the Auxiliary Feedwater Amendment Request Dated May 5, 2005, and the Internal Flooding Design Basis
ML0507505452005-03-18018 March 2005
3/18/05, Kewaunee, Summary of Telephone Conference Steam Generator Water Chemistry Excursion (TAC No. M40695)
ML0435801802004-12-22022 December 2004
Summary of Public Meeting with Nuclear Management Company, Llc. to Discuss Engineering Initiatives
ML0418202382004-05-21021 May 2004
Public Meeting Summary with Nuclear Management Company, LLC Re Kewaunee 2003 End-of-Cycle Assessment
ML0333709182003-12-15015 December 2003
Summary of Meeting with Nuclear Management Company, LLC, Regarding Amendment Requests to Use Alternate Source Term Methodology at Prairie Island and Kewaunee
ML0323103952003-08-18018 August 2003
Point Beach & Kewaunee Meeting Summary Reactor Vessel Head Replacement Activities
ML0323101482003-08-18018 August 2003
Point Beach & Kewaunee Meeting Summary Reactor Vessel Head Replacement Activities
ML0312504092003-04-21021 April 2003
Public Meeting Summary with Nuclear Management Co. LLC Kewaunee to Discuss Kewaunee Performance Re EOC
ML0222502832002-08-20020 August 2002
Summary of Meeting Between the NRC Staff and Nuclear Management Company, LLC Upcoming Power Uprate and Associated Submittals for Kewaunee
ML0214900232002-05-31031 May 2002
Meeting with Nuclear Management Company, LLC, to Discuss Their Response to Interim Compensatory Measure B.2.b of the Security Orders
2019-10-24
[Table view]
Category:Memoranda
MONTHYEARML19289D4842019-10-24024 October 2019
Summary for NEIMA-Kewaunee Meeting on 9/24/2019
ML19165A0342019-06-14014 June 2019
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 (Collectively, Dominion) Decommissioning Funding Plans Submi
ML17271A0532017-09-29029 September 2017
2017 Summary of Annual Decommissioning Funding Status Reports for Reactors in Decommissioning
ML17053A5902017-02-24024 February 2017
Closeout of Generic Letter 2016-01, Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools.
ML16176A3392016-10-28028 October 2016
Decommissioning Lessons Learned Report and Transmittal Memorandum
ML16217A0912016-08-0404 August 2016
Technical Assistance Request for Review of Dominion Energy Kewaunee'S LAR No. 263 Regarding Drop Load Analysis (CAC No. L53143)
ML16190A3452016-07-13013 July 2016
Inc. Pre-Submittal Meeting Regarding Load Drop Analysis for Spent Fuel Cask Handling Operations at Kewaunee Power Station (L53130)
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
ML15279A4312015-10-0707 October 2015
Memorandum Request for Technical Assistance on License Amendment 259, ISFSI Only EP (TAC No. L53082)
ML14023A6782014-01-27027 January 2014
Staff Review of Revised Responses to EA-07-195 for the Implementation of Additional Security Measures - Kewaunee Power Station Independent Spent Fuel Storage (TAC L24854)
ML13143A3682013-05-29029 May 2013
Notice of Forthcoming Meeting with Dominion Energy Kewaunee to Discuss Plans for Kewaunee Power Station Regarding Emergency Preparedness
ML13116A3262013-04-30030 April 2013
Forthcoming Closed Meeting with Dominion Energy Kewaunee Staff to Discuss Planning for Physical Security at Kewaunee Power Station
ML13091A1872013-04-0505 April 2013
MF1045 Kewaunee Decom PSDAR Public Mtg on 24 Apr 13 2013-03-29-1358
ML12319A4022012-11-15015 November 2012
Notice of Forthcoming Meeting with Dominion Energy Kewaunee to Discuss Plans by Kewaunee Power Station to Implement Orders from Lessons Learned from Events in Fukushima, Japan
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,
ML1111904522011-04-29029 April 2011
Notice of Meeting with Dominion Energy Kewaunee to Present the Licensee the Results of NRC End-Of-Cycle Assessment of Kewaunee Power Station
ML1032104512010-11-17017 November 2010
Certification of Meeting Minutes of the Plant License Renewal Subcommittee on August 18, 2010 (Kewaunee Power Plant).Certification of Meeting Minutes of the Plant License Renewal Subcommittee on August 18, 2010 (Kewaunee Power Plant)
ML1024402012010-09-16016 September 2010
08/31/10 Summary of Telephone Conference Call Between Dominion Energy Kewaunee, Inc. and the U.S. Nuclear Regulatory Commission Concerning a Draft Request for Additional Information Pertaining to the Kewaunee Power Station License Renewal A
ML1011901162010-07-15015 July 2010
Memorandum to ACRS Subcommittee Re Kewaunee SER
ML1012601102010-05-18018 May 2010
Summary of Public Meetings Conducted to Discuss the Draft Supplement Environmental Impact Statement Related to the Review of the Kewaunee Power Station License Renewal Application
ML1011707792010-04-30030 April 2010
Notice of Meeting with Kewaunee Personnel to Discuss Kewaunee'S Proposed Response to an RAI Regarding Generic Letter 2004-02
ML1007107412010-03-31031 March 2010
Summary of Telephone Conference Call Between Dominion Energy Kewaunee, Inc. and the NRC to Discuss Certain RAI Responses on Two Mechanical Systems
ML1003210772010-02-16016 February 2010
Summary of Telephone Conference Call Between Dominion Energy Kewaunee, Inc. and USNRC to Discuss Certain Request for Additional Information on Structural Items
ML0934313392009-12-16016 December 2009
Summary of Telephone Conference Call on December 9, 2009, Between Dominion Energy Kewaunee Inc., and U.S. NRC to Discuss Tables Referenced in the Work Control Process Amendment Letter
ML0932302572009-11-27027 November 2009
Summary of Conference Call with Dominion Energy Kewaunee, Inc., to Discuss Program for Neutron Absorbing Material
ML0923801712009-08-28028 August 2009
Notice of Telephone Conference Meeting with Dominion Energy Kewaunee, to Discuss Licensee'S Proposed Response to Request Regarding Generic Letter 2004-02
ML0918205652009-07-0808 July 2009
Summary of Conference Calls with Dominion Energy Kewaunee, Inc., to Discuss Response to Follow-Up Question Regarding Severe Accident Mitigation Alternatives Request for Additional Information for Kewaunee Power Station
ML0835700272008-12-23023 December 2008
Meeting Notice, Meeting with Dominion Energy Kewaunee, Inc., to Discuss a Future Application to Convert the Kewaunee Technical Specifications from the Current Custom Format to the Improved Standard Format
ML0830904522008-11-17017 November 2008
10/22/08 Summary of Public License Renewal Overview and Environmental Scoping Meeting Related to the Review of the Kewaunee Power Station License Renewal Application
ML0827501122008-10-0808 October 2008
10/22/2008-Notice of Meeting to Discuss License Renewal Process and Environmental Scoping Kewaunee Power Station
ML0820403272008-07-23023 July 2008
Notice of Meeting with Kewaunee Nuclear Plant Regarding Hostile Action Based Emergency Preparedness Drill Scenario Review
ML0814300772008-06-0202 June 2008
Conference Call with Dominion Regarding Proposed Changes to the Radiological Emergency Response Plan for Kewaunee Power Station
ML0807400842008-03-14014 March 2008
Draft Regulatory Guide for Comment
ML0802304472008-01-25025 January 2008
Summary of Meeting with Dominion Energy Kewaunee Inc. Licensee'S Amendment Request on Seismic Methodology for Analysis of Auxiliary Building Crane
ML0731801322007-11-15015 November 2007
Notice of Meeting with Dominion Energy Kewaunee, Inc., Concerning the Current License Amendment Application Regarding Internal Flooding at the Kewaunee Power Station
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
ML0721900152007-08-0909 August 2007
8/2/07 Public Meeting Summary on the Kewaunee Appeal of a Frequently Asked Question on the Mitigating Systems Performance Index
ML0717905882007-07-0202 July 2007
Notice of Meeting with Industry to Discuss a Reactor Oversight Process Appeal of a Frequently Asked Question on the Mitigating Systems Performance Index
ML0634003252006-12-0707 December 2006
Notice of Presubmittal Conference for Proposed Emergency Plan Changes
ML0626801062006-09-21021 September 2006
Memo to Dyer from Paul, Kewaunee Nuclear Power Plant: Deliberate Failure by Contractors to Follow Fitness for Duty Regulation
ML0612301072006-05-0505 May 2006
Region III Comments on Draft Response to Task Interface Agreement 2005-10 Relating to Impact of Flooding on Residual Heat Removal (RHR) Pumps at Kewaunee Power Station
ML0601704112006-01-19019 January 2006
Notice of Meeting with Dominion Energy Kewaunee, Inc. to Discuss Proposed Accident Analysis Methodology for the Kewaunee Nuclear Power Plant
ML0527702352005-09-29029 September 2005
Summary of the August 9, 2005, Public Meeting to Discuss the Kewaunee End-of-Cycle Plant Performance Assessment
ML0517405322005-08-0303 August 2005
NPP - Closeout Letter for Bulletin 2003-01, Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reators.
ML0511700412005-04-27027 April 2005
Forthcoming Meeting with Nuclear Management Company, LLC to Discuss Auxiliary Feedwater License Amendment Request for the Kewaunee Nuclear Power Plant
ML0507505452005-03-18018 March 2005
3/18/05, Kewaunee, Summary of Telephone Conference Steam Generator Water Chemistry Excursion (TAC No. M40695)
ML0421003322004-06-30030 June 2004
Close-out of Tacs Relating to the Review of 35-day Letters Submitted in Response to the April 29, 2003, Orders Revising the Design Basis and Security Guard Force Training Enhancements and Physical Fitness Requirements
ML0417400862004-06-21021 June 2004
All Region III Facility Training Managers Revised NRC Form 398 - Personal Qualification Statement Licensee
ML0407004402004-04-18018 April 2004
Technical Specification 3.4b, Auxiliary Feedwater System, Interpretation
2019-06-14
[Table view] |
Text
March 18, 2005 MEMORANDUM TO: Aby Mohseni, Acting Director Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: L. Raghavan, Chief, Section 1 /RA/
Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation
SUBJECT:
KEWAUNEE NUCLEAR POWER PLANT -
SUMMARY
OF TELEPHONE CONFERENCE RE: STEAM GENERATOR WATER CHEMISTRY EXCURSION (TAC NO. M40695)
This memorandum summarizes the telephone discussion on March 3, 2005, between U. S. Nuclear Regulatory Commission staff and Nuclear Management Company, LLC (the licensee) regarding a steam generator chemistry excursion at the Kewaunee Nuclear Power Plant on February 20, 2005. Nuclear Reactor Regulation staff (K. Karwoski, F. Lyon, et al.)
and licensee staff (K. Hoops, W. Flynt, G. Riste, et al.) participated in the call.
During a plant shutdown/cooldown on February 20, 2005, approximately 1000 gallons of service water, which is drawn from Lake Michigan, entered the secondary side of the steam generators at Kewaunee. Additional information regarding the cause of the shutdown is provided in Preliminary Notification PNO-III-05-003, Shutdown in Excess of 72 Hours Due to Auxiliary Feedwater System Declared Inoperable Due to High Energy Line Break Concerns" (ADAMS ML050540652) and in Event Notifications 41423 and 41425.
The enclosed summary provides the details of the staff's discussion with the licensee. No regulatory decisions were made during the call. The staff did not identify any immediate or additional safety concerns to the licensee.
Docket No. 50-305
Enclosure:
As stated
March 18, 2005 MEMORANDUM TO: Aby Mohseni, Acting Director Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: L. Raghavan, Chief, Section 1 /RA/
Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation
SUBJECT:
KEWAUNEE NUCLEAR POWER PLANT -
SUMMARY
OF TELEPHONE CONFERENCE RE: STEAM GENERATOR WATER CHEMISTRY EXCURSION (TAC NO. M40695)
This memorandum summarizes the telephone discussion on March 3, 2005, between U. S. Nuclear Regulatory Commission staff and Nuclear Management Company, LLC (the licensee) regarding a steam generator chemistry excursion at the Kewaunee Nuclear Power Plant on February 20, 2005. Nuclear Reactor Regulation staff (K. Karwoski, F. Lyon, et al.)
and licensee staff (K. Hoops, W. Flynt, G. Riste, et al.) participated in the call.
During a plant shutdown/cooldown on February 20, 2005, approximately 1000 gallons of service water, which is drawn from Lake Michigan, entered the secondary side of the steam generators at Kewaunee. Additional information regarding the cause of the shutdown is provided in Preliminary Notification PNO-III-05-003, Shutdown in Excess of 72 Hours Due to Auxiliary Feedwater System Declared Inoperable Due to High Energy Line Break Concerns" (ADAMS ML050540652) and in Event Notifications 41423 and 41425.
The enclosed summary provides the details of the staff's discussion with the licensee. No regulatory decisions were made during the call. The staff did not identify any immediate or additional safety concerns to the licensee.
Docket No. 50-305
Enclosure:
As stated DISTRIBUTION:
PUBLIC MMurphy YDiaz-Castillo PD3-1 R/F DHills, RIII THarris FLyon KKarwoski LRaghavan LMiller LLund NMorgan ADAMS Accession Number: ML050750545 *memo to LRaghavan OFFICE PDIII-1/PM PDIII-1/LA EMCB/SC PDIII-1/SC NAME FLyon THarris LLund* LRaghavan DATE 03/18/05 03/17/05 3/14/05 03/18/05 OFFICIAL RECORD COPY
SUMMARY
OF MARCH 3, 2005, CONFERENCE CALL STEAM GENERATOR WATER CHEMISTRY EXCURSION NUCLEAR MANAGEMENT COMPANY, LLC KEWAUNEE NUCLEAR POWER PLANT DOCKET NO. 50-305 On March 3, 2005, the Nuclear Regulatory Commission staff participated in a conference call with representatives from Nuclear Management Company, LLC (NMC, the licensee) regarding a steam generator water chemistry excursion at Kewaunee Nuclear Power Plant.
A summary of the information provided by the licensee during the call is provided below.
Kewaunee has two steam generators designed by Westinghouse and fabricated by Ansaldo Energia. The steam generators were installed in 2001. The thermally-treated Alloy 690 steam generator tubes have an outside diameter of 0.875-inch and a nominal wall thickness of 0.050-inch. The tubes are hydraulically expanded for the full depth of the tube sheet at each end and are supported by a number of stainless steel tube support plates and anti-vibration bars.
During a plant shutdown/cooldown February 20, 2005, approximately 1000 gallons of service water, which is drawn from Lake Michigan, entered the secondary side of the steam generators at Kewaunee. Additional information regarding the event is provided in Preliminary Notification Report, PNO-III-05-003, Shutdown in Excess of 72 Hours Due to Auxiliary Feedwater System Declared Inoperable Due to High Energy Line Break Concerns" (ML050540652) and in Event Notifications 41423 and 41425.
At the time of the introduction of the service (Lake Michigan) water, the steam generator pressure was 62 pounds per square inch gauge (psig) in Steam Generator A and 56 psig in Steam Generator B. The saturation temperatures associated with these pressures are 309 EF and 304 EF, respectively.
The typical chemical composition of Lake Michigan water is 5 parts per million (ppm) sodium, 38 ppm calcium, 12 ppm magnesium, 144 ppm bicarbonate, 10 ppm chloride, and 22 ppm sulfate. The total dissolved solids is 233 and the pH is 8.5.
The steam generator secondary water pH never dropped below 9.5 during this excursion.
Steam Generator B was considered to have the most off-normal water chemistry. It had 397 parts per billion (ppb) sodium, 2.03 ppm calcium, 699 ppb magnesium, 618 ppb chloride, and 1.47 ppm sulfate. The pH was 9.85. The licensee is following the Electric Power Research Institute (EPRI) water chemistry guidelines.
After the introduction of the service (Lake Michigan) water, Kewaunee interacted with EPRI and Westinghouse experts. They evaluated the near- and long-term implications of the water chemistry excursion, particularly with respect to the potential for the water chemistry
to result in cracking or pitting of the steam generator tubes. With respect to cracking in the near-term, they do not anticipate any cracking given the Alloy 690 tube material, the low temperature at the time of the service water introduction, and the absence of any appreciable heat flux at the time. With respect to pitting in the near-term, they do not anticipate any pitting since the secondary water was not highly oxidizing or acidic nor did it contain any copper. In the long-term, there is a possibility that the service water impurities (e.g., chlorides) could accumulate in deposits including sludge collars on the tubes. Given the recent replacement of the steam generators, the low iron transport into the steam generators, and the minimal heat flux following the service water introduction, flushing the impurities from the steam generators was recommended to avoid any long-term impact of the chemical excursion.
In order to drain and refill (flush) the steam generators, the auxiliary feedwater piping had to be flushed since it still contained service water. The piping was flushed through the auxiliary feedwater pump casing drain and a downstream drainline in the pipe. Some of the sections of the pipe could not be flushed so the water was introduced into the steam generators. The flushing operation was completed on February 24, 2005. On February 27, 2005, Steam Generator B was drained and refilled, and on February 28, 2005, Steam Generator A was drained and refilled. After the flush, the steam generators contained less than 100 ppb chloride. One more drain and refill is planned for the week of March 7, 2005.
The licensee reviewed related operating experience and identified a phosphate excursion at Vogtle Electric Generating Plant in 2002 (see ADAMS ML031150065 and ADAMS ML042430424). This excursion was considered more limiting since it involved thermally treated Alloy 600 tubes. To date, Vogtle has not identified any corrosion degradation in their steam generators.
The next steam generator tube inspections at Kewaunee are planned for April 2006.
