|
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Category:MEETING MINUTES & NOTES--CORRESPONDENCE
MONTHYEARML20137F2351997-03-24024 March 1997
Summary of 970207 Meeting W/Listed Attendees in Rockville,Md to Discuss Nuclear Energy Inst Concerns Re Graded Quality Assurance Activities W/Volunteer Plants
ML20140H5981996-11-11011 November 1996
Summary of 435th Meeting of ACRS on 961009-12 Re Capability of NRC SCDAP/RELAP5 Code to Predict Temps & Flows in SGs Under severe-accident Conditions
ML20148B5761996-10-0404 October 1996
Summary of 434th Meeting of ACRS on 960912-13 Re Capability of SCAP/RELAP5 Code to Predict SG Temps During Severe Accidents
ML20058N7741993-12-0303 December 1993
Summary of Operating Reactors Events Meeting 93-45 on 931201
ML20057A5221993-07-28028 July 1993
Summary of Operating Reactors Events Meeting 93-27 on 930721
ML20056E2031993-06-15015 June 1993
Summary of Operating Reactors Events Meeting 93-20 on 930602
ML20128P8491993-02-18018 February 1993
Summary of Operating Reactors Events Briefing 93-05 on 930210
ML20217C5121991-07-0303 July 1991
Summary of Operating Reactors Events Meeting 91-12 on 910626
ML20058B7431990-10-19019 October 1990
Summary of 901010 Meeting W/Util & Consultants in Rockville, MD Re Licensee Plan to Pursue Reload Technology.List of Attendees Also Encl
ML20127J2961990-04-0606 April 1990
Trip Rept of Commissioner Curtiss 900201 Site Visit.Facility Has Undergone Radical Change in Mgt Personnel & Experiencing Problems W/High Attrition of Licensed Operators
ML20247R0161989-09-21021 September 1989
Summary of Operating Reactors Events Meeting 89-34 on 890920 to Brief Senior Managers & Regional Offices on Selected Events That Occured Since Last Meeting
ML20245G5421989-08-0303 August 1989
Summary of Operating Reactors Events Meeting 89-28 on 890802.List of Attendees,Events Discussed & Significant Elements of Events & Summaries of Reactor Scrams for Wks Ending 890723 & 30 Encl
ML20245D3881989-04-21021 April 1989
Summary of 890413 Meeting W/Control Components,Inc in Rockville,Md Re Operation of Atmospheric Dump Valves.Agenda, Slides Used During Meeting for Valve Description & Worst Case Model Assumptions Encl
ML20248K3761989-04-10010 April 1989
Summary of Operating Reactors Events Meeting 89-014 on 890405.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Reactor Scrams for Wk Ending 890402 Encl
ML20247F1991989-03-24024 March 1989
Summary of Operating Reactors Events Meeting 89-12 on 890322.List of Attendees,Events Discussed & Significant Elements,Summary of Reactor Scrams & Comparison of Weekly Statistics W/Industry Averages for Wk Ending 890319 Encl
ML20247A8971989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-11 on 890315.List of Attendees,Events Discussed & Significant Elements of Events & Four Events Identified for Input to NRC Performance Indicator Program & Summary of Scrams Encl
ML20246N9201989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-010 on 890308.List of Attendees,Significant Events Identified for Input to NRC Performance Indicator Program & Summary of Reactor Scrams for Wk Ending 890305 Encl
ML20207G3861988-08-12012 August 1988
Summary of 880803 Meeting W/Util in Rockville,Md Re Facility Auxiliary Transformer Fire & Reactor Trip Event Initiated by Combination of Cracked Insulating Matl & Dirt Accumulation.Briefing Slides Encl
ML20151K6901988-07-18018 July 1988
Summary of Operating Reactors Events Meeting 88-28 on 880712.Viewgraphs & List of Attendees Encl
ML20196B6471988-06-17017 June 1988
Summary of 880531 Meeting W/Licensee in Rockville,Md Re Auxiliary Feedwater Pump Degradation Events.Viewgraphs Encl
ML20154M8471988-05-17017 May 1988
Summary of 880414 Meeting W/Util & BNL in Rockville,Md Re Monitoring Program for Reactor Coolant Pump Shafts.List of Attendees & Related Documents Encl
ML20236W3951987-11-25025 November 1987
Summary of 870909 Meeting W/Util in Bethesda,Md Re Proposed Changes to Organizational Structure for Plant Submitted by & Selected Issues Listed on Meeting Agenda.List of Attendees,Agenda & Licensee Viewgraphs Encl
ML20237G3891987-08-27027 August 1987
Summary of Operating Reactors Events Meeting 87-25 on 870804 Re Events That Occurred Since 870728 Meeting.List of Attendees,Viewgraphs & Summary of Reactor Scrams Encl
ML20238A1841987-08-24024 August 1987
Summary of 870812 Meeting W/Util in Phoenix,Az Re Concerns Generated During Assessment of Operating Performance of Units 1 & 2 in Consideration of Pending Licensing Decision for Unit 3.Attendee List & Viewgraphs Encl
ML20237J6901987-08-19019 August 1987
Summary of 870730 Meeting W/Util & C-E in Phoenix,Az Re Util 870629 Submittal of Cycle 2 Reload Analysis & Proposed Tech Spec Changes.List of Attendees,Licensee Draft Responses & Addl Questions Raised by NRC Encl
ML20236J7051987-07-29029 July 1987
Summary of 870707 Operating Reactors Events Meeting 87-21 W/ Nrr,Aeod,Res & Regional Ofcs Re Events Occurring Since 870630 Meeting.List of Attendees,Discussion of Events & Summary of Reactor Scrams Also Encl
ML20214T3801987-06-0303 June 1987
Summary of 870508 Meeting W/Util in Bethesda,Md Re Proposed Tech Spec Changes Re Revised Shutdown Margin Requirements & Variable Overpower Trip Setpoints.List of Attendees Encl
ML20215H7961987-05-0101 May 1987
Summary of 870422 Meeting W/Util in Bethesda,Md Re Schedules for Cycle 2 Core Reloads.List of Attendees & Viewgraphs Encl
ML20204D7201987-03-19019 March 1987
Summary of 870226 Meeting W/Util in Bethesda,Md Re Resolution of NRC 860910 Comments on Plant Emergency Operating Procedures.List of Attendees & Draft Util Response to NRC Comments Encl
ML20212J0331987-03-0202 March 1987
Summary of 870224 Meeting W/Util in Bethesda,Md Re Rept Concerning Licensee Evaluations Performed on Steam Generators at Facilities.List of Meeting Attendees Encl
ML20029A2931987-01-30030 January 1987
Trip Rept of 870120 Briefing Re Emergency Diesel Generator 3B Failure on 861223
ML20210T4031987-01-28028 January 1987
Summary of Operating Reactors Events Meeting 87-02 on 870112 of Events Which Occurred Since 870105.List of Attendees,Events Discussed & Summary of Events Encl
ML20210T3641987-01-16016 January 1987
Summary of Operating Reactors Events Meeting 87-02 on 870112 Re Events Which Occurred Since 870105.List of Attendees,Events Discussed & Summary of Events Encl
ML20207P6271987-01-12012 January 1987
Summary of Operating Reactor Events Meeting 86-46 on 861229.List of Attendees,Events Discussed & Summary of Presented Events That Will Be Input to NRC Performance Indicator Program Encl
ML20207B8501986-12-18018 December 1986
Summary of 861209 Meeting W/Util & Eg&G Idaho in Bethesda,Md Re SPDS Testing Program Results,Tech Spec Change Requests & Unit 3 Licensing Submittals.List of Attendees & Viewgraphs Encl
ML20211L2981986-12-0808 December 1986
Summary of 860828 Meeting W/Util,Bechtel,Drexel Univ & Franklin Research Ctr in Bethesda,Md Re Licensee Evaluation of Adequacy of Certain Masonry Walls at Plant.List of Attendees & Viewgraphs Encl
ML20214H5811986-11-19019 November 1986
Summary of 861028 Mgt Meeting W/Util in Phoeniz,Az Re NRC Concerns Generated During Assessment of Operating Performance for Units 1 & 2 & to Identify Needed Improvements Prior to Licensing of Unit 3.Viewgraphs Encl
ML20213F0641986-11-10010 November 1986
Summary of Operating Reactors Events Meeting 86-36 on 861020.List of Attendees,Events Discussed,Significant Events Data Sheet,Summary of Scrams W/Complications & Status of Previous & New Assignments Encl
ML20215E3001986-10-0606 October 1986
Summary of 860924 Meeting W/Util & C-E in Bethesda,Md Re Scope & Schedule for Reload Licensing Activities.Viewgraphs Encl
ML20215D1431986-10-0606 October 1986
Summary of 860820 Meeting W/Util in Bethesda,Md to Discuss Util 860619 Submittal Re Adequacy of Masonry Walls. List of Attendees,Agenda & Viewgraphs Encl
ML20205G9551986-08-13013 August 1986
Summary of Operating Reactors Events Meeting 86-28 on 860811 Re Briefing of Ofc Director,Div Directors & Representatives on Events Discussed at 860804 Meeting.List of Attendees & Viewgraphs Encl
ML20211Q6161986-07-23023 July 1986
Summary of Operating Reactor Events Meeting 86-25 on 860721 Re Events Since 860714 Meeting.List of Attendees,Discussion of Events & Status of Assignments Encl.Response Requested for Incomplete Assignments
ML20197F7721986-05-0808 May 1986
Summary of Operating Reactors Events Meeting 86-15 on 860505.List of Attendees,Events Discussed & Status of Previous Assignments Encl
ML20154N8751986-03-12012 March 1986
Summary of Operating Reactor Events 860310 Meeting 86-07 W/Ornl Re Events Occurring Since 860303 Meeting.Followup Review Assignments,Status of Previous Assignments,List of Attendees & Viewgraphs Encl
ML20154C9931986-02-24024 February 1986
Summary of Operating Reactors Event Meeting 86-04 on 860210.List of Attendees,Briefing & Reactor Scram Summaries Encl
ML20205J3851986-01-23023 January 1986
Summary of ACRS 309th Meeting on 860109-11 in Washington,Dc Re Final Design Approval for Gessar II Design & Proposed Rev 3 to Reg Guide 1.63, Electric Penetration Assemblies in Containment Structures for Nuclear Power Plants
ML20205H8791986-01-22022 January 1986
Summary of Operating Reactor Events Meeting 86-02 on 860116 in Bethesda,Md Re Events Since 860106 Meeting.List of Attendees,List of Significant Elements of Events,Assignments & Status of Previous Assignments Encl
ML20141F0461985-12-30030 December 1985
Summary of Operating Reactors Events Meeting 85-28 on 851223.List of Attendees & Viewgraphs Encl
ML20205J0421985-11-21021 November 1985
Summary of ACRS 307th Meeting on 851107-09 in Washington, DC Re Review of Application of Beaver Valley Power Station 2,EPA Stds for High Level Radwaste Repository & Investigation of Significant Incidents at Power Plants
ML20136C5141985-11-11011 November 1985
Summary of Operating Reactors Event Meeting 85-21 on 851028.List of Attendees,Events Discussed & Completion Dates Assigned Encl
1997-03-24
[Table view]
Category:MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
MONTHYEARML20137F2351997-03-24024 March 1997
Summary of 970207 Meeting W/Listed Attendees in Rockville,Md to Discuss Nuclear Energy Inst Concerns Re Graded Quality Assurance Activities W/Volunteer Plants
ML20140H5981996-11-11011 November 1996
Summary of 435th Meeting of ACRS on 961009-12 Re Capability of NRC SCDAP/RELAP5 Code to Predict Temps & Flows in SGs Under severe-accident Conditions
ML20148B5761996-10-0404 October 1996
Summary of 434th Meeting of ACRS on 960912-13 Re Capability of SCAP/RELAP5 Code to Predict SG Temps During Severe Accidents
ML20058N7741993-12-0303 December 1993
Summary of Operating Reactors Events Meeting 93-45 on 931201
ML20057A5221993-07-28028 July 1993
Summary of Operating Reactors Events Meeting 93-27 on 930721
ML20056E2031993-06-15015 June 1993
Summary of Operating Reactors Events Meeting 93-20 on 930602
ML20128P8491993-02-18018 February 1993
Summary of Operating Reactors Events Briefing 93-05 on 930210
ML20217C5121991-07-0303 July 1991
Summary of Operating Reactors Events Meeting 91-12 on 910626
ML20058B7431990-10-19019 October 1990
Summary of 901010 Meeting W/Util & Consultants in Rockville, MD Re Licensee Plan to Pursue Reload Technology.List of Attendees Also Encl
ML20247R0161989-09-21021 September 1989
Summary of Operating Reactors Events Meeting 89-34 on 890920 to Brief Senior Managers & Regional Offices on Selected Events That Occured Since Last Meeting
ML20245G5421989-08-0303 August 1989
Summary of Operating Reactors Events Meeting 89-28 on 890802.List of Attendees,Events Discussed & Significant Elements of Events & Summaries of Reactor Scrams for Wks Ending 890723 & 30 Encl
ML20245D3881989-04-21021 April 1989
Summary of 890413 Meeting W/Control Components,Inc in Rockville,Md Re Operation of Atmospheric Dump Valves.Agenda, Slides Used During Meeting for Valve Description & Worst Case Model Assumptions Encl
ML20248K3761989-04-10010 April 1989
Summary of Operating Reactors Events Meeting 89-014 on 890405.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Reactor Scrams for Wk Ending 890402 Encl
ML20247F1991989-03-24024 March 1989
Summary of Operating Reactors Events Meeting 89-12 on 890322.List of Attendees,Events Discussed & Significant Elements,Summary of Reactor Scrams & Comparison of Weekly Statistics W/Industry Averages for Wk Ending 890319 Encl
ML20246N9201989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-010 on 890308.List of Attendees,Significant Events Identified for Input to NRC Performance Indicator Program & Summary of Reactor Scrams for Wk Ending 890305 Encl
ML20247A8971989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-11 on 890315.List of Attendees,Events Discussed & Significant Elements of Events & Four Events Identified for Input to NRC Performance Indicator Program & Summary of Scrams Encl
ML20207G3861988-08-12012 August 1988
Summary of 880803 Meeting W/Util in Rockville,Md Re Facility Auxiliary Transformer Fire & Reactor Trip Event Initiated by Combination of Cracked Insulating Matl & Dirt Accumulation.Briefing Slides Encl
ML20151K6901988-07-18018 July 1988
Summary of Operating Reactors Events Meeting 88-28 on 880712.Viewgraphs & List of Attendees Encl
ML20196B6471988-06-17017 June 1988
Summary of 880531 Meeting W/Licensee in Rockville,Md Re Auxiliary Feedwater Pump Degradation Events.Viewgraphs Encl
ML20154M8471988-05-17017 May 1988
Summary of 880414 Meeting W/Util & BNL in Rockville,Md Re Monitoring Program for Reactor Coolant Pump Shafts.List of Attendees & Related Documents Encl
ML20236W3951987-11-25025 November 1987
Summary of 870909 Meeting W/Util in Bethesda,Md Re Proposed Changes to Organizational Structure for Plant Submitted by & Selected Issues Listed on Meeting Agenda.List of Attendees,Agenda & Licensee Viewgraphs Encl
ML20237G3891987-08-27027 August 1987
Summary of Operating Reactors Events Meeting 87-25 on 870804 Re Events That Occurred Since 870728 Meeting.List of Attendees,Viewgraphs & Summary of Reactor Scrams Encl
ML20238A1841987-08-24024 August 1987
Summary of 870812 Meeting W/Util in Phoenix,Az Re Concerns Generated During Assessment of Operating Performance of Units 1 & 2 in Consideration of Pending Licensing Decision for Unit 3.Attendee List & Viewgraphs Encl
ML20237J6901987-08-19019 August 1987
Summary of 870730 Meeting W/Util & C-E in Phoenix,Az Re Util 870629 Submittal of Cycle 2 Reload Analysis & Proposed Tech Spec Changes.List of Attendees,Licensee Draft Responses & Addl Questions Raised by NRC Encl
ML20236J7051987-07-29029 July 1987
Summary of 870707 Operating Reactors Events Meeting 87-21 W/ Nrr,Aeod,Res & Regional Ofcs Re Events Occurring Since 870630 Meeting.List of Attendees,Discussion of Events & Summary of Reactor Scrams Also Encl
ML20214T3801987-06-0303 June 1987
Summary of 870508 Meeting W/Util in Bethesda,Md Re Proposed Tech Spec Changes Re Revised Shutdown Margin Requirements & Variable Overpower Trip Setpoints.List of Attendees Encl
ML20215H7961987-05-0101 May 1987
Summary of 870422 Meeting W/Util in Bethesda,Md Re Schedules for Cycle 2 Core Reloads.List of Attendees & Viewgraphs Encl
ML20204D7201987-03-19019 March 1987
Summary of 870226 Meeting W/Util in Bethesda,Md Re Resolution of NRC 860910 Comments on Plant Emergency Operating Procedures.List of Attendees & Draft Util Response to NRC Comments Encl
ML20212J0331987-03-0202 March 1987
Summary of 870224 Meeting W/Util in Bethesda,Md Re Rept Concerning Licensee Evaluations Performed on Steam Generators at Facilities.List of Meeting Attendees Encl
ML20210T4031987-01-28028 January 1987
Summary of Operating Reactors Events Meeting 87-02 on 870112 of Events Which Occurred Since 870105.List of Attendees,Events Discussed & Summary of Events Encl
ML20210T3641987-01-16016 January 1987
Summary of Operating Reactors Events Meeting 87-02 on 870112 Re Events Which Occurred Since 870105.List of Attendees,Events Discussed & Summary of Events Encl
ML20207P6271987-01-12012 January 1987
Summary of Operating Reactor Events Meeting 86-46 on 861229.List of Attendees,Events Discussed & Summary of Presented Events That Will Be Input to NRC Performance Indicator Program Encl
ML20207B8501986-12-18018 December 1986
Summary of 861209 Meeting W/Util & Eg&G Idaho in Bethesda,Md Re SPDS Testing Program Results,Tech Spec Change Requests & Unit 3 Licensing Submittals.List of Attendees & Viewgraphs Encl
ML20211L2981986-12-0808 December 1986
Summary of 860828 Meeting W/Util,Bechtel,Drexel Univ & Franklin Research Ctr in Bethesda,Md Re Licensee Evaluation of Adequacy of Certain Masonry Walls at Plant.List of Attendees & Viewgraphs Encl
ML20214H5811986-11-19019 November 1986
Summary of 861028 Mgt Meeting W/Util in Phoeniz,Az Re NRC Concerns Generated During Assessment of Operating Performance for Units 1 & 2 & to Identify Needed Improvements Prior to Licensing of Unit 3.Viewgraphs Encl
ML20213F0641986-11-10010 November 1986
Summary of Operating Reactors Events Meeting 86-36 on 861020.List of Attendees,Events Discussed,Significant Events Data Sheet,Summary of Scrams W/Complications & Status of Previous & New Assignments Encl
ML20215D1431986-10-0606 October 1986
Summary of 860820 Meeting W/Util in Bethesda,Md to Discuss Util 860619 Submittal Re Adequacy of Masonry Walls. List of Attendees,Agenda & Viewgraphs Encl
ML20215E3001986-10-0606 October 1986
Summary of 860924 Meeting W/Util & C-E in Bethesda,Md Re Scope & Schedule for Reload Licensing Activities.Viewgraphs Encl
ML20205G9551986-08-13013 August 1986
Summary of Operating Reactors Events Meeting 86-28 on 860811 Re Briefing of Ofc Director,Div Directors & Representatives on Events Discussed at 860804 Meeting.List of Attendees & Viewgraphs Encl
ML20211Q6161986-07-23023 July 1986
Summary of Operating Reactor Events Meeting 86-25 on 860721 Re Events Since 860714 Meeting.List of Attendees,Discussion of Events & Status of Assignments Encl.Response Requested for Incomplete Assignments
ML20197F7721986-05-0808 May 1986
Summary of Operating Reactors Events Meeting 86-15 on 860505.List of Attendees,Events Discussed & Status of Previous Assignments Encl
ML20154N8751986-03-12012 March 1986
Summary of Operating Reactor Events 860310 Meeting 86-07 W/Ornl Re Events Occurring Since 860303 Meeting.Followup Review Assignments,Status of Previous Assignments,List of Attendees & Viewgraphs Encl
ML20154C9931986-02-24024 February 1986
Summary of Operating Reactors Event Meeting 86-04 on 860210.List of Attendees,Briefing & Reactor Scram Summaries Encl
ML20205J3851986-01-23023 January 1986
Summary of ACRS 309th Meeting on 860109-11 in Washington,Dc Re Final Design Approval for Gessar II Design & Proposed Rev 3 to Reg Guide 1.63, Electric Penetration Assemblies in Containment Structures for Nuclear Power Plants
ML20205H8791986-01-22022 January 1986
Summary of Operating Reactor Events Meeting 86-02 on 860116 in Bethesda,Md Re Events Since 860106 Meeting.List of Attendees,List of Significant Elements of Events,Assignments & Status of Previous Assignments Encl
ML20141F0461985-12-30030 December 1985
Summary of Operating Reactors Events Meeting 85-28 on 851223.List of Attendees & Viewgraphs Encl
ML20205J0421985-11-21021 November 1985
Summary of ACRS 307th Meeting on 851107-09 in Washington, DC Re Review of Application of Beaver Valley Power Station 2,EPA Stds for High Level Radwaste Repository & Investigation of Significant Incidents at Power Plants
ML20136C5141985-11-11011 November 1985
Summary of Operating Reactors Event Meeting 85-21 on 851028.List of Attendees,Events Discussed & Completion Dates Assigned Encl
ML20141D3991985-11-0606 November 1985
Summary of ACRS Subcommittees on C-E Plants & Palo Verde 851105 Meeting in Washington,Dc to Review Operating Experience at Palo Verde Unit 1 in Consideration of Unit 2 License & Discuss Depressurization of C-E Plants
ML20198A4541985-10-30030 October 1985
Summary of Allegation Review Board 851029 Meeting Re Allegation RV-85-A-065.Initial Ltr Will Be Sent to Alleger Requesting Specific Safety Concerns.Allegation Will Be Considered Closed If No Response Received within 30 Days
1997-03-24
[Table view] |
Text
. . -. _ - . .-.. . . - _ .-
DISTRIBUTION-
, ,'.. June 17, 1983 Docket : File ; ' JPartlow
, s ["NRC & c Lo' al PDRs ACRS (10)
PD5 Reading NRC Parti-DOCKET N0S: 50-528, 50-529 and 50-530 GNKnighton pants MJDavis
' LICENSEE: ARIZONA PUBLIC SERVICE COMPANY OGC EJordan FACILITY: PALO VERDE NUCLEAR GENERATING STATION UNITS 1, 2 AND 3
SUBJECT:
SUMMARY
OF MEETING ON PALO VEP.DE UNIT 1 AFW PUMP DEGRADATION EVENTS A meeting was held in Rockville, Maryland on May 31, 1988, with representatives of.the licensee to discuss the evaluation of the recent failure of the auxiliary feedwater pump at Palo Verde Unit 1 and the planned actions to correct the root cause of the failure. Enclosure 1 is a copy of the briefing slides used by the licensee. Enclosure 2 is a list of meeting attendees.
SUMMARY
The licensee provided a detailed discussion of two surveillance test failures of auxiliary feedwater pumps on Unit 1 that occurred on June 1,1987, and March 25, 1988. In both cases the pumps were unable to devclop the required minimum pressure differential due to the fourth stage impeller becoming free ;
of the shaft.
The root cause of the events was determined to be hydrogen embrittlement crack-ing in an axial direction along the keyway of the center shaft. sleeve. Galling resulted in shearing of the shaft key which allowed the center shaft sleeve to !
rotate freely. The center shaft sleeve then bored into the fourth stage impeller i hub, reducing the shaft key material still holding the fourth stage impeller. '
Subsequently, impeller torque sheared the shaft key freeing the fourth stage impeller from the shaft causing the reduction in pump output. l The licensee then presented a corrective action plan of material replacements to minimize the potential for hydrogen embrittlement cracking and to reduce susceptibility to galling. The corrective actions are shown in enclosure 1.
The staff recommended performing the corrective maintenance on the pumps as soon as feasible, rather than deferring the maintenance until the next outage.
Subsequent to the meeting the licensee informed the staff that the corrective maintenance would be performed one pump at a time within the Technical Speci-fication time limits when all replacement parts are received from-the pump manufacturer.
original signed by Michael Davis Michael J. Davis, Project Manager Project Directorate Y Division of Reactor Projects - III, IV, V and Special Projects
Enclosure:
stated DRSP/PDV N' DR p PDV MJDavis:dr GW i'ghton 6/;f/88 6/ /88 8806300306 000617 PDR ADOCK 05000520 P PDR
Mr. E. E. Van Brunt, Jr.
Arizona Nuclear Power Project Palo Verde cc:
Arthur C. Gehr, Esq. Ms. Lynn Bernabei Snell & Wilmer Government Accountability Project 3100 Valley Center of the Institute for Policy Studies Phoenix, Arizona 85073 1901 Que Street, NW Washington, DC 20009 Mr. James M. Flenner, Chief Counsel Arizona Corporation Commission Mr. Charles B. Brinkman,. Manager 1200 West Washington Washington Nuclear Operations Phoenix, Arizona 85007 '
Combustion Engineering, Inc.
7910 Woodmont Avenue Suite 1310 Charles R. Kocher, Esq. Assistant Bethesda, Maryland 20814 Council James A. Boeletto, Esq.
Southern California Edison Company P. 0. Box 800 Rosemead, California 91770 Mr. Mark Ginsberg Energy Director Office of Economic Planning and Development 1700 West Washington - 5th Floor Phoenix, Arizona 85007 Mr. Wayne Shirley Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503 Mr. Tim Polich U.S. Nuclear Regulatory Commission P. O. Box 97 - Palo Verde Tonopah, Arizona 85354-0097 Regional Administrator, Region Y U. S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596
, Arizona Nuclear Power Project - 2_- Palo Verde cc:
Chairman Arizona Corporation Commission Post Office Box 6019 Phoenix, Arizona 85003 Arizona Radiation Regulatory Agency ATTil: Ms. Clara Palovic, Librarian 4814 South 40 Street Phoenix, Arizona 85040 Mr. Charles Tedford, Director Arizona Radiation Regulatory Agency 4814 South 40 Street Phoenix, Arizona 85040 Cf.3 i rman Maricopa County Board of Supervisors 111 South Third Avenue Phoenix, Arizona 85003 l
_ . . . . _ _ _ . _ _ _ _ . ~ . _ , _ . . , _ . . _ .
4 BRIEFING 0F NRC STAFF ON PVNGS AUXILIARY FEEDWATER PUMPS l
ROCKVILLE, MD l
MAY 31, 1988 l
O l
AGENDA PVNGS AUXILIARY FEEDWATER PUMPS PRESENTER
~
I. INTRODUCTION A.C. ROGERS II. DESCRIPTION OF AFW PU'!PS M.E. RAD 0CCIA III. ENGINEERING EVALUATION OF B.J. ALBERT AFW PUMP FAILURES IV. METALLURGICAL ANALYSIS RESULTS D.E. SACHS V. CORRECTIVE ACTION PLAN D.E. SACHS/
B.J. ALBERT VI. CONCLUSIONS A.C. R0GERS
l DESCRIPTION OF AFW PUMPS
ESSENTIAL, TURBINE-DRIVEN PUMP (A-TRAIN)
ESSENTIAL, MOTOR-DRIVEN PUMP (B-TRAIN)
NON-SEISMIC, MOTOR-DRIVEN PUMP (A-TRAIN)
- AFW PUMPS WERE SUPPLIED BY BINGHAM-WILLAMETTE
EIGHT STAGE PUMP
- SINGLE SUCTION
- DOUBLE VOLUTE
- HORIZONTAL, SPLIT CASING
- OPPOSED IMPELLER ARRANGEMENT RATED CAPACITY OF 1010 GPM AT 3280 FEET TDH FOR ESSENTIAL PUMPS
- NON-ESSENTIAL PUMPS HAVE A RATED CAPACITY OF 1010 GPM AT 2960 FEET TDH MER 05/31/88
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AFW PUMP DEGRADATION EVENTS
- TWO SURVEILLANCE TEST FAILURES HAVE BEEN EXPERIENCED AT PVNGS:
- UNIT 1 NON-SEISMIC, M010R-DRIVEN PUMP ON JUNE 1, 1987
~
- UNIT 1 ESSENTIAL, MOTOR-DRIVEN PUMP ON MARCH 25, 1988
- OBSERVATIONS DURING/F0LLOWING SURVEILLANCE TESTS REDUCED HEAD WHILE OPERATING ON MINI-FLOW RECIRCULATION LOOP
- TWO TROUBLE-SHOOTING RUNS ON ESSENTIAL PUMP.
TOTAL RUN TIME OF 30 MINUTES. NO INCREASED VIBRATIONS WERE OBSERVED.
- VISUAL INSPECTION OF PUMP INTERNALS:
(1) AXIAL CRACK OF CENTER SHAFT SLEEVE (2) SHAFT KEY HAD SHEARED AT SLEEVE AND AT FOURTH STAGE IMPELLER (3) CENTER SHAFT SLEEVE HAD ROTATIONAL FREEDOM (4) FOURTH STAGE IMPELLER HAD ROTATIONAL FREEDOM BJA 05/31/88
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i ENGINEERING EVALUATION
- AFW PUMP FAILURE SCENARIO (FOR AFN-P01 AND AFB-P01):
(1) CENTER STAGE SHAFa* SLEEVE DEVELOPED AXIAL CRACK (2) GALLING OF SLEEVE TO STAGE PIECE CAUSED SHEARING OF SHAFT KEY (3) CENTER SHAFT SLEEVE HAD ROTATIONAL FREEDOM (4) CENTER SHAFT SLEEVE BORED INTO THE FOURTH STAGE IMPELLER HUB (5) DUE TO METAL LOSS, IMPELLER TORQUE SHEARED THE SHAFT KEY (6) FOURTH STAGE IMPELLER WAS FREED FROM SHAFT (7) REDUCTION IN PUMP PERFORMANCE WAS OBSERVED l
i BJA 05/31/88 l
A'W PUMP - CENTER STAGE A
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~ FOURTil STAGE IMPELLER R
CENTER STAGE PIECE \
PUMP SHAFT !!!!!!!
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ENGINEERING EVALUATION (CONTINUED) l
- GALLING IS NECESSARY TO CAUSE SHAFT KEY TO SHEAR l l
- TWO POTENTIAL CAUSES OF GALLING OF CENTER STAGE SHAFT SLEEVE:
~
(1) CRACKING 0F SLEEVE CRACK ALLOWS SLEEVE TO EXPAND AND l l
REDUCE THE DIAMETRAL CLEARANCE
- GALLING IS CAUSED BY INCREASED FRICTIONAL FORCES i (2) SLEEVE CRACKING COMBINED WITH SUCTION I TRANSIENTS CRACK DOES NOT REDUCE DIAMETRAL ,
CLEARANCE ENOUGH TO CAUSE CRACKING BY ITSELF
- SUCTION FRANSIENTS (SUCH AS FULL-FLOW STARTS) LEAD TO GALLING BJA l 05/31/88 l 1
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ENGINEERING EVALUATION (CONTINUED)
- SOUTH TEXAS PROJECT FAILURE SCENARIO:
(1) AXIAL CRACK DEVELOPED IN THE THROTTLE SLEEVE (2) SHAFT SLEEVE INCREASED IN DIAMETER DUE
~
TO CRACK (3) FRICTION CAUSED WELDING OF THROTTLE SLEEVE TO BUSHING (4) ANTI-ROTATION PIN FOR BUSHING SHEARED ALLOWING BUSHING TO ROTATE INSIDE OF CASING (5) THROTTLE BUSHING GALLED THE PUMP CASING (6) GRADUAL SPEED REDUCTION WAS OBSERVED (7) PUMP WAS MANUALLY STOPPED
- ADDITIONAL OBSERVATION ON STP FAILURE:
CENTER STAGE SHAFT SLEEVE WAS CRACKED AND HAD PARTIALLY WORN INTO THE FIFTH STAGE IMPELLER HUB BJA 05/31/88
SO(ml TEXAS AFW IUMP SHAFT SLEEVE THROTTLE SHAFT SLEEVE CENTER THROITLE BUSHING STAGE PIECE CENTER
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AUXILIARY FEEDWATER PUMP
ENGINEERING EVALUATION (CONTINUED) l
- TWO SEPARATE FAILURE SCENARIOS HAVE BEEN EXPERIENCED l l
IN THE INDUSTRY -
l (1) LOSS OF THE FOURTH STAGE IMPELLER (2) WELDING OF THE THROTTLE St.EEVE TO THE THROTTLE BUSHING !
l
- BOTH FAILURE SCENARIOS ARE POSSIBLE i AT PVNGS
- CORRECTIVE ACTIONS MUST CONSIDER BOTH FAILURE SCENARIOS I
- CORRECTIVE ACTIONS MUST CONSIDER BOTH POTENTIAL CAUSES OF SLEEVE GALLING
- INITIATING EVENT FOR THE PUMP FAILURES WAS THE SLEEVE CRACK BJA 05/31/88 I
- - . - - - - ~ ~ - , - ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~ ~ ' - ~ - - - - - ~ ~ ~ - - "
METALLURGICAL ANALYSIS RESULTS
- METL PERFORMED THE FOLLOWING EXAMINATIONS (1) SCANNING ELECTRON MICROSCOPY (SEM)
(2) OPTIC,AL MICROSCOPY (3) HARDNESS MEASUREMENTS (4) ENERGY DISPERSIVE SPECTROSCOPY
- RESULTS OF EXAMINATIONS l (1) INTERGRANULAR CRACKING CONFIRMED TO BE PRESENT ACROSS THE ENTIRE FRACTURE FACE. FRACTURE INITIATED IN OR NEAR THE KEYWAY CORNER (ID).
(2) INTERGRANULAR CRACKING CONFIRMED BY OPTICAL MICROSCOPY. EVIDENCE OF CORROSION WAS NOTED IN THE AREA 0F CRACK INITIATION.
(3) MATERIAL HARDNESS IS ROCKWELL C50.5 (480 BHN)
(4) MATERIAL CONFIRMED TO BE AISI 420
- CONCLUSION = MATERIAL FAILED DUE TO HYDROGEN EMBRITTLEMENT CRACKING DES 05/31/88 l
METALLURGICAL ANALYSIS RESULTS (CONTINUED)
- INDEPENDENT METALLURGICAL ANALYSIS
- TWO LABORATORIES WERE USED (1) BECHTEL MATERIAL AND QUALITY SERVICES (2) OREGON STATE UNIVERSITY
- BOTH LABORATORIES CONCLUDED THAT THE SHAFT SLEEVE FAILED DUE TO HYDROSEN EMBRITTLEMENT
- ROOT CAUSE = HYDROGEN EMBRITTLEMENT CRACKING DES 05/31/88
CORRECTIVE ACTION PLAN l
- MINIMIZE THE POTENTIAL FOR HYDROGEN EMBRITTLEMENT CRACKING
- REDUCE SUSCEPTIBILITY TO GALLING
(1) CHANGE ROTATING PARTS TO TYPE 410 SS WITH A HARDNESS OF ROCKWELL C24-32 (250-300 BHN)
(1100 F TEMPER)
- CENTER STAGE SHAFT SLEEVE
- THROTTLE SHAFT SLEEVE
- IMPELLER WEAR RINGS (2) CHANGE STATIONARY PARTS TO NI-RESIST #2
- THROTTLE BUSHING
- CENTER STAGE PIECE
- CASE RINGS
- SERIES STAGE PIECES (3) CHANGE SHAFT KEY MATERIAL FROM 416 TO 410 SS (4) OPTIMIZE KEYWAY DESIGN DES 05/31/88
l BASIS FOR MATERIAL REPLACEMENTS (1) AISI 410 WITH 1100 F TEMPER (250-300 BHN)
- NOT AS SUSCEPTIBLE TO HYDROGEN EMBRITTLEMENT:
(1) ABILITY TO PLASTICALLY DEFORM TO PREVENT CRACK INITIATION (2) SIGNIFICANT REDUCTION IN RESIDUAL STRESSES
/
(2) NI-RESIST #2
- HIGH NICKEL CONTENT CAST IRON
- PUMP MANUFACTURER HAS EXTENSIVE EXPERIENCE WITH THIS ALLOY
- GALL RESISTANT MATERIAL (3) KEY MATERIAL - AISI 410 l l
- CHANGE FROM AISI 416 REDUCES POTENTIAL CORROSION SITES BY REDUCING THE NUMBER OF SULFIDE INCLUSIONS (4) OPTIMIZE KEYWAY DESIGN REDUCES STRESS CONCENTRATION IN KEYWAY CORNER
- DESIGN PER INDUSTRY STANDARD ANSI B17.1-1967 DES 05/31/88
. - _ _ _ _ - _ - _ _ _ - . - - - . __f
REPLACEMENT PLAN
- CURRENTLY EVALUATING IMPLEMENTATION PLAN
- MINIMIZE RISK TO THE UNITS
- WORK WITHIN VENDOR CONSTRAINTS
- REPLACEMENT PLAN WILL BE COMMUNICATED IN LER/PART 21 REPORT
- MAINTAIN ONE SPARE ROTATING ELEMENT ON-SITE AT !
ALL TIMES
- CONTINUED OPERATION OF THE PVNGS UNITS IS BASED ON THE FOLLOWING CONSIDERATIONS:
- ONLY FOURTH STAGE IMPELLER FAILURES HAVE BEEN OBSERVED AT PVNGS
- SAFETY ANALYSIS CALCULATIONS INDICATE THAT FOURTH STAGE IMPELLER FAILURES CAN BE ACCOMODATED
- LOW PROBABILITY OF AN ADDITIONAL FAILURE BETWEEN NOW AND WHEN REPLACEMENTS ARE COMPLETED BJA 05/31/88
. May 31, 1988 NAME ORGANIZATION M. Davis NRC/NRR/PDV G. Knighton NRC/NRR/PDV E.A. Licitra NRC/NRR/PDV J.S, Wermiel NRC/NRR/ DEST /SPLB Y.S.Hcang(John) NRC/NRR/ DEST /EMEB C.D. Sellers NRC/NRR/ DEST /EMTB Dan Sachs ANPP David J. Lurenzi '
ANPP Mike E. Radoccia ANPP Brad Albert ANPP Carter Rocers ANPP Ted Sullivan NRC/NRR/EMED
,
