Letter Sequence Other |
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MONTHYEARML20153E7841988-05-0404 May 1988 Forwards Results of NRC Review Concluding That Problem of Relay & Breaker Coordination Exists at Station.Reevaluation of Criteria & Associated Calculations for Breaker & Relay Coordination to Assure Proper Functioning Requested Project stage: Other ML20155K4661988-06-0808 June 1988 Advises That Util Does Not Consider Circuit Breaker Coordination to Be Safety Concern at Plant Based on Incident Cited by AEOD Not Involving Maint Configuration & Normal Operation Alignments,Per Ds Hood 880504 Request Project stage: Other ML20151F0331988-07-14014 July 1988 Provides Reevaluation of Criteria & Associated Calculations for Breaker & Relay Coordination for Electrical Sys, Clarifying Certain Statements Made in Project stage: Other 1988-06-08
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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20217H5811999-10-15015 October 1999 Forwards 1999 Update to FSAR, for McGuire Nuclear Station.With Instructions,List of Effective Pages for Tables & List of Effective Pages for Figures ML20217G7861999-10-13013 October 1999 Forwards MOR for Sept 1999 & Revised MOR for Aug 1999 for McGuire Nuclear Station,Unit 1 & 2 ML20217F3591999-10-13013 October 1999 Forwards Info Copy of Cycle 14 COLR for McGuire Nuclear Station,Unit 1 ML20217F3261999-10-13013 October 1999 Submits Quantity of Tubes Insp from Either Side of SGs A-D & Lists Tubes with Imperfections,Locations & Size.No Tubes Removed from Svc by Plugging.Total of Eleven Tubing Wear Indications Identified at Secondary Side Supports in SGs ML20217F8011999-10-13013 October 1999 Informs That on 990930,NRC Completed mid-cycle PPR of McGuire Nuclear Station.Areas That Warranted More than Core Insp Program Over Next Five Months,Not Identified.Historical Listing of Plant Issues Encl ML20217J5091999-10-0606 October 1999 Forwards Revs to Section 16.15-4.8.1.1.2.g of McGuire Selected Licensee Commitments Manual.Section Has Been Revised to Allow Testing of Portions of DG Fuel Oil Sys Every 10 Yrs ML20217C8351999-10-0505 October 1999 Communicates Correction to Info Provided During 990917 Meeting with Duke Energy & NRC Region Ii.Occupational Radiation Safety Performance Indicator Values Should Have Been Presented as 1 Instead of 0 ML20217C4471999-10-0404 October 1999 Forwards Insp Repts 50-369/99-06 & 50-370/99-06 on 990801- 0911.Determined That One Violation Occurred & Being Treated as Non-Cited Violation ML20212J2191999-10-0404 October 1999 Informs That Util 980326 Response to GL 97-06, Degradation of SG Internals Provides Reasonable Assurance That Condition of Steam Generator Internals Are in Compliance with Current Licensing Bases for Facility ML20212J7801999-10-0404 October 1999 Discusses GL 98-01 Issued by NRC on 980511 & DPC Responses for McGuire NPP & 990615.Informs That NRC Reviewed Responses & Concluded That All Requested Info Re Y2K Readiness Provided.Subj GL Considers to Be Closed ML20212M1651999-09-23023 September 1999 Refers to 990917 Meeting at Region II Office Re Licensee Presentation of self-assessment of McGuire Nuclear Station Performance.List of Attendees & Licensee Presentation Handouts,Encl ML20212D1671999-09-20020 September 1999 Forwards Exemption & SER from Certain Requirements of 10CFR50,App A,General Design Criterion 57 Re Isolation of Main Steam Branch Lines Penetrating Containment.Exemption Related to Licensee Application ML20212B6491999-09-15015 September 1999 Informs That Encl Announcement Re 990913 Application for Amend to Licenses NPF-9 & NPF-7 Forwarded to C Observer in North Carolina,For Publication ML20212D5321999-09-15015 September 1999 Informs That Duke Energy Corp Agrees to Restrict Max Fuel Rod Average Burnup to 60,000 Mwd/Mtu,In Order to Support NRC Final Approval & Issuance of Requested Amend ML20212A4131999-09-14014 September 1999 Informs That TR DPC-NE-2009P Submitted in 990817 Affidavit, Marked Proprietary,Will Be Withheld from Public Disclosure, Pursuant to 10CFR2.709(b) & Section 103(b) of Atomic Energy Act of 1954,as Amended ML20216E8791999-09-14014 September 1999 Forwards Monthly Operating Repts for Aug 1999 & Revised Monthly Operating Rept for July 1999 for McGuire Nuclear Station ML20212A0501999-09-10010 September 1999 Informs That Postponing Implementation of New Conditions Improved by RG 1.147,rev 12,acceptable Since Evaluation on Relief Based on Implementing Code Case for Duration of Insp Interval ML20212A2631999-09-0909 September 1999 Forwards Rev 25 to McGuire Nuclear Station,Units 1 & 2 Pump & Valve Inservice Testing Program, IAW 10CFR50.55a. Section 8.0 Contains Summary of Changes & Detailed Description of Changes Associated with Rev 25 ML20212A5191999-09-0808 September 1999 Requests NRC Approval for Relief from Requirements of ASME Boiler & Pressure Vessel Code,Section XI,1989 Edition,App VI,VI-2430(c) & 2440(b).Approval of 99-GO-002 Is Requested by 000301 ML20211J3671999-08-31031 August 1999 Forwards Public Notice of Application for Amend to License NPF-9 Seeking one-time Extension of Surveillance Frequency for TS SR 3.1.4.2 Beyond 25% Extension Allowed by TS SR 3.0.2 ML20211M4451999-08-30030 August 1999 Forwards Summary of Util Conclusions Re Outstanding Compliance Issue Re Staff Interpretation of TS SR 3.0.1,per Insp Repts 50-369/99-03 & 50-370/99-03,as Discussed with NRC During 990618 Meeting ML20211H1741999-08-30030 August 1999 Forwards Comments on Catawba Nuclear Station Units 1 & 2 & McGuire Nuclear Station,Units 1 & 2 Specific Reactor Vessel Info Contained in Rvid.Ltr Dtd 990107,rept ATI-98-012-T005 & Partial marked-up Rept WCAP-14995 Encl ML20211K8831999-08-26026 August 1999 Forwards Insp Repts 50-369/99-05 & 50-370/99-05 on 990620-0731.Two Violations Occurred & Being Treated as NCVs ML20211G5181999-08-24024 August 1999 Forwards SE Re second-10-yr Interval Inservice Insp Program Plan Request for Relief 98-004 for Plant,Unit 1 ML20211F2971999-08-17017 August 1999 Forwards non-proprietary & Proprietary Updated Pages for DPC-NE-2009,submitted 980722.Pages Modify Fuel Design & thermal-hydraulic Analysis Sections of DPC-NE-2009. Proprietary Page 2-4 Withheld,Per 10CFR2.790 ML20211B1121999-08-16016 August 1999 Forwards Topical Rept DPC-NE-2012, Dynamic Rod Worth Measurement Using Casmo/Simulate, Describing Results of Six Drwm Benchmark Cycles at Catawba & McGuire & Discusses Qualification to Use Drwm at Catawba & McGuire ML20210V0171999-08-13013 August 1999 Confirms Conversation Between M Cash & M Franovich on 990806 Re Mgt Meeting,Scheduled for 990917 to Present self- Assessment of Plant Performance.Meeting Will Be Held in Atlanta,Ga ML20210S2231999-08-12012 August 1999 Forwards Monthly Operating Repts for July 1999 for McGuire Nuclear Station,Units 1 & 2.Revised Rept for June 1999,encl ML20210T4511999-08-10010 August 1999 Forwards Response to NRC RAI Re 981014 Standby Nuclear Svc Water Pond Dam Audit Conducted by FERC ML20210R4311999-08-10010 August 1999 Forwards Summary Rept of Mods,Minor Mods,Procedure Changes & Other Misc Changes Per 10CFR0.59 ML20210R0031999-08-10010 August 1999 Forwards Revised TS Bases Pages to NRC for Info & Use. Editorial Changes Were Made to Correct Incorrect UFSAR Ref Number Associated with Certain Reactor Coolant Sys Pressure Isolation Valves ML20210Q3701999-08-0505 August 1999 Informs That NRC Plans to Administer Gfes of Written Operator Licensing Exam on 991006.Authorized Representative of Facility Must Submit Ltr as Listed,Thirty Days Before Exam Date in Order to Register Individuals to Take Exam ML20210H7691999-07-21021 July 1999 Submits Summary of 990715 Meeting at Facility Re Presentation of Results of Most Recent Periodic Ppr.List of Meeting Attendees Encl ML20209H1551999-07-14014 July 1999 Forwards Monthly Operating Repts for June 1999 for McGuire Nuclear Station,Units 1 & 2.Revised Rept for May 1999 Also Encl ML20210E1931999-07-13013 July 1999 Forwards Insp Repts 50-369/99-04 & 50-370/99-04 on 990509-0619.Four Violations of NRC Requirements Occurred & Being Treated as Ncv,Consistent with App C of Enforcement Policy NUREG-1431, Forwards SER Agreeing with Util General Interpretation of TS LCO 3.0.6,but Finds No Technical Basis or Guidance That Snubbers Could Be Treated as Exception to General Interpretation1999-07-0909 July 1999 Forwards SER Agreeing with Util General Interpretation of TS LCO 3.0.6,but Finds No Technical Basis or Guidance That Snubbers Could Be Treated as Exception to General Interpretation ML20209G5151999-07-0808 July 1999 Forwards Amended Pages to Annual Radioactive Effluent Release Repts, for 1997 & 1998 for McGuire Nuclear Station. Portion of Rept Was Inadvertently Omitted Due to Administrative Error,Which Has Been Corrected ML20196J9001999-07-0606 July 1999 Informs That 990520 Submittal of Rept DPC-NE-3004-PA,Rev 1, Mass & Energy Release & Containment Response Methodology, Marked Proprietary Will Be Withheld Per 10CFR2.790(b)(5) & Section 103(b) of AEA of 1954 ML20196J4381999-06-29029 June 1999 Informs That as Result of Staff Review of Util Responses to GL 92-01,rev 1,suppl 1,NRC Revised Info in Rvid & Releasing Rvid Version 2 ML20196G3721999-06-24024 June 1999 Documents Verbal Info Provided to NRR During Conference Call Re Relief Requests 98-002 & 98-003 ML20196G7461999-06-22022 June 1999 Requests Exemption from Requirements of 10CFR54.17(c) That Application for Renewed Operating License Not Be Submitted to NRC Earlier than 20 Yrs Before Expiration of Operating License Currently in Effect ML20195K3601999-06-14014 June 1999 Forwards MORs for May 1999 for McGuire Nuclear Station,Units 1 & 2 & Revised MORs for Apr 1999.Line 6 Max Dependable Capacity (Gross Mwe) on Operating Data Rept Should Be Revised to 1114 from Jan 1998 to Apr 1999 ML20195D5691999-06-0303 June 1999 Submits Ltr to Facilitate Closing of Inspector Follow Up Item 50-369,370/97-15-05,re Revising Site Drawings in UFSAR Into Summary one-line Flow Diagrams,Per NRC 990327 Telcon ML20195F1851999-06-0202 June 1999 Forwards Insp Repts 50-369/99-03 & 50-370/99-03 on 990328- 0508.Two Violations of NRC Requirements Identified & Being Treated as non-cited Violations Consistent with App C of Enforcement Policy ML20195E8771999-06-0202 June 1999 Confirms Telcon with M Cash on 990524 Re Public Meeting for 990715.Purpose of Meeting to Discuss Results of NRC Most Recent PPR ML20207D0521999-05-21021 May 1999 Informs That in Telcon on 990519 Between a Orton & Rf Aiello Arrangements Made for Administration of Initial Written Exam for McGuire Nuclear Station on 990603.Exam Will Be Administered at Catawba Simultaneously with Written Exam ML20196L1791999-05-20020 May 1999 Communicates Util Licensing Position Re Inoperable Snubbers. Licensee Has Determined That Structure of ITS Has Resulted in Certain Confusion Re Treatment of Inoperable Snubbers ML20196L1851999-05-20020 May 1999 Forwards Proprietary & non-proprietary Version of Rev 1 to TR DPC-NE-3004, Mass & Energy Release & Containment Response Methodology, Consisting of Finer Nodalization of Ice Condenser Region.Proprietary Info Withheld ML20206T4481999-05-13013 May 1999 Forwards Rev 3 to Topical Rept DPC-NE-3002-A, UFSAR Chapter 15 Sys Transient Analysis Methodology, IAW Guidance Contained in NUREG-0390 ML20206R0791999-05-13013 May 1999 Forwards Monthly Operating Repts for Apr 1999 for McGuire Nuclear Station,Units 1 & 2 & Revised Monthly Operating Repts for Mar 1999 1999-09-09
[Table view] Category:NRC TO UTILITY
MONTHYEARML20058H4551990-11-0707 November 1990 Forwards Insp Repts 50-369/90-20 & 50-370/90-20 on 901001-05 & 1101.No Violations or Deviations Noted IR 05000369/19900141990-10-17017 October 1990 Ack Receipt of 900928 Response Re Violations Noted in Insp Repts 50-369/90-14 & 50-370/90-14 ML20058B9631990-10-12012 October 1990 Advises That Liquid Samples,Spiked W/Radionuclides,Will Be Sent to Facilities for Radiochemical Analyses for Tritium, Fe-55,Sr-89 & Sr-90.Analyses Should Be Completed within 60 Days ML20058A2931990-10-10010 October 1990 Forwards Insp Repts 50-369/90-19 & 50-370/90-19 on 900924-28.No Violations or Deviations Noted ML20059M8081990-09-25025 September 1990 Approves 900820 Revised Relief Request 89-02 to Replace 20- Inch Carbon Steel Elbow W/Stainless Steel Pipe ML20059K4451990-09-17017 September 1990 Advises That Ta Reed Assigned as Project Manager for Plant ML20059L5611990-09-13013 September 1990 Forwards Insp Repts 50-369/90-17 & 50-370/90-17 on 900726-0828.Violations Noted But Not Cited ML20059K6671990-09-10010 September 1990 Forwards Insp Repts 50-369/90-15 & 50-370/90-15 on 900813- 17.Violation Noted But Not Cited ML20059K0051990-09-0505 September 1990 Forwards Exam Rept 50-369/OL-90-02 Administered on 900730- 0802 IR 05000369/19900111990-09-0505 September 1990 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-369/90-11 & 50-370/90-11 ML20058N7901990-08-0909 August 1990 Forwards Safety Evaluation Supporting Util 890213 Relief Request 89-01 Re ASME Code Section XI Hydrostatic Testing Requirements ML20058P8381990-08-0303 August 1990 Discusses 900731 Enforcement Conference Re 900626 Event at Facility Involving Inoperability of Both Emergency Generators.List of Attendees & Supporting Info Encl ML20056A5571990-08-0202 August 1990 Requests Addl Info Re DPC-NE-2004, Core Thermal-Hydraulic Methodology Using VIPRE-01 for McGuire & Catawba. Requests Response Expeditiously IR 05000369/19900091990-07-30030 July 1990 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-369/90-09 & 50-370/90-09 ML20056A5811990-07-24024 July 1990 Forwards Insp Repts 50-369/90-11 & 50-370/90-11 on 900522-0625 & Notice of Violation.Util Requested to Include in Response,Any Mgt Actions to Be Taken to Prevent Subj Event from Recurring ML20056A5171990-07-24024 July 1990 Confirms Arrangements for 900731 Enforcement Conference in Region II Ofc to Discuss Util Recent Problems Re Inoperability of Both Unit 1 Emergency Diesel Generators for Approx 26 H ML20055H4811990-07-13013 July 1990 Forwards Insp Repts 50-369/90-14 & 50-370/90-14 on 900626-0705.Violations Noted.Enforcement Conference Scheduled for 900731 to Discuss Violations ML20055H4721990-07-0303 July 1990 Ack Receipt of 900522 & 0621 Ltrs Forwarding Objectives & Scenario Package for Emergency Preparedness Exercise Scheduled for Wk of 900813 ML20059M9241990-06-13013 June 1990 Forwards NRC Performance Indicators for First Quarter 1990. W/O Encl IR 05000369/19890141989-09-22022 September 1989 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Rept 50-369/89-14 ML20248B6601989-09-22022 September 1989 Forwards Insp Repts 50-369/89-15 & 50-370/89-15 on 890605-09 & 19-23.No Violations or Deviations Noted. Attention Invited to Weaknesses Identified in Rept Re Program for Molded Case Circuit Breakers ML20248C6181989-09-20020 September 1989 Ack Receipt of 890628 Response Transmitting Description of Additions to & Deviations from Generic Emergency Response Guidelines for Plant as Requested in ML20247P4051989-09-20020 September 1989 Forwards Insp Repts 50-369/89-30 & 50-370/89-30 on 890821-24.Noncited Violation Noted ML20248D5891989-09-20020 September 1989 Ack Receipt of 890818 Response to Violations Noted in Insp Repts 50-369/89-05 & 50-370/89-05 IR 05000369/19890271989-09-19019 September 1989 Forwards Insp Repts 50-369/89-27 & 50-370/89-27 on 890814-18.Violations Noted But Not Cited ML20247G6451989-09-13013 September 1989 Ack Receipt of 890828 Request for Relief from Limiting Condition for Operation Action Statement 3.6.1.8, Annulus Ventilation Sys. Understands That One Train of Sys Returned to Svc & Both Trains Declared Operable on 890825 ML20247K1281989-09-11011 September 1989 Forwards Insp Repts 50-369/89-29 & 50-370/89-29 on 890821-25.No Violations or Deviations Noted ML20247B5711989-08-31031 August 1989 Forwards Insp Repts 50-369/89-26 & 50-370/89-26 on 890807-11.No Violations or Deviations Noted ML20246E8541989-08-23023 August 1989 Forwards Exam Repts 50-369/OL-89-01 for Units 1 & 2 Administered on 890626-30 ML20246P2411989-08-22022 August 1989 Forwards Insp Repts 50-369/89-22 & 50-370/89-22 on 890724-28.No Violations or Deviations Noted ML20246N6381989-08-21021 August 1989 Forwards Insp Repts 50-369/89-21 & 50-370/89-21 on 890707-18 & Notice of Violation ML20246D0391989-08-18018 August 1989 Forwards Insp Repts 50-369/89-20 & 50-370/89-20 on 890717-21.No Violations or Deviations Noted ML20246C9591989-08-17017 August 1989 Requests Deletion of NRC to Licensee on NRC Followup of Plant Alert Critique Action Items from Licensee Records & to Refer to 890714 Version of Ltr in Any Future Correspondence on Same Subj ML20246D0651989-08-0909 August 1989 Forwards Insp Repts 50-369/89-18 & 50-370/89-18 on 890629-0728.No Violations or Deviations Noted ML20245L3961989-08-0808 August 1989 Forwards Insp Repts 50-369/89-16 & 50-370/89-16 on 890602-28 & Notices of Violation & Deviation ML20245F4241989-08-0808 August 1989 Forwards Insp Repts 50-369/89-23 & 50-370/89-23 on 890727. Violations Noted ML20248C0561989-08-0303 August 1989 Forwards Sser Accepting 880601,0909 & 890602 Changes to ATWS Mitigation Sys Actuation Circuitry for Plants.Nrc Requested to Be Notified Upon Completion of Human Factors Review ML20248D3251989-08-0101 August 1989 Forwards Summary of Comments on Action Items Arising from Critique of Plant Alert on 890307-08,per ML20247K5901989-07-24024 July 1989 Forwards Insp Repts 50-369/89-19 & 50-370/89-19 on 890710-14.No Violations or Deviations Noted ML20247H7461989-07-18018 July 1989 Forwards Amends 100 & 82 to Licenses NPF-9 & NPF-17, Respectively & Safety Evaluation.Amends Update Pressure & Temp Limits in Tech Spec 3/4.4.9 for Heatup & Cooldown of RCS IR 05000369/19890111989-07-17017 July 1989 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-369/89-11 & 50-370/89-11 ML20236E6381989-07-17017 July 1989 Forwards Insp Repts 50-369/89-14 & 50-370/89-14 on 890422- 0601 & Notice of Violation.Corrective Actions to Address Concern Re Mgt Controls Requested ML20247D3961989-07-14014 July 1989 Forwards Summary of NRC Comments Re Action Items Arising from McGuire Alert Critique on 890307-08.Alert Critique Beneficial & Should Result in Improved Coordination of Joint Response to Future Emergency Situations ML20246Q0631989-07-13013 July 1989 Forwards Insp Repts 50-369/89-17 & 50-370/89-17 on 890605- 09.No Violations or Deviations Noted.Unresolved Item Identified ML20246K3791989-07-0707 July 1989 Ack Receipt of 890623 Response to Violations Noted in Insp Repts 50-369/89-12 & 50-370/89-12 ML20245K5941989-06-29029 June 1989 Forwards SER Accepting Licensee 831104 & 850524 Responses to Generic Ltr 83-28,Item 4.5.3, Reactor Trip Reliability - On-Line Functional Testing of Reactor Trip Sys. Technical Evaluation Rept EGG-NTA-8341 Also Encl ML20246A2951989-06-29029 June 1989 Forwards Request for Addl Info Re NRC Bulletin 88-008, Thermal Stresses in Piping Connected to Rcs ML20246C4481989-06-29029 June 1989 Forwards Safety Evaluation Granting Relief from Hydrostatic Pressure Testing Requirement of Section XI of ASME Boiler & Pressure Vessel Code,Per 880627 & 890216 Requests.Util Alternative NDE & Inservice Leak Testing Acceptable ML20246A6071989-06-26026 June 1989 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-369/89-02 & 50-370/89-02 ML20246B2271989-06-23023 June 1989 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-369/89-05 & 50-370/89-05.NRC Understands That Revised Response Addressing Weakness in Mgt Oversight Will Be Submitted 1990-09-05
[Table view] Category:OUTGOING CORRESPONDENCE
MONTHYEARML20217F8011999-10-13013 October 1999 Informs That on 990930,NRC Completed mid-cycle PPR of McGuire Nuclear Station.Areas That Warranted More than Core Insp Program Over Next Five Months,Not Identified.Historical Listing of Plant Issues Encl ML20217C4471999-10-0404 October 1999 Forwards Insp Repts 50-369/99-06 & 50-370/99-06 on 990801- 0911.Determined That One Violation Occurred & Being Treated as Non-Cited Violation ML20212J2191999-10-0404 October 1999 Informs That Util 980326 Response to GL 97-06, Degradation of SG Internals Provides Reasonable Assurance That Condition of Steam Generator Internals Are in Compliance with Current Licensing Bases for Facility ML20212J7801999-10-0404 October 1999 Discusses GL 98-01 Issued by NRC on 980511 & DPC Responses for McGuire NPP & 990615.Informs That NRC Reviewed Responses & Concluded That All Requested Info Re Y2K Readiness Provided.Subj GL Considers to Be Closed ML20212M1651999-09-23023 September 1999 Refers to 990917 Meeting at Region II Office Re Licensee Presentation of self-assessment of McGuire Nuclear Station Performance.List of Attendees & Licensee Presentation Handouts,Encl ML20212D1671999-09-20020 September 1999 Forwards Exemption & SER from Certain Requirements of 10CFR50,App A,General Design Criterion 57 Re Isolation of Main Steam Branch Lines Penetrating Containment.Exemption Related to Licensee Application ML20212B6491999-09-15015 September 1999 Informs That Encl Announcement Re 990913 Application for Amend to Licenses NPF-9 & NPF-7 Forwarded to C Observer in North Carolina,For Publication ML20212A4131999-09-14014 September 1999 Informs That TR DPC-NE-2009P Submitted in 990817 Affidavit, Marked Proprietary,Will Be Withheld from Public Disclosure, Pursuant to 10CFR2.709(b) & Section 103(b) of Atomic Energy Act of 1954,as Amended ML20212A0501999-09-10010 September 1999 Informs That Postponing Implementation of New Conditions Improved by RG 1.147,rev 12,acceptable Since Evaluation on Relief Based on Implementing Code Case for Duration of Insp Interval ML20211J3671999-08-31031 August 1999 Forwards Public Notice of Application for Amend to License NPF-9 Seeking one-time Extension of Surveillance Frequency for TS SR 3.1.4.2 Beyond 25% Extension Allowed by TS SR 3.0.2 ML20211K8831999-08-26026 August 1999 Forwards Insp Repts 50-369/99-05 & 50-370/99-05 on 990620-0731.Two Violations Occurred & Being Treated as NCVs ML20211G5181999-08-24024 August 1999 Forwards SE Re second-10-yr Interval Inservice Insp Program Plan Request for Relief 98-004 for Plant,Unit 1 ML20210V0171999-08-13013 August 1999 Confirms Conversation Between M Cash & M Franovich on 990806 Re Mgt Meeting,Scheduled for 990917 to Present self- Assessment of Plant Performance.Meeting Will Be Held in Atlanta,Ga ML20210Q3701999-08-0505 August 1999 Informs That NRC Plans to Administer Gfes of Written Operator Licensing Exam on 991006.Authorized Representative of Facility Must Submit Ltr as Listed,Thirty Days Before Exam Date in Order to Register Individuals to Take Exam ML20210H7691999-07-21021 July 1999 Submits Summary of 990715 Meeting at Facility Re Presentation of Results of Most Recent Periodic Ppr.List of Meeting Attendees Encl ML20210E1931999-07-13013 July 1999 Forwards Insp Repts 50-369/99-04 & 50-370/99-04 on 990509-0619.Four Violations of NRC Requirements Occurred & Being Treated as Ncv,Consistent with App C of Enforcement Policy NUREG-1431, Forwards SER Agreeing with Util General Interpretation of TS LCO 3.0.6,but Finds No Technical Basis or Guidance That Snubbers Could Be Treated as Exception to General Interpretation1999-07-0909 July 1999 Forwards SER Agreeing with Util General Interpretation of TS LCO 3.0.6,but Finds No Technical Basis or Guidance That Snubbers Could Be Treated as Exception to General Interpretation ML20196J9001999-07-0606 July 1999 Informs That 990520 Submittal of Rept DPC-NE-3004-PA,Rev 1, Mass & Energy Release & Containment Response Methodology, Marked Proprietary Will Be Withheld Per 10CFR2.790(b)(5) & Section 103(b) of AEA of 1954 ML20196J4381999-06-29029 June 1999 Informs That as Result of Staff Review of Util Responses to GL 92-01,rev 1,suppl 1,NRC Revised Info in Rvid & Releasing Rvid Version 2 ML20195E8771999-06-0202 June 1999 Confirms Telcon with M Cash on 990524 Re Public Meeting for 990715.Purpose of Meeting to Discuss Results of NRC Most Recent PPR ML20195F1851999-06-0202 June 1999 Forwards Insp Repts 50-369/99-03 & 50-370/99-03 on 990328- 0508.Two Violations of NRC Requirements Identified & Being Treated as non-cited Violations Consistent with App C of Enforcement Policy ML20207D0521999-05-21021 May 1999 Informs That in Telcon on 990519 Between a Orton & Rf Aiello Arrangements Made for Administration of Initial Written Exam for McGuire Nuclear Station on 990603.Exam Will Be Administered at Catawba Simultaneously with Written Exam ML20206L5631999-05-11011 May 1999 Forwards Two Documents Requesting That NRC Place on Docket 50-369 & 50-370,technical Interface Agreement 97-02 & Related Staff Evaluation ML20206N3451999-05-11011 May 1999 Forwards SE of Licensee Response to GL 96-05, Periodic Verification of Design-Basis Capability of Safety-Related Motor-Operated Valves ML20206M2121999-05-11011 May 1999 Informs That NRC Office of Nuclear Reactor Regulation Reorganized Effective 990328.As Part of Reorganization, Division of Licensing Project Mgt Created ML20206C0451999-04-23023 April 1999 Forwards Insp Repts 50-369/99-02 & 50-370/99-02 on 990214-0327.No Violations Noted ML20205Q6641999-04-15015 April 1999 Forwards Amend 10 to Indemnity Agreement B-83 for Signature & Return to Document Control Desk ML20205M6741999-04-13013 April 1999 Discusses 980318 Telcon of Licensing Bases Record Change Re Duke Energy Corp License Amend Request, & Staff Approval in Form of TS Amends 184 & 166,dtd 980930.Forwards Revised Pp to SE of 980930 ML20205T1711999-04-0909 April 1999 Informs That on 990317 Ho Christensen & a Orton Confirmed Initial Operator Licensing Exam Schedule for Y2K.Initial Exam Dates for Wks of 000508 & 22 for Approx 13 Candidates ML20205M2601999-03-25025 March 1999 Informs That NRC Completed PPR of Plant on 990201.Plant Issues Matrix & Insp Plan for Next 8 Months Encl ML20205A9371999-03-24024 March 1999 Forwards Evaluated & Final Rept from Ferc,Related to 981014 Dam Safety Audit Conducted at McGuire Nuclear Station for Category I Standby Service Water Pond Dam.List of Actions That Should Be Taken by Util to Ensure Safety of Dam,Encl ML20205H9201999-03-18018 March 1999 Forwards Exam Repts 50-369/99-301 & 50-370/99-301 on 990125- 0205.Of Eleven SRO & RO Candidates Taking Written Exam & Operating Tests,Nine Passed & Two Failed,Representing 82% Pass Rate ML20204E3221999-03-10010 March 1999 Forwards Insp Repts 50-369/99-01 & 50-370/99-01 on 990103- 0213.Non-cited Violation Noted ML20207M9091999-03-0505 March 1999 Informs That Info Submitted by Application, Marked as Proprietary Will Be Withheld from Public Disclosure Per 10CFR2.790(b)(5) & Section 103(b) of AEA of 1954,as Amended ML20203J0431999-02-16016 February 1999 Discusses Review of Plant,Units 1 & 2 IPEEE Submittal.Staff Concludes That Util IPEEE Process,Capable of Identifying Most Likely Severe Accidents & Severe Accidents Vulnerabilities.Intent of Suppl 4 to GL 88-20 Met ML20203C2411999-02-0505 February 1999 Discusses Draft Operation Insp Rept for McGuire Nuclear Station Standby Nuclear Service Water Pond Dam Conducted on 981028.Draft Rept States That Dam Appeared to Be in Good Condition & Adequately Maintained ML20203G3361999-02-0505 February 1999 Informs That NRC Plans to Administer Generic Fundamentals Exam Section of Written Operator Licensing Exam on 990407. Representative of Facility Must Submit Either Ltr Indicating No Candidates or Listing of Names of Candidates for Exam ML20202E3861999-01-28028 January 1999 Refers to GL 96-05 Issued on 960918 & DPC 980331 Updated Response to GL 96-05 Indicating Intent to Implement Provisions of JOG Program on MOV Periodic Verfication at Mcguire.Rai Re JOG Program McGuire Encl ML20199L4421999-01-25025 January 1999 Informs That by Encl Ltrs & 981223,NRC Has Responded to WOG Positions Re C/As to Address Generic Aspects of part-length CRD Mechanism Housing Issue That Originated as Result of 980123 Leak at Pings ML20203A4171999-01-22022 January 1999 Refers to 990119 Meeting Conducted in Region II Ofc for Presentation of self-assessment of McGuire Nuclear Station Performance & Future Plant Initiatives.List of Attendees & Presentation Handouts Encl ML20198Q7711999-01-0505 January 1999 Informs That Staff Review of GL 97-05, SG Tube Insp Technique, Did Not Identify Any Concerns with SG Tube Insp Techniques Employed at McGuire That Would Indicate That Util Not in Compliance with Current Licensing Bases for Plant ML20198Q7551999-01-0505 January 1999 Forwards RAI Re 980722 Request for Amend to Plant,Units 1 & 2 TSs to Permit Use of Westinghouse Fuel.Response Requested on or Before 990131 ML20199F6031998-12-23023 December 1998 Submits Summary of 981105 Training Managers Conference.List of Attendees & Matl Used in Presentation Enclosed ML20198N8771998-12-18018 December 1998 Forwards Insp Repts 50-369/98-10 & 50-370/98-10 on 981004- 1121.No Violations Noted ML20198N7001998-12-14014 December 1998 Confirms 981210 Conversation Between M Cash & E Lea Concerning Meeting Scheduled for 990119.Purpose of Meeting to Present self-assessment of Plant Performance ML20198A4221998-12-11011 December 1998 Forwards SE Accepting Licensee 980115 Request for Relief from Requirements of ASME BPV Code,Section Xi,Table IWB-2500-1,for Plant ML20196F2901998-11-23023 November 1998 Advises of Planned Insp Effort Resulting from Insp Planning Meeting Held on 981102.Details of Insp Plan for Next Four Months & Historical Listing of Plant Issues Called PIM Encl ML20196B0011998-11-23023 November 1998 Forwards Emergency Response Data Sys Implementation Documents,Which Include Data Point Library Updates for Listed Plants.Changes Should Be Made to Data Base as Soon as Possible.Without Encl ML20195J5401998-11-19019 November 1998 Forwards RAI Re GL 97-01, Degradation of Crdm/Cedm Nozzle & Other Vessel Closure Head Penetrations. Staff Requests Response to RAI by 990205 ML20196C7681998-11-13013 November 1998 Forwards Copy of Answer Key & Master Bwr/Pwr GFE Section of Written Operator Licensing Exam,Administered on 981007 by Nrc.Without Encl 1999-09-23
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1 May 4, 1988 Docket Nos.: 50-369/370 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Tucker:
SUBJECT:
CIRCUIT BREAKER COORDINATION - MCGUIRE NUCLEAR STATION, UNITS 1 AND'2 (TACS 66899 and 66900)
The NRR staff has reviewed the operating event of September 6, 1987 in which the McGuire Unit 2 reactor tripped due to overcurrent faults in an instrument air compressor motor and caused loss of power to a main turbine control system relay. The event is described in your Licensing Event Report 87-16 dated September 6, 1987. Enclosed is a report of the results of this NRC staff review, in which we conclude that a problem of relay and breaker coordination exists at the McGuiro Station. We request that you reevaluate criteria and associated calculations for breaker and relay coordination for both safety related and non-safety related electrical systems' protective devices to assure .
proper functioning (i.e., isolation of only that portion of the system in which the abnormality occurs).
During the course of this NRR review, the September 6, 1987 event was also examined by the NRC's Diagnostic Evalestion Team and discussed in paragraph 3.5.6.2 of their report forwarded to you April 8,1988. NRR's request for reevaluation has been derived with the benefit of the Diagnostic Evaluation Team's recent report and is not altered by it.
Please advise me of your intentions and schedule for the reevaluation within 30 days of receipt of this letter. Your calculations and coordination curves, ,
once completed, should be maintained in a form available for staff audit.
Sincerely, 8805100107 880504 Original signed by:
PDR ADOCK 05000369 I PDR Darl S. Hood, Project Manager Project Directorate 11-3 .
j Division of Reactor Projects - I/li I r
l
Enclosure:
DISTRIBUTION:
As stated 55HETUi7 H. Rood P0li-3 R/F NRC POR 0. Hood McGuire R/F cc: Local POR OGC-WF See next page S. Varga E. Jordan G. Lainas J. Partlow
- 0. Matthews sACRS (10)
%4 T PM:POIl-3 -3 Nd66LAfphi-3 DHood:pw tthews g/,J/88 g/J/88 /q/88 l l - -. . - ---. . . . - - -_ _.
N Mr. H. B. Tucker Duk Power Company McGuire Nuclear Station cc:
Mr. A.V. Carr, Esq. Dr. John M. Barry Duke Power Company Department of Environmental Health P. O. Box 33189 Mecklenburg County 422 South Church Street 1200 Blythe Boulevard Charlotte, North Carolina 28242 Charlotte, North Carolina 28203 County Manager of Mecklenburg County Mr. Dayne H. Brown, Chief 720 East Fourth Street Radiation Protection Branch Charlotte, llorth Carolina 28202 Division of Facility Services Department of Human Resources 701 Barbour Drive Mr. Robert Gill Raleigh, North Carolina 27603-2008 Ouk Power Company Nuclear Production Department P. O. Box 33189 Charlotte, North Carolina 28242 J. Michael McGarry. III, Esq.
Bishop, Liberman, Cook, Purcell and Reynolds 1200 Seventeenth Street, N.W.
Washington, D. C. 20036 Senior Resident inspector c/o U.S. Nuclear Regulatory Commission Route 4, Box 523 Hunterville, North Carolina 28078 Regional Administrator, Region 11 U.S. Nuclear Regulatory Commission, 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323 S. S. Kilborn Area Hanager, Mid-South Area ESSO Projects Westinghouse Electric Corporation HNC West Tower - Bay 239 P. O. Box 355 Pittsburgh, Pennsylvania 15230
i EfjCLOSURE1 _
NRR EVALUATION OF CIRCUIT EREIRER CDDRDINATION
--- DURE POWER CORPAF---
BCGUTRE T W --
DOCkETN05-~5D3{9G70
1.0 INTRODUCTION
Auxiliary power panelboard KX8 requires an uninterruptible power supply which normally receives power from a 125V de auxiliary control battery through a static i inverter. An alternate power supply tc panelboard KXB is provided from a regulated 120 VAC power supply which receives its power from the 600V shared NCC. Instrument air compressor 'A' also receives its power from the same shared NCC.
i On September 4, 1987, the static inverter was taken out for maintenance and the panelboard was being powered from the regulated alternate power supply. On September 6,1987, the operator started compressor ' A' to verify proper operation i after maintenance work on the compressor. A fault on the compressor motor tripped l the compressor motor feeder breaker and the incoming feeder breaker to the 600V MCC. l On the loss of power to panelboard KXB, DEH turbine control system closed the main turbine throttle, governor and intercept valves. The reactor tripped on high l pressurizer pressure signal which caused an immediate turbine trip.
2.0 MAGATI,0N The licensee investigated and determined that the insulating tape on the connecting l l
lug of one of the motor leads in the motor junction box had worn through and the l
- connecting lug grounded out on the n.ittel frame of the motor. This short to ground i caused the 600V motor feeder breaker and the incoming feeder breaker for 600V HCC I to trip.
II The frame size of the circuit breaker supplying power to the compressor is 400 amps with long time trip setting at 225 amps. The instantaneous trip setting
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shown on the coordination curve was 1400 amps while the "as found" trip setting on the breaker was 2000 amps. The long line element of the incoming feeder breaker for the 600Y MCC was set at 700 amps with the instantaneous trip setting ct 3000 amps. The full load current of the compressor is 134.8 amps. A size 5 starter was used which has a thermal overload trip setting of 205 amps.
In its review of the calculations and the coordination curves provided by the licensee, the staff has evaluated the following:
In order to assure proper sequential isolation of electrical eouipment from over-load and short circuit conditiens, it is necessary to set protective devices such that proper selectivity is provided with protective devices upstream. Selective tripping is the application of protective devices in series so that, of the pro-tective devices carrying fault current, only the one nearest the fault opens and isolates the faulted circuit from the system. It is obvious that such selectivity i becomes more important with the devices that are closest to the power source, as the portion of the system affected becomes greater. Therefore, it is especially desirable to provide selectivity between incoming breaker and motor feeder breakers.
Integral-horsepower trotors up to 200 horsepower manufactured in accordance with NEMA standards will have a service factor of 1.15. The thermal overload (TOL) relay element is usually set at 1.33 x full load current (FLC) when the service factor is 1.15 for a combination starter. Because a TOL relay operates considerably slower than a direct-trip long time element, the TOL relay can be set for a lower pickup and will not operate unnecessarily for overcurrents created by brief periods of undervoltage. The instantaneous trip setting is theoretically 1.6 times the locked rotor current but is set at twice the locked rotor current. In the event that the MCCB instantanesus element fails to trip, the TOL relay should back up the protection, and should provide a trip. In the event of performance failure by either primary protective device, the backup action of the incoming feeder breaker long time and instantaneous trips should operate.
6 in the light of the above mentioned criteria, the trip settings of the devices should have been as follows:
- 1) TOL of the combination starter = 1.33 x FLC with a Service factor of 1.15 = 1.33 x 134.5 = 178 amps TOL of the starter should have been set at 175 amps but was erroneously set at 205 amps. In order to provide adequate protection for the motor, it should be set above the motor accelerating curve but below the motor thermal capability curve.
- 2) instantaneous trip setting of the = 2 x LRC of the compressor motor breaker feeding to the compressor = 2 x 773 = 1540 arnps instantaneous trip setting of the breaker feeding to the compressor should have been set at 1540 amps instead of "as found" trip setting of 2000 amps.
- 3) long time element of the breaker feeding to the compressor should have been set below the motor thermal capability curve but was erroneously set at 225 amps which is above the therual capability curve.
- 4) Long time element of the incoming breaker feeding to the 600V motor control center should be set above the locked rotor current of the largest motor on the bus plus the total load on the bus minus the full load current of the largest motor on the bus = 773 + 264.5 - 134.5 = 903 amps.
Long time element of the incoming breaker should have been set at 903 amps but was erroneously set at 680 amps,
- 5) The licensee had not shown the motor accelerating curve and the motor thermal capability curve without which it would be impossible to draw the rest of the curves and coordinate them. Since the compressor motor is non-Class IE, the motor accelerating curve shculd be plotted at 80% voltages as well as 100%.
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3.0 CONCLUSION
We have reviewed the licensee's event report and the submittal and have concluded that the problem of the relay and breaker coordination exists at McGuire 182. l We recommend that the licensee should reevaluate criteria and the calculations for breaker and relay coordination for safety related Class IE as well as non-safety ,
related electrical systems protective devices so as to isolate only that portion of the system where the abnormality occurs. The calculations and the coordination curves should be available at site for staff's audit.
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