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Category:MEETING MINUTES & NOTES--CORRESPONDENCE
MONTHYEARML20211N5371999-09-0808 September 1999 Summary of 990901 Meeting with Util in Rockville MD Re Plans for Advanced Core Monitoring Sys.List of Attendees & Licensee Agenda Encl ML20196L1131999-07-0101 July 1999 Summary of 990330 Meeting with Util in Rockville,Md to Discuss Status of NRC Review of Bge License Renewal Application for Calvert Cliffs Nuclear Power Plant,Unit 1 & 2.List of Attendees & Meeting Slides Encl ML20196K4621999-07-0101 July 1999 Summary of 990114 Meeting with Util in Rockville,Md Re Status of NRC Review of Bg&E License Renewal Application for Calvert Cliffs Npp.List of Meeting Attendees & Meeting Slides Encl ML20196G4301999-06-24024 June 1999 Summary of 981216 Meeting with Util in Rockville,Md to Discuss Status of NRC Review of Bge License Renewal Application for Plant,Units 1 & 2 ML20196F8281999-06-24024 June 1999 Summary of 981203 Meeting with Representatives of & Contractors to Util in Rockville,Md Re Bge Performance on Aging Mgt Evaluation Re Susceptibility of Cast Austenitic Stainless Steel Components to Thermal Embrittlement.W/Encl ML20195J0781999-06-14014 June 1999 Summary of 990512 Meeting with Util in Rockville,Md Re Licensee Renewal Activities for Calvert Cliffs Nuclear Power Plant.List of Meeting Attendees & Slides Used by NRC & Util Encl ML20206S2841999-05-19019 May 1999 Summary of 990427 Telcon with Util Re Recent Secondary Side SG Insp Activities at Plant,Unit 2.Replacement SGs Are Planned to Be Installed in Spring 2002 for Units 1 & 2 ML20207A3041999-05-18018 May 1999 Summary of 990505 & 10 Telcons with Util Re License Renewal Application on Metal Fatique ML20206U5621999-05-17017 May 1999 Summary of 990428 Meeting with Bg&E in Rockville,Md to Discuss Plant Steam Generator Replacement Projects.List of Attendees & Meeting Handouts Encl ML20204H5911999-03-19019 March 1999 Summary of 990210 Meeting with Bge in Lusby,Md Re License Renewal Activities for Ccnpp,Units 1 & 2 & Use of age- Related Degradation Insps as Outlined in 990202,meeting Announcement.List of Attendees & Slides Encl ML20204H4541999-03-19019 March 1999 Summary of 990216 & 18 Meetings with Util in Lusby,Md Re License Renewal Activities for Plant,Units 1 & 2.List of Meeting Attendees & Summary of RAIs That Were Discussed by Staff with Bge Staff & Info Obtained from Bge Staff Encl ML20202J7131999-01-28028 January 1999 Summary of 990107 Meeting with Util Re Info Provided by Util for Severe Accident Mitigation Alternative (SAMA) Review & Site Audit ML20198K6461998-12-28028 December 1998 Summary of 981202 Meeting with Util in Rockville,Md to Discuss Proposed TS Amend Allowing Installation of Sleeves in Defective SG Tubing in Calvert Cliffs,Units 1 & 2.List of Attendees & Presentations Slides Provided by Licensee Encl ML20198A4201998-12-11011 December 1998 Summary of 981022 Meeting with Util in Rockville,Md to Discuss How Bge Addressed License Renewal Requirements for time-limited Aging Analyses & Generic Safety Issues as Applicable to Environ Qualification ML20198B8351998-12-11011 December 1998 Summary of 980820 Meeting with Util in Rockville,Md to Discuss Progress of NRC Staff Review of Util License Renewal Application & Provide Overview of Proposed Method for Evaluating Performance.List of Attendees & Slides Encl ML20198A2741998-12-10010 December 1998 Summary of 981123 Meeting with Bge Re Review of Plant Records Associated with Chemistry,Allow 600 & Boric Acid Corrosion Insp Programs Relied Upon in Bge License Renewal Application for Plant,Units 1 & 2 ML20195J0391998-11-16016 November 1998 Summary of 980928 Meeting with Util in Rockville,Md Re License Renewal Activities for Plant,Units 1 & 2 & to Provide Rept Card for Both NRC & Util ML20195F3961998-11-13013 November 1998 Summary of 981029 Meeting W/Nei,Bge & Duke Energy Re Status of License Renewal Activities.List of Attendees & Slides Presented by Bge for Status of Calvert Cliffs License Renewal Application Review Encl ML20195D4401998-11-13013 November 1998 Summary of 980813 Meeting W/Bg&E in Rockville,Md to Discuss Bg&E Fire Protection Evaluation,Section 5.10,contained within License Renewal Application.List of Attendees & Presentation Slides Encl ML20195H9311998-11-13013 November 1998 Summary of 980626 Meeting with Bg&E in Rockville,Md Re Bg&E Structures & System Walkdown Program for License Renewal. List of Meeting Attendees & Bg&E Presentation Slides Encl ML20195F4011998-11-13013 November 1998 Summary of 980915 Meeting with NEI License Renewal Task Force in Rockville,Md Re Prioritization of Generic License Renewal Issues for Resolution.List of Meeting Attendees, Resolution Criteria & List of Issues Encl ML20195F9571998-11-13013 November 1998 Summary of 980625 Meeting with Bg&E in Rockville,Md Re Bg&E age-related Degradation & Insp Program for License Renewal. List of Meeting Attendees & Slides Used by Bg&E Encl ML20196A1821998-11-13013 November 1998 Summary of 980624 Meeting with Util in Rockville,Md Re Integrated Plant Assessment Process for License Renewal.List of Attendees & Slides Encl ML20151Z5801998-09-0707 September 1998 Summary of 980506 Meeting with Bg&E in Rockville,Md Re Util Proposed Responses to 980213 & 19 NRC Staff Requests for Addl Info on Bg&E License Renewal Feedwater Sys (5.9) & Dfos (5.7).List of Attendees & Util Proposed Responses,Encl ML20237C4651998-08-19019 August 1998 Summary of 980729 Meeting W/Bg&E & Contractor SG Team in Rockville,Md Re Plant,Units 1 & 2 SG Replacement Project. List of Attendees & Viewgraphs Distributed at Meeting Encl ML20236X6501998-07-28028 July 1998 Summary of 980709 Meeting W/Baltimore Gas & Electric Co in Solomons,Md Re Plant Environ Scoping Meetings to Support Review of License Renewal Application.List of Attendees & Presentation Matls Encl ML20249A9271998-06-16016 June 1998 Summary of 980604 Meeting W/Licensee in Rockville,Md to Discuss Replacement of Svc Water Heat Exchanges During Spring 1999 Refueling Outage on Unit 2.List of Attendees & Licensee Agenda Encl ML20247M4981998-05-15015 May 1998 Summary of 980319 Meeting W/Util Re Improved Tss.List of Attendees Encl ML20217K5921998-04-20020 April 1998 Summary of 980407 Meeting W/Util Re Control Room Habitability Issue W/Main Steam Line Break.List of Attendees,Util Presentation Matls & NRC Concept of CR Ventilation Sys Encl ML20216C8991998-04-10010 April 1998 Summary of 980326 Meeting W/Util in Rockville,Md to Discuss Licensee Plans for Inspecting SG Tubing in Upcoming Refueling Outage ML20203E0011998-02-12012 February 1998 Summary of 980126 Meeting W/Bg&E Re Plant,Units 1 & 2 Improved Ts.List of Attendees Encl ML20199B4121998-01-20020 January 1998 Summary of 980114 Meeting W/Bg&E in Rockville,Md Re Calvert Cliffs Nuclear Power Plant,Units 1 & 2,improved Tss.List of Attendees Encl ML20198H4011998-01-0505 January 1998 Summary of 971208 Meeting W/Bg&E in Rockville,Md Re Plant Pra.List of Attendees & Viewgraphs Encl ML20197K2121997-12-15015 December 1997 Summary of 971112,13 & 18 Meeting W/Baltimore Gas & Electric in Rockville,Md Re Clarification of Calvert Cliffs Improved Tss.List of Meeting Attendees Encl ML20211L9371997-10-0202 October 1997 Summary of 970827 Meeting W/Bg&E in Rockville,Md Re Reactor Pressure Vessel 10-year Inservice Inspection Project.List of Attendees & Copy of Viewgraphs Distributed at Meeting Encl ML20216J9411997-09-10010 September 1997 Summary of 970903 Meeting W/Baltimore Gas & Electric in Rockville,Md Re Calvert Cliffs Nuclear Power Plant,Units 1 & 2,service Water Modifications.List of Attendees & Copy of Viewgraphs Distributed at Meeting Encl ML20217B1771997-09-10010 September 1997 Summary of 970904 Meeting W/Bg&E in Rockville,Md Re Clarification of Calvert Cliffs Ts,Sections 1.0,2.0,3.1,3.1 & 5.0.List of Meeting Attendees Encl ML20217N9991997-08-21021 August 1997 Summary of 970731 Meeting W/Bge in Rockville,Md Re Severe Accident Mitigation Alternatives Methodology.List of Attendees & Presentation Matl Encl ML20217P0401997-08-21021 August 1997 Summary of 961204 Meeting W/Util in Rockville,Md Re Calvert Cliffs Improved Tss.List of Attendees Encl ML20198F1221997-08-0505 August 1997 Summary of 970730 Meeting W/Bge in Rockville,Md Re Plant Improved Ts.List of Attendees Encl ML20151J5531997-07-31031 July 1997 Summary of 970715 Meeting W/Bge in Rockville,Md Re Matters Related to Operability of SW Sys & SRW ML20148K7771997-06-16016 June 1997 Summary of 970605 Senior Mgt Meeting W/Util in Rockville,Md Re License Renewal Environ Rept (Er) Template Process.List of Participants & Handouts Encl ML20148H2211997-05-27027 May 1997 Summary of 970519 Meeting W/Bge in Rockville,Md to Discuss License Renewal Er Template Process.List of Attendees Encl ML20137W5311997-04-16016 April 1997 Summary of 970408 Meeting W/Util in Rockville,Md to Discuss Responses to Staff 960830 Rai.List of Attendees Encl ML20147G8651997-03-26026 March 1997 Summary of 970226 Meeting W/Bge in Rockville MD to Discuss Util Response to Staff 960830 Rai.List of Attendees & Matls Distributed at Meeting Encl ML20137E3501997-03-24024 March 1997 Summary of 970307 Meeting W/Bge in Rockville MD to Provide Comments on License Renewal Er Template Proposed by Util. List of Meeting Participants Encl 1999-09-08
[Table view] Category:MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
MONTHYEARML20211N5371999-09-0808 September 1999 Summary of 990901 Meeting with Util in Rockville MD Re Plans for Advanced Core Monitoring Sys.List of Attendees & Licensee Agenda Encl ML20196L1131999-07-0101 July 1999 Summary of 990330 Meeting with Util in Rockville,Md to Discuss Status of NRC Review of Bge License Renewal Application for Calvert Cliffs Nuclear Power Plant,Unit 1 & 2.List of Attendees & Meeting Slides Encl ML20196K4621999-07-0101 July 1999 Summary of 990114 Meeting with Util in Rockville,Md Re Status of NRC Review of Bg&E License Renewal Application for Calvert Cliffs Npp.List of Meeting Attendees & Meeting Slides Encl ML20196G4301999-06-24024 June 1999 Summary of 981216 Meeting with Util in Rockville,Md to Discuss Status of NRC Review of Bge License Renewal Application for Plant,Units 1 & 2 ML20196F8281999-06-24024 June 1999 Summary of 981203 Meeting with Representatives of & Contractors to Util in Rockville,Md Re Bge Performance on Aging Mgt Evaluation Re Susceptibility of Cast Austenitic Stainless Steel Components to Thermal Embrittlement.W/Encl ML20195J0781999-06-14014 June 1999 Summary of 990512 Meeting with Util in Rockville,Md Re Licensee Renewal Activities for Calvert Cliffs Nuclear Power Plant.List of Meeting Attendees & Slides Used by NRC & Util Encl ML20206S2841999-05-19019 May 1999 Summary of 990427 Telcon with Util Re Recent Secondary Side SG Insp Activities at Plant,Unit 2.Replacement SGs Are Planned to Be Installed in Spring 2002 for Units 1 & 2 ML20207A3041999-05-18018 May 1999 Summary of 990505 & 10 Telcons with Util Re License Renewal Application on Metal Fatique ML20206U5621999-05-17017 May 1999 Summary of 990428 Meeting with Bg&E in Rockville,Md to Discuss Plant Steam Generator Replacement Projects.List of Attendees & Meeting Handouts Encl ML20204H5911999-03-19019 March 1999 Summary of 990210 Meeting with Bge in Lusby,Md Re License Renewal Activities for Ccnpp,Units 1 & 2 & Use of age- Related Degradation Insps as Outlined in 990202,meeting Announcement.List of Attendees & Slides Encl ML20204H4541999-03-19019 March 1999 Summary of 990216 & 18 Meetings with Util in Lusby,Md Re License Renewal Activities for Plant,Units 1 & 2.List of Meeting Attendees & Summary of RAIs That Were Discussed by Staff with Bge Staff & Info Obtained from Bge Staff Encl ML20202J7131999-01-28028 January 1999 Summary of 990107 Meeting with Util Re Info Provided by Util for Severe Accident Mitigation Alternative (SAMA) Review & Site Audit ML20198K6461998-12-28028 December 1998 Summary of 981202 Meeting with Util in Rockville,Md to Discuss Proposed TS Amend Allowing Installation of Sleeves in Defective SG Tubing in Calvert Cliffs,Units 1 & 2.List of Attendees & Presentations Slides Provided by Licensee Encl ML20198A4201998-12-11011 December 1998 Summary of 981022 Meeting with Util in Rockville,Md to Discuss How Bge Addressed License Renewal Requirements for time-limited Aging Analyses & Generic Safety Issues as Applicable to Environ Qualification ML20198B8351998-12-11011 December 1998 Summary of 980820 Meeting with Util in Rockville,Md to Discuss Progress of NRC Staff Review of Util License Renewal Application & Provide Overview of Proposed Method for Evaluating Performance.List of Attendees & Slides Encl ML20198A2741998-12-10010 December 1998 Summary of 981123 Meeting with Bge Re Review of Plant Records Associated with Chemistry,Allow 600 & Boric Acid Corrosion Insp Programs Relied Upon in Bge License Renewal Application for Plant,Units 1 & 2 ML20195J0391998-11-16016 November 1998 Summary of 980928 Meeting with Util in Rockville,Md Re License Renewal Activities for Plant,Units 1 & 2 & to Provide Rept Card for Both NRC & Util ML20195D4401998-11-13013 November 1998 Summary of 980813 Meeting W/Bg&E in Rockville,Md to Discuss Bg&E Fire Protection Evaluation,Section 5.10,contained within License Renewal Application.List of Attendees & Presentation Slides Encl ML20195F3961998-11-13013 November 1998 Summary of 981029 Meeting W/Nei,Bge & Duke Energy Re Status of License Renewal Activities.List of Attendees & Slides Presented by Bge for Status of Calvert Cliffs License Renewal Application Review Encl ML20195F4011998-11-13013 November 1998 Summary of 980915 Meeting with NEI License Renewal Task Force in Rockville,Md Re Prioritization of Generic License Renewal Issues for Resolution.List of Meeting Attendees, Resolution Criteria & List of Issues Encl ML20195F9571998-11-13013 November 1998 Summary of 980625 Meeting with Bg&E in Rockville,Md Re Bg&E age-related Degradation & Insp Program for License Renewal. List of Meeting Attendees & Slides Used by Bg&E Encl ML20195H9311998-11-13013 November 1998 Summary of 980626 Meeting with Bg&E in Rockville,Md Re Bg&E Structures & System Walkdown Program for License Renewal. List of Meeting Attendees & Bg&E Presentation Slides Encl ML20196A1821998-11-13013 November 1998 Summary of 980624 Meeting with Util in Rockville,Md Re Integrated Plant Assessment Process for License Renewal.List of Attendees & Slides Encl ML20151Z5801998-09-0707 September 1998 Summary of 980506 Meeting with Bg&E in Rockville,Md Re Util Proposed Responses to 980213 & 19 NRC Staff Requests for Addl Info on Bg&E License Renewal Feedwater Sys (5.9) & Dfos (5.7).List of Attendees & Util Proposed Responses,Encl ML20237C4651998-08-19019 August 1998 Summary of 980729 Meeting W/Bg&E & Contractor SG Team in Rockville,Md Re Plant,Units 1 & 2 SG Replacement Project. List of Attendees & Viewgraphs Distributed at Meeting Encl ML20236X6501998-07-28028 July 1998 Summary of 980709 Meeting W/Baltimore Gas & Electric Co in Solomons,Md Re Plant Environ Scoping Meetings to Support Review of License Renewal Application.List of Attendees & Presentation Matls Encl ML20249A9271998-06-16016 June 1998 Summary of 980604 Meeting W/Licensee in Rockville,Md to Discuss Replacement of Svc Water Heat Exchanges During Spring 1999 Refueling Outage on Unit 2.List of Attendees & Licensee Agenda Encl ML20247M4981998-05-15015 May 1998 Summary of 980319 Meeting W/Util Re Improved Tss.List of Attendees Encl ML20217K5921998-04-20020 April 1998 Summary of 980407 Meeting W/Util Re Control Room Habitability Issue W/Main Steam Line Break.List of Attendees,Util Presentation Matls & NRC Concept of CR Ventilation Sys Encl ML20216C8991998-04-10010 April 1998 Summary of 980326 Meeting W/Util in Rockville,Md to Discuss Licensee Plans for Inspecting SG Tubing in Upcoming Refueling Outage ML20203E0011998-02-12012 February 1998 Summary of 980126 Meeting W/Bg&E Re Plant,Units 1 & 2 Improved Ts.List of Attendees Encl ML20199B4121998-01-20020 January 1998 Summary of 980114 Meeting W/Bg&E in Rockville,Md Re Calvert Cliffs Nuclear Power Plant,Units 1 & 2,improved Tss.List of Attendees Encl ML20198H4011998-01-0505 January 1998 Summary of 971208 Meeting W/Bg&E in Rockville,Md Re Plant Pra.List of Attendees & Viewgraphs Encl ML20197K2121997-12-15015 December 1997 Summary of 971112,13 & 18 Meeting W/Baltimore Gas & Electric in Rockville,Md Re Clarification of Calvert Cliffs Improved Tss.List of Meeting Attendees Encl ML20211L9371997-10-0202 October 1997 Summary of 970827 Meeting W/Bg&E in Rockville,Md Re Reactor Pressure Vessel 10-year Inservice Inspection Project.List of Attendees & Copy of Viewgraphs Distributed at Meeting Encl ML20217B1771997-09-10010 September 1997 Summary of 970904 Meeting W/Bg&E in Rockville,Md Re Clarification of Calvert Cliffs Ts,Sections 1.0,2.0,3.1,3.1 & 5.0.List of Meeting Attendees Encl ML20216J9411997-09-10010 September 1997 Summary of 970903 Meeting W/Baltimore Gas & Electric in Rockville,Md Re Calvert Cliffs Nuclear Power Plant,Units 1 & 2,service Water Modifications.List of Attendees & Copy of Viewgraphs Distributed at Meeting Encl ML20217P0401997-08-21021 August 1997 Summary of 961204 Meeting W/Util in Rockville,Md Re Calvert Cliffs Improved Tss.List of Attendees Encl ML20217N9991997-08-21021 August 1997 Summary of 970731 Meeting W/Bge in Rockville,Md Re Severe Accident Mitigation Alternatives Methodology.List of Attendees & Presentation Matl Encl ML20198F1221997-08-0505 August 1997 Summary of 970730 Meeting W/Bge in Rockville,Md Re Plant Improved Ts.List of Attendees Encl ML20151J5531997-07-31031 July 1997 Summary of 970715 Meeting W/Bge in Rockville,Md Re Matters Related to Operability of SW Sys & SRW ML20148K7771997-06-16016 June 1997 Summary of 970605 Senior Mgt Meeting W/Util in Rockville,Md Re License Renewal Environ Rept (Er) Template Process.List of Participants & Handouts Encl ML20148H2211997-05-27027 May 1997 Summary of 970519 Meeting W/Bge in Rockville,Md to Discuss License Renewal Er Template Process.List of Attendees Encl ML20137W5311997-04-16016 April 1997 Summary of 970408 Meeting W/Util in Rockville,Md to Discuss Responses to Staff 960830 Rai.List of Attendees Encl ML20147G8651997-03-26026 March 1997 Summary of 970226 Meeting W/Bge in Rockville MD to Discuss Util Response to Staff 960830 Rai.List of Attendees & Matls Distributed at Meeting Encl ML20137E3501997-03-24024 March 1997 Summary of 970307 Meeting W/Bge in Rockville MD to Provide Comments on License Renewal Er Template Proposed by Util. List of Meeting Participants Encl 1999-09-08
[Table view] |
Text
, MEMORANDUM TO: Fils l FROM: Stephania M. Coffin, Matsrials Engine::r Materials and Chemical Engineering Branch Division of Engineering
SUBJECT:
SUMMARY
OF APRIL 27,1999 PHONE CALL BETWEEN NRC STAFF AND BGE REPRESENTATIVES TO DISCUSS STEAM GENERATOR INSPECTION ACTIVITIES I On April 27,1999, representatives of Baltimore Gas and Electric Company (BGE) and NRC staff discussed over the telephone recent secondary side steam generator inspection activities at Calvert Cliffs Unit 2. The BGE participants were Elliott Flick and Anthony Saccavino. The staff participant was Stephanie Coffin.
During the current refueling outage, BGE performed secondary side visualinspections of the eggcrate tube supports in the periphery of the steam generators on both the hot and cold leg sides in the #21 and #22 steam generators. In the #21 steam generator, the licensee I documented minor degradation of the eggerate supports on the hot leg side at the 6",7*, and l 8* support elevations. In the #22 steam generator, the licensee performed similar inspections '
and found more extensive degradation of the eggcrate supports on the hot leg side at the 7" and 8* support elevations as well as on the cold leg side at the 6* support elevation. All the tubes in both steam generators were adequately supported. BGE preventatively plugged 4 i tubes in the #21 steam generator and 98 tubes in the #22 steam generator to address the l potential for continued degradation over the next operating cycle. Based on the location and nature of the degradation, BGE concluded the cause of the degradation is erosion corrosion, similar to, but much less extensive than that seen at San Onofre Unit 3. The San Onofre experience is discussed briefly in Generic Letter (GL) 97-06, " Degradation of Steam Generator Internals." The licensee performed an upper bundle flush and sludge lancing of the steam generators this outage and plans to adjust chemistry levels to improve resistance to erosion corrosion over the next operating cycle. BGE will reinspect the secondary side of the steam ,
generators during the next refueling outage to ascertain the effectiveness of the corrective l actions.
BGE performed similar secondary side inspections at Calvert Cliffs Unit 1 in 1996 and 1998 and documented no eggerate degradation.
The staff notes that the Combustion Engineering Owners Group ranked Calvert Cliffs Unit 2 as one of the most susceptible plants to this type of degradation, based on feodwater iron i transport rates, as documented in BGE's response to GL 97-06. Replacement steam generators are planned to be installed in the Spring 2002 for Calvert Cliffs Unit 1 and Spring 2003 for Calvert Cliffs Unit 2. l The staff provided a draft of this phone call summary to BGE to allow them the opportunity to ,
comment on the summary prior to issuance.
3 Docket Nos. 50-317 and 50-318 dL.
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Office DE:EMCB E DE:EMCB s Name SMCoffin iN EJSullivan Date 5/11/99 / /
ORIGINAL RECORD COPY
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e 2-The staff provided a draft of this phone call summary to BGE to allow them the opportunity to comment on the summary prior to issuance.
Docket Nos. 50-317 and 50-318 Distribution t Alex Dromerick Docket Files . e EMCB RF Bill Bateman Emmett Murphy DOCUMENT NAME: G:\EMCB\sg-files \CALVERT\ UNIT _2\eggcrate.wpd To receive a copy of this doctanent. lndicate in the bor *C* e Copy without attachment / enclosure "E" = Copy with attachment / enclosure *N' = No copy Office DE:EMCB E ,
Name SMCoffin 9" Date 5/19/99 ORIGINAL RECORD COPY l
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k 2 The staff provided a draft of this phone call summary to BGE to allow them the opportunity to comment on the summary prior to issuance.
Docket Nos. 50 317 and 50-318 Distribution Alex Dromerick Docket Files PUBLIC EMCB RF Bill Bateman Emmett Murphy DOCUMENT NAME:
To,.c.i..novoen.ooe- G:\EMCB\s me.c. men.w. g-files \CALVERT\ UNIT _2\eggerate.wpd c . c. . noui .n.cnm.nv.ncio.u,. r . cm .,n .,i.enm.nie.ncio.u,. v . No copy Office DE:EMCB E Name SMCoffin W Date 5/19/99 ORIGINAL RECORD COPY j
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2 j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20006 0001
,o May 19, 1999 MEMORANDUM TO: Edmund J. Sullivan, Jr., Section Chief NDE & Metallurgy Section Materials and Chemical Engineering Branch FROM: Stephanie M. Coffin, Materials Engineek k NDE & Metallurgy Section N
Materials and Chemical Engineering Branch
SUBJECT:
SUMMARY
OF APRIL 27,1999 PHONE CALL BETWEEN NRC STAFF AND BGE REPRESENTATIVES TO DISCUSS STEAM GENERATOR INSPECTION ACTIVITIES On April 27,1999, representatives of Baltimore Gas and Electric Company (BGE) and NRC staff discussed over the telephone recent secondary side steam generator inspection activities at Calvert Cliffs Unit 2. The BGE participants were Elliott Flick and Anthony Saccavino. The staff participant was Stephanie Coffin.
During the current refueling outage, BGE performed secondary side visualinspections of the eggerate tube supports in the periphery of the steam generators on both the hot and cold leg sides in the #21 and #22 steam generators, in the #21 steam generator, the licensee documented minor degradation of the eggerate supports on the hot leg side at the 6*,7*, and 8* support elevations. In the #22 steam generator, the licensee performed similar inspections and found more extensive degradation of the eggerate supports on the hot leg side at the 7*
and 8" support elevations as well as on the cold leg side at the 6* support elevation. All the tubes in both steam generators were adequately supported. BGE preventatively plugged 4 tubes in the #21 steam generator and 98 tubes in the #22 steam generator to address the potential for continued degradation over the next operating cycle. Based on the location and nature of the degradation, BGE concluded the cause of the degradation is erosion corrosion, similar to, but much less extensive than that seen at San Onofre Unit 3. The San Onofre experience is discussed briefly in Generic Letter (GL) 97-06, Degradation of Steam Generator internals." The licensee performed an upper bundle flush and sludge lancing of the steam generators this outage and plans to adjust chemistry levels to improve resistance to erosion corrosion over the next operating cycle. BGE will reinspect the secondary side of the steam generators during the next refueling outage to ascertain the effectiveness of the corrective actions. The staff views their corrective actions adequate at this time. We will continue to discuss this issue with BGE at their future outages.
BGE performed similar secondary side inspections at Calvert Cliffs Unit 1 in 1996 and 1998 and documented no eggerate degradation.
The staff notes that the Combustion Engineering Owners Group ranked Calvert Cliffs Unit 2 as one of the most susceptible plants to this type of degradation, based on feedwater iron transport rates, as documented in BGE's response to GL 97-06. Replacement steam generators, with stainless steel eggcrate supports, are planned to be installed in the Spring 2002 for Calvert Cliffs Unit 1 and Spring 2003 for Calvert Cliffs Unit 2.
'i I
The staff provided a draft of this phone call summary to BGE to allow them the opportunity to l comment on the summary prior to issuance.
Docket Nos. 50-317 and 50-318
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