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Category:CORRESPONDENCE-LETTERS
MONTHYEARML17313B0991999-10-14014 October 1999 Forwards LER 99-005-00 Reporting Findings & Corrective Actions Taken as Result of Out of Tolerance MSSV Condition in Unit 1 Which Was Discovered During pre-outage Testing ML17313B0881999-10-12012 October 1999 Forwards Response to NRC 990831 RAI Re Several Relief Requests That Accompanied Second ten-yr Interval ISI Program Submitted on 980317.Revised Relief Request 6 Is Provided in Encl 2 ML17300B3501999-09-29029 September 1999 Forwards Revised Bases Pages,Providing Addl Discussion of Options Available to Exit Required Action G of TS 3.8.1 & Revised Page for TS 3.3.7,in Response to NRC RAI Re Proposed Amend to TS 3.8.1 & 3.3.7 ML17300B3551999-09-28028 September 1999 Responds to Aministrative Ltr 99-03, Preparation & Scheduling of Operator Licensing Exams. Proposed Palo Verde Operator Licensing Exam Schedule & Estimated Number of Applicants Planning to Take Exams Encl ML17313B0851999-09-24024 September 1999 Requests Approval of Alternative to Repair Requirements of 10CFR50.55a,authorizing Alternative Use of Mechanical Nozzle Seal Assemblies,As Described in Encl,For RCS Hot Leg Instrumentation & Sampling Nozzles for Two Operating Cycles ML17313B0781999-09-20020 September 1999 Forwards Rev 22 to PVNGS Emergency Plan. Summary Description of Changes,Included ML17300B3331999-09-14014 September 1999 Forwards MOR for August 1999 & Revised MOR for Jul 1999 for Pvngs,Units 1,2 & 3 ML17300B3351999-09-0808 September 1999 Informs That Repairs to Plant EDG 2A Jacket Water Cooling sub-sys Were Completed & EDG Was Declared Operable on 990903 at Approx 21:45 Mst.Noed Was Not Necessary,Since 72 Hour Completion Time Was Met ML17313B0761999-09-0303 September 1999 Requests Enforcement Discretion to TS Section 3.8.1, AC Sources - Operating. Enforcement Discretion Would Allow,On One Time Basis,Extension of Completion Time in Required Action B.4 of TS 3.8.2 from 72 H to 108 H ML17313B0731999-08-31031 August 1999 Informs That RR Bean (License OP-50452-1) Has Been Permanently Reassigned to Position That Does Not Require License & Requests That Individuals License Be Expired Per 10CFR55.55 ML20211A9501999-08-12012 August 1999 Discusses 990720-21 Workshop Conducted in Region IV Ofc,Re Exchange of Info in Area of Use of Risk Insights in Regulatory Activities.List of Attendees,Summary of Topic & Issues,Agenda & Copies of Handouts Encl ML17313B0581999-08-0606 August 1999 Forwards Rev 1 of Changes to TS Bases Implemented Between Aug 1998 & Jul 1999.Insertion Instructions & List of Affected Pages Included ML17313B0311999-08-0303 August 1999 Submits Response to NRC AL 99-02, Operating Reactor Licensing Actions Estimates, for Fys 2000 & 2001 ML20210L1461999-08-0303 August 1999 Informs That NRC Plans to Administer Gfes of Written Operator Licensing Exam on 991006.Requests Submittal of Ltr Identifying Individuals Taking Exam,Personnel Allowed Access to Exams & Mailing Address for Exams ML17313B0431999-07-30030 July 1999 Advises of Listed Senior Mgt Changes That Have Taken Place at Plant ML17313B0441999-07-30030 July 1999 Forwards Comments on Draft NRC Repts Evaluation of AOVs at Us Light-Water Reactors (1999) & Idaho Natl Engineering & Environ Lab Rept (INEEL)EXT-98-00383,Study of AOVs in Npps. ML17313B0151999-07-20020 July 1999 Submits Request to Obtain All Data Previously Sent by PVNGS & Currently in REIRS for OLs NPF-41,NPF-51 & NPF-74.Data Is Requested in Electronic Form (Ascii Format) as It Currently Exists in REIRS Sys ML17313B0091999-07-20020 July 1999 Forwards Requested Calculations Performed to Verify That Increase in Max Radially Averaged Enrichment for Fuel Assemblies from 4.3 Weight Percent to 4.8 Weight Percent Did Not Affect Requirements for TSs 3.7.15,3.7.17 & 4.3.1 ML17313B0171999-07-16016 July 1999 Forwards LER 99-005-00,re Automatic Rt Which Occurred on 990618,following Sensor Failure in Core Protection Calculators.Corrective Actions Described in LER Are Not Necessary to Maintain Compliance with Regulations ML17300B3111999-07-15015 July 1999 Forwards PVNGS Unit 2 ISI Rept for Eighth Refueling Outage. No Commitments Made to NRC by Ltr ML17300B3141999-07-15015 July 1999 Forwards Corrected Electronic Files for Individual Monitoring Repts for 1998.Original Electronic Files Were Found to Have Two Administrative Errors,Which Has Been Corrected.Encl Withheld,Per 10CFR2.790 ML20209G6771999-07-0808 July 1999 Forwards Supplemental Info to Confirm That Decommissioning Funding Plans of Public Service Co of Nm for Interests in PVNGS Have Been Reviewed by Nm Public Regulation Commission. Final Order & Recommended Decisions in Case 2742,also Encl ML17300B2931999-07-0202 July 1999 Submits Withdrawal of Relief 5 for Second ISI Interval for Units 1,2 & 3.Proposed Alternative Is Related to Exam Requirements for Component Supports for Second ISI Interval ML17313A9951999-06-26026 June 1999 Provides Response to NRC GL 98-01,Suppl 1, Y2K Readiness of Computer Sys at Nuclear Power Plants. ML17300B2831999-06-26026 June 1999 Requests NRC Approval of Proposed Alternative IAW Provisions of 10CFR50.55a(a)(3)(i) to 10CFR50.55a(g) & Requirements of ASME Boiler & Pressure Vessel Code Section XI for Repairs & Installation.Description of Proposed Alternative,Encl ML17313A9901999-06-15015 June 1999 Forwards Response to RAI Re GL 96-05, Periodic Verification of Design-Basis Capability of Safety-Related Movs. No Commitments Being Made to NRC by Ltr ML17313A9521999-05-24024 May 1999 Notifies NRC That Ja Proctor,License SOP-50314,has Been Permanently Reassigned to Position That Does Not Require License.License Should Be Expired,Per 10CFR55.55 ML20206Q3111999-05-18018 May 1999 Final Response to FOIA Request for Documents.Forwards App a Records Being Released in Entirety ML17313A9311999-05-13013 May 1999 Notifies NRC That Rev 2 to COLR for Unit 2 Remains Applicable Following Recently Completed Unit 2 Reload ML17313A9481999-05-12012 May 1999 Informs of Change Needed in Order to Update Current Mailing List.Future Mailings for J Horne Should Be Forwarded to Listed Address ML17313A9261999-05-0707 May 1999 Forwards LER 99-004-00,per 10CFR50.73.LER Repts Findings & Corrective Actions Taken as Result of Unit 2 Out of Tolerance Pressurizer Safety Valve (Psv) Condition Which Was Discovered During Outage Testing ML20206H1931999-05-0303 May 1999 Forwards 1998 Annual Rept, for SONGS Units 2 & 3 & PVNGS Units 1,2 & 3.SCEs Form 10K Annual Rept to Securites & Exchange Commission for Fiscal Yr Ending 981231,encl ML17313A9091999-04-30030 April 1999 Forwards Proprietary Proposed Test Outlines for Initial License Exams to Be Administered at PVNGS in Aug/Sept 1999. No Commitments Are Contained in Ltr.Proprietary Info Withheld ML17313A9181999-04-30030 April 1999 Forwards Electronic File of Individual Monitoring Repts for 1998.Encl Withheld Per 10CFR2.790 ML17313A9191999-04-30030 April 1999 Forwards Special Rept 2-SR-99-001 Re SG Tube Plugging in PVNGS Unit 2,per TS Reporting Requirement 5.6.8.Complete Results of SG Tube Inservice Insp Will Be Submitted by 000422 ML17300B3751999-04-23023 April 1999 Forwards LER 99-003-00,reporting Condition Prohibited by TS 3.7.17 Where Spent Fuel Assembly Was Stored in Inappropriate Region in Spent Fuel Pool ML17313A9081999-04-23023 April 1999 Documents 990421 Telcon with E Emeigh,Which Requested Extension for Submitting Next Matl Balance Rept for Pvngs,As Required by 10CFR70.53 & 74.13.Required Info Will Be Submitted by 990531 ML20205T7421999-04-21021 April 1999 Forwards Partially Withheld Insp Repts 50-528/99-05, 50-529/99-05 & 50-530/99-05 on 990322-26.Determined That Security Program Properly Implemented.Insp Repts Details Withheld (Ref 10CFR73.21) ML17313B0271999-04-21021 April 1999 Forwards Proprietary Epec Pro Forma Cashflow Statement for 1999.Proprietary Info Withheld,Per 10CFR2.790.Affidavit Encl ML17313A9031999-04-21021 April 1999 Forwards Rev to Relief Request 12 Submitted 990420 to Second 10-yr ISI Interval.Revised Relief Request Discusses in More Detail Actions APS Will Take When There Is Identified Leakage from Bolted Connection ML17313A8971999-04-20020 April 1999 Requests Use of Alternatives to 10CFR50.55a(g) Inservice Insp Requirements.Proposed Alternatives Are Related to Visual Exam of Bolted Connections 05000529/LER-1999-002, Forwards LER 99-002-00 Re Findings & Corrective Actions Taken as Result of Plant Out of Tolerance MSSV Condition Which Was Discovered During pre-outage Testing1999-04-19019 April 1999 Forwards LER 99-002-00 Re Findings & Corrective Actions Taken as Result of Plant Out of Tolerance MSSV Condition Which Was Discovered During pre-outage Testing ML17313A8931999-04-14014 April 1999 Forwards LER 99-003,reporting Condition Prohibited by TSs That Existed When Surveillance Requirement to Verify Essential Chilled Water Sys Valve Positions Was Not Met ML20205Q0821999-04-13013 April 1999 Forwards Second ISI Interval Relief Request 10 from ASME Section XI & Applicable Addenda Re Visual Exams Performed Subsequent to Repair or Replacement of Component or Alteration of Item ML17313A8901999-04-13013 April 1999 Forwards LER 98-003-01 Re MSSV as-found Lift Pressures out- Side of TS Limits.Ler Suppl Provides Evaluation Findings from Unit 3 out-of-tolerance MSSVs Conditions Which Were Discovered During pre-outage Testing ML17313A8831999-04-0808 April 1999 Forwards 1998 Annual Radioactive Effluent Release Rept for Pvngs,Units 1,2 & 3 & Rev 13 to ODCM, for Pvngs,Units 1,2 & 3 IAW TS 5.6.3 ML20205F3491999-03-30030 March 1999 Forwards Proprietary & non-proprietary Info Re Status of Decommissioning Funding for Pvngs,Units 1,2 & 3,per 10CFR50.75(f)(1).Proprietary Info Withheld,Per Requirements of 10CFR2.790(b)(1) ML17313A8671999-03-24024 March 1999 Submits Info Re Present Levels & Sources of Property Insurance Maintained for Pvngs,Per 10CFR50.54(w)(3) ML17313A8601999-03-16016 March 1999 Forwards Revised Relief Requests PRR-05,PRR-06 & PRR-11 to Clarify That Proposed Design Flow Testing for Lpsi,Hpsi & Containment Spray Pumps Will Be Performed Using Instruments That Comply with Code Requirements,Per 990226 Telcon ML17313A8551999-03-0505 March 1999 Requests Proposed Code Alternative IAW 10CFR50.55a(e)(3),as Acceptable Alternative to Requirements of 10CFR50.55a(e)(1), for Installation of in-line safety-related Flow Measurement Instrument in ASME Class 3 Pipe 1999-09-08
[Table view] Category:INCOMING CORRESPONDENCE
MONTHYEARML17313B0991999-10-14014 October 1999 Forwards LER 99-005-00 Reporting Findings & Corrective Actions Taken as Result of Out of Tolerance MSSV Condition in Unit 1 Which Was Discovered During pre-outage Testing ML17313B0881999-10-12012 October 1999 Forwards Response to NRC 990831 RAI Re Several Relief Requests That Accompanied Second ten-yr Interval ISI Program Submitted on 980317.Revised Relief Request 6 Is Provided in Encl 2 ML17300B3501999-09-29029 September 1999 Forwards Revised Bases Pages,Providing Addl Discussion of Options Available to Exit Required Action G of TS 3.8.1 & Revised Page for TS 3.3.7,in Response to NRC RAI Re Proposed Amend to TS 3.8.1 & 3.3.7 ML17300B3551999-09-28028 September 1999 Responds to Aministrative Ltr 99-03, Preparation & Scheduling of Operator Licensing Exams. Proposed Palo Verde Operator Licensing Exam Schedule & Estimated Number of Applicants Planning to Take Exams Encl ML17313B0851999-09-24024 September 1999 Requests Approval of Alternative to Repair Requirements of 10CFR50.55a,authorizing Alternative Use of Mechanical Nozzle Seal Assemblies,As Described in Encl,For RCS Hot Leg Instrumentation & Sampling Nozzles for Two Operating Cycles ML17313B0781999-09-20020 September 1999 Forwards Rev 22 to PVNGS Emergency Plan. Summary Description of Changes,Included ML17300B3331999-09-14014 September 1999 Forwards MOR for August 1999 & Revised MOR for Jul 1999 for Pvngs,Units 1,2 & 3 ML17300B3351999-09-0808 September 1999 Informs That Repairs to Plant EDG 2A Jacket Water Cooling sub-sys Were Completed & EDG Was Declared Operable on 990903 at Approx 21:45 Mst.Noed Was Not Necessary,Since 72 Hour Completion Time Was Met ML17313B0761999-09-0303 September 1999 Requests Enforcement Discretion to TS Section 3.8.1, AC Sources - Operating. Enforcement Discretion Would Allow,On One Time Basis,Extension of Completion Time in Required Action B.4 of TS 3.8.2 from 72 H to 108 H ML17313B0731999-08-31031 August 1999 Informs That RR Bean (License OP-50452-1) Has Been Permanently Reassigned to Position That Does Not Require License & Requests That Individuals License Be Expired Per 10CFR55.55 ML17313B0581999-08-0606 August 1999 Forwards Rev 1 of Changes to TS Bases Implemented Between Aug 1998 & Jul 1999.Insertion Instructions & List of Affected Pages Included ML17313B0311999-08-0303 August 1999 Submits Response to NRC AL 99-02, Operating Reactor Licensing Actions Estimates, for Fys 2000 & 2001 ML17313B0441999-07-30030 July 1999 Forwards Comments on Draft NRC Repts Evaluation of AOVs at Us Light-Water Reactors (1999) & Idaho Natl Engineering & Environ Lab Rept (INEEL)EXT-98-00383,Study of AOVs in Npps. ML17313B0431999-07-30030 July 1999 Advises of Listed Senior Mgt Changes That Have Taken Place at Plant ML17313B0151999-07-20020 July 1999 Submits Request to Obtain All Data Previously Sent by PVNGS & Currently in REIRS for OLs NPF-41,NPF-51 & NPF-74.Data Is Requested in Electronic Form (Ascii Format) as It Currently Exists in REIRS Sys ML17313B0091999-07-20020 July 1999 Forwards Requested Calculations Performed to Verify That Increase in Max Radially Averaged Enrichment for Fuel Assemblies from 4.3 Weight Percent to 4.8 Weight Percent Did Not Affect Requirements for TSs 3.7.15,3.7.17 & 4.3.1 ML17313B0171999-07-16016 July 1999 Forwards LER 99-005-00,re Automatic Rt Which Occurred on 990618,following Sensor Failure in Core Protection Calculators.Corrective Actions Described in LER Are Not Necessary to Maintain Compliance with Regulations ML17300B3111999-07-15015 July 1999 Forwards PVNGS Unit 2 ISI Rept for Eighth Refueling Outage. No Commitments Made to NRC by Ltr ML17300B3141999-07-15015 July 1999 Forwards Corrected Electronic Files for Individual Monitoring Repts for 1998.Original Electronic Files Were Found to Have Two Administrative Errors,Which Has Been Corrected.Encl Withheld,Per 10CFR2.790 ML20209G6771999-07-0808 July 1999 Forwards Supplemental Info to Confirm That Decommissioning Funding Plans of Public Service Co of Nm for Interests in PVNGS Have Been Reviewed by Nm Public Regulation Commission. Final Order & Recommended Decisions in Case 2742,also Encl ML17300B2931999-07-0202 July 1999 Submits Withdrawal of Relief 5 for Second ISI Interval for Units 1,2 & 3.Proposed Alternative Is Related to Exam Requirements for Component Supports for Second ISI Interval ML17313A9951999-06-26026 June 1999 Provides Response to NRC GL 98-01,Suppl 1, Y2K Readiness of Computer Sys at Nuclear Power Plants. ML17300B2831999-06-26026 June 1999 Requests NRC Approval of Proposed Alternative IAW Provisions of 10CFR50.55a(a)(3)(i) to 10CFR50.55a(g) & Requirements of ASME Boiler & Pressure Vessel Code Section XI for Repairs & Installation.Description of Proposed Alternative,Encl ML17313A9901999-06-15015 June 1999 Forwards Response to RAI Re GL 96-05, Periodic Verification of Design-Basis Capability of Safety-Related Movs. No Commitments Being Made to NRC by Ltr ML17313A9521999-05-24024 May 1999 Notifies NRC That Ja Proctor,License SOP-50314,has Been Permanently Reassigned to Position That Does Not Require License.License Should Be Expired,Per 10CFR55.55 ML17313A9311999-05-13013 May 1999 Notifies NRC That Rev 2 to COLR for Unit 2 Remains Applicable Following Recently Completed Unit 2 Reload ML17313A9481999-05-12012 May 1999 Informs of Change Needed in Order to Update Current Mailing List.Future Mailings for J Horne Should Be Forwarded to Listed Address ML17313A9261999-05-0707 May 1999 Forwards LER 99-004-00,per 10CFR50.73.LER Repts Findings & Corrective Actions Taken as Result of Unit 2 Out of Tolerance Pressurizer Safety Valve (Psv) Condition Which Was Discovered During Outage Testing ML20206H1931999-05-0303 May 1999 Forwards 1998 Annual Rept, for SONGS Units 2 & 3 & PVNGS Units 1,2 & 3.SCEs Form 10K Annual Rept to Securites & Exchange Commission for Fiscal Yr Ending 981231,encl ML17313A9191999-04-30030 April 1999 Forwards Special Rept 2-SR-99-001 Re SG Tube Plugging in PVNGS Unit 2,per TS Reporting Requirement 5.6.8.Complete Results of SG Tube Inservice Insp Will Be Submitted by 000422 ML17313A9181999-04-30030 April 1999 Forwards Electronic File of Individual Monitoring Repts for 1998.Encl Withheld Per 10CFR2.790 ML17313A9091999-04-30030 April 1999 Forwards Proprietary Proposed Test Outlines for Initial License Exams to Be Administered at PVNGS in Aug/Sept 1999. No Commitments Are Contained in Ltr.Proprietary Info Withheld ML17313A9081999-04-23023 April 1999 Documents 990421 Telcon with E Emeigh,Which Requested Extension for Submitting Next Matl Balance Rept for Pvngs,As Required by 10CFR70.53 & 74.13.Required Info Will Be Submitted by 990531 ML17300B3751999-04-23023 April 1999 Forwards LER 99-003-00,reporting Condition Prohibited by TS 3.7.17 Where Spent Fuel Assembly Was Stored in Inappropriate Region in Spent Fuel Pool ML17313B0271999-04-21021 April 1999 Forwards Proprietary Epec Pro Forma Cashflow Statement for 1999.Proprietary Info Withheld,Per 10CFR2.790.Affidavit Encl ML17313A9031999-04-21021 April 1999 Forwards Rev to Relief Request 12 Submitted 990420 to Second 10-yr ISI Interval.Revised Relief Request Discusses in More Detail Actions APS Will Take When There Is Identified Leakage from Bolted Connection ML17313A8971999-04-20020 April 1999 Requests Use of Alternatives to 10CFR50.55a(g) Inservice Insp Requirements.Proposed Alternatives Are Related to Visual Exam of Bolted Connections 05000529/LER-1999-002, Forwards LER 99-002-00 Re Findings & Corrective Actions Taken as Result of Plant Out of Tolerance MSSV Condition Which Was Discovered During pre-outage Testing1999-04-19019 April 1999 Forwards LER 99-002-00 Re Findings & Corrective Actions Taken as Result of Plant Out of Tolerance MSSV Condition Which Was Discovered During pre-outage Testing ML17313A8931999-04-14014 April 1999 Forwards LER 99-003,reporting Condition Prohibited by TSs That Existed When Surveillance Requirement to Verify Essential Chilled Water Sys Valve Positions Was Not Met ML20205Q0821999-04-13013 April 1999 Forwards Second ISI Interval Relief Request 10 from ASME Section XI & Applicable Addenda Re Visual Exams Performed Subsequent to Repair or Replacement of Component or Alteration of Item ML17313A8901999-04-13013 April 1999 Forwards LER 98-003-01 Re MSSV as-found Lift Pressures out- Side of TS Limits.Ler Suppl Provides Evaluation Findings from Unit 3 out-of-tolerance MSSVs Conditions Which Were Discovered During pre-outage Testing ML17313A8831999-04-0808 April 1999 Forwards 1998 Annual Radioactive Effluent Release Rept for Pvngs,Units 1,2 & 3 & Rev 13 to ODCM, for Pvngs,Units 1,2 & 3 IAW TS 5.6.3 ML20205F3491999-03-30030 March 1999 Forwards Proprietary & non-proprietary Info Re Status of Decommissioning Funding for Pvngs,Units 1,2 & 3,per 10CFR50.75(f)(1).Proprietary Info Withheld,Per Requirements of 10CFR2.790(b)(1) ML17313A8671999-03-24024 March 1999 Submits Info Re Present Levels & Sources of Property Insurance Maintained for Pvngs,Per 10CFR50.54(w)(3) ML17313A8601999-03-16016 March 1999 Forwards Revised Relief Requests PRR-05,PRR-06 & PRR-11 to Clarify That Proposed Design Flow Testing for Lpsi,Hpsi & Containment Spray Pumps Will Be Performed Using Instruments That Comply with Code Requirements,Per 990226 Telcon ML17313A8551999-03-0505 March 1999 Requests Proposed Code Alternative IAW 10CFR50.55a(e)(3),as Acceptable Alternative to Requirements of 10CFR50.55a(e)(1), for Installation of in-line safety-related Flow Measurement Instrument in ASME Class 3 Pipe ML17313A8241999-02-23023 February 1999 Advises That Kp Jarvis,License OP-50287-1,no Longer Needs to Maintain License as Permanently Assigned to Position Requiring No License ML17313A8111999-02-18018 February 1999 Forwards PVNGS Unit 3 7th Refueling Outage, Which Provides Complete Results of SG Tube Inservice Insp Performed,Per TS 5.6.8 ML17313A8721999-02-16016 February 1999 Discusses Resolution of Generic Safety Issue 171, ESF Failures from Loss-of-Offsite Power Subsequent to Loca. Util Has Low Vulnerability to Loca/Grid Collapse/Loop Scenario ML17313A7611999-01-22022 January 1999 Forwards PVNGS Unit 3 Inservice Insp Rept Seventh Refueling Outage, Per 10CFR50.55a.Ltr Contains No New Commitments 1999-09-08
[Table view] Category:UTILITY TO NRC
MONTHYEARML17305B0681990-09-17017 September 1990 Forwards Response to Generic Ltr 90-07, Operator Licensing Natl Exam Schedule. Exam Dates,Anticipated Number of Candidates & Requalification Exam Schedules for FY91-FY94 Also Encl ML17305B0491990-09-12012 September 1990 Forwards Palo Verde Nuclear Generating Station Unit 2 Steam Generator Eddy Current Exam,Second Refueling Outage Apr 1990. ML17305B0281990-08-27027 August 1990 Forwards fitness-for-duty Semiannual Performance Rept for Period of Jan-June 1990,per 10CFR26.71(d) ML17305B0111990-08-15015 August 1990 Responds to Request for Addl Info Re Emergency Lighting,Per Insp Repts 50-528/90-25,50-529/90-25 & 50-530/90-25. Availability Info Provided in Ref 2,most Appropriate Analysis of Lighting Sys Availability ML17305B0021990-08-0909 August 1990 Provides Update on Status of Record 546 post-restart Item, Per 900412 Ltr.Record Will Revise Procedures for Analyzing & Disseminating Incident Investigation,Operations & Maint Experience to Appropriate Dept ML17305A9871990-08-0303 August 1990 Forwards Rev 1 to Abb Impell Rept 01-1658-1815, Emergency Lighting Independent Review, Per Insp Repts 50-528/90-25, 50-529/90-25 & 50-530/90-25 ML17305A9791990-07-31031 July 1990 Forwards, Conceptual Design for Palo Verde Nuclear Generating Station for Diverse Auxiliary Feedwater Actuation Sys (Dafas) for Review.Schedule of Implementation as Indicated ML20056A4161990-07-31031 July 1990 Forwards Revised Security Plan Implementing Procedures.Encl Withheld (Ref 10CFR2.790) ML17305A9831990-07-27027 July 1990 Requests Temporary Waiver of Compliance from Limiting Condition for Operation 3.6.3 to Allow Corrective Maint to Be Performed on Main Feedwater Isolation Valves by Extending Allowed Outage Time to 12 H Instead of 4 H ML20055J2671990-07-25025 July 1990 Forwards Info Constituting Decommissioning Financial Assurance Certification Rept,Per 10CFR50.33(k)(2) & 50.75(b) ML17305A9771990-07-25025 July 1990 Forwards Status of Corrective Actions to Min Multiple Control Element Assembly Drop Events at Plant.Insp of Insulation Coils & Replacement of Defective Coils for Units 1 & 2 Completed ML20055J1711990-07-25025 July 1990 Forwards Certification of Decommissioning Financial Assurances for Plant,Per 10CFR50.75(b) & 50.33(k)(2) ML20055J1031990-07-25025 July 1990 Forwards Certification of Decommissioning Financial Assurances ML17305A9411990-07-20020 July 1990 Forwards Response to NRC Bulletin 90-001, Loss of Fill Oil in Transmitters Mfg by Rosemount. ML17305A9431990-07-17017 July 1990 Forwards Rev 1 to Palo Verde Nuclear Generating Station Annual Radiological Environ Operating Rept for 1987. Rev Results from Internal Review Bu Nuclear Safety Group & Audit Performed by Radiation Protection Stds ML17305A9601990-07-13013 July 1990 Forwards Preliminary Response Re Justification for Continued Operation of Fire Protection Sys Equipment,Per Insp Repts 50-528/90-25,50-529/90-25 & 50-530/90-25 ML17305A9331990-07-12012 July 1990 Discusses Util Compliance w/fitness-for-duty Program Implementation.Lab Specialists,Inc Audited & Monitored W/ Satisfactory Results.Ltr of Agreement Has Been in Place Since 900202 ML17305A9391990-07-0909 July 1990 Forwards Endorsement 44 to Maelu Policy MF-116 & Endorsement 62 to Nelia Policy NF-266 ML17305A9341990-07-0909 July 1990 Submits Results of 900514-18 NUREG-1220 Audit,Per NRC 900608 Request,Per Insp of Plant.Remaining Licensed Operators Found to Be in Conformance W/Medical Exam Requirements of 10CFR50.55 ML17305A9151990-06-29029 June 1990 Forwards Emergency Lighting Failure Data Update,Per 900621 Request ML17305A9061990-06-26026 June 1990 Suppls 891114 Response to Violations Noted in Insp Rept 50-528/89-16.Application for Amend to License NPF-41 Will Be Submitted in Oct 1990 to Permit Lower Flow Rate for RCS & Shutdown Cooling Sys ML17305A9111990-06-25025 June 1990 Responds to Generic Ltr 90-04, Status of Implementation of Generic Safety Issues. ML17305A9081990-06-25025 June 1990 Forwards Schedule Reiterating Util Plans for Implementation of USIs A-9 & A-44 & Provides Current Forecast Refuel Dates ML17305A9051990-06-25025 June 1990 Forwards Endorsement 45 to Maelu Policy MF-116 & Endorsement 63 to Nelia Policy NF-266 ML17305A9121990-06-24024 June 1990 Forwards Discharge Test Voltage Curve,Per 900623 Request for Completion of Emergency Lighting Exide Power Supply Prior to Entry Into Mode 2 ML17305A9171990-06-24024 June 1990 Confirms Compliance W/Agreed Upon Course of Action for Restart of Facility as Outlined in 891224 Ltr & Completion of Items Contained in Restart List Provided as Attachment to 900111 Ltr ML17305A8961990-06-20020 June 1990 Responds to NRC 900521 Ltr Re Violations Noted in Insp Repts 50-528/90-12,50-529/90-12 & 50-530/90-12.Corrective Action: Wiring in PPS Cabinets & Cabinet Drawers Reworked in Accordance W/Approved Work Authorization Documents IR 05000528/19900021990-06-19019 June 1990 Describes Current Status & Provides Description of Actions Taken to Ensure Continued High Reliability of Emergency Lighting Sys,Per Insp Repts 50-528/90-02,50-529/90-02 & 50-530/90-02.Emergency Lights Mfg by Emergi-Lite ML17305A9041990-06-19019 June 1990 Describes Current Status & Provides Description of Actions Taken to Ensure Continued High Reliability of Emergency Lighting Sys,Per Insp Repts 50-528/90-02,50-529/90-02 & 50-530/90-02.Emergency Lights Mfg by Emergi-Lite ML17305A8891990-06-15015 June 1990 Informs NRC That post-restart Items Due Prior to Scheduled Restart Have Been Completed on Schedule W/Listed Exceptions ML17305A8871990-06-14014 June 1990 Advises That Fuel Pool Cooling & Cleanup Procedures Being Restructured,Per Response to Violations in Insp Repts 50-528/89-36 & 50-530/89-36 ML17305A8731990-06-0808 June 1990 Responds to Bulletin 88-005 Re Product Forms Other than Fittings & Flanges for Plant.Significant Number of Lugs Delivered to Plant.Util Should Be Notified,If NRC Previous Review of Records Has Identified Other Product Forms ML17305A9421990-06-0101 June 1990 Forwards Pinnacle West Response to State of Az Corp Commission Complaint Filed W/Us Securities & Exchange Commission on 900521,to Revoke Exemption from Public Utils Holding Co Act ML17305A8661990-05-31031 May 1990 Forwards Projected 1990 Cash Flow Statements ML17305A8391990-05-31031 May 1990 Forwards 1990 Reactor Containment Bldg Integrated Leak Rate Test,Final Rept. ML17305A8571990-05-31031 May 1990 Forwards Amended Pages of Feb,Mar & Apr 1990 Monthly Operating Repts for Palo Verde Nuclear Generating Station Unit 2 ML17305A8201990-05-23023 May 1990 Provides Status of Improvements to Eliminate Possibility of Multiple Control Element Assembly Drop Events.Licensee Developed Mod to Ground Fault Detection Sys to Assure Continuous Monitoring & Annunciation of Any Future Faults ML20043B6421990-05-19019 May 1990 Forwards Amend 26 to Security Plan.Amend Withheld (Ref 10CFR2.790(d) & 10CFR73.21) ML17305A7841990-05-15015 May 1990 Forwards Special Rept 2-SR-90-002 Re Steam Generator Tube Plugging Due to Inservice Insp Activities.Twenty Tubes Plugged in Steam Generator 1 & ninety-one Tubes Plugged in Steam Generator 2 ML17305A8721990-05-14014 May 1990 Forwards Arizona Corp Commission Complaint Filed W/Us Securities & Exchange Commission Seeking Revocation or Mod of Exemption of Pinnacle West Capital Corp.Complaint Wholly W/O Merit ML17305A7621990-05-11011 May 1990 Responds to NRC 900413 Ltr Re Violations Noted in Insp Repts 50-528/90-03,50-529/90-03 & 50-530/90-03.Corrective Actions: Night Order Written for Guidance on Use of Instrumentation W/Maint Tag Present ML17305A7921990-05-0808 May 1990 Forwards Public Version of Rev 2 to EPIP-14, Dose Assessment. W/900523 Release Memo ML20043A0511990-05-0303 May 1990 Forwards Public Version of Revised Epips,Including Procedure Change Notice 11 to Rev 12 to EPIP-04 & Procedure Change Notice 1 to Rev 6 to EPIP-15 ML17305A7421990-05-0303 May 1990 Responds to 900330 Enforcement Conference Re Violations Noted in Insp Repts 50-528/90-04,50-529/90-13 & 50-530/90-13.Corrective Action:Special Locking Mechanisms Installed on Currently Posted Radiation Area Doors & Gates ML17305A8861990-04-30030 April 1990 Forwards EPIP Update,Including Rev 7 to EPIP 02,Rev 12 to EPIP 03 & Rev 9 to EPIP 20.W/o Encl ML17305A7381990-04-30030 April 1990 Forwards Annual Environ Operating Rept for 1989 & Annual Rept for Salt Deposition Monitoring Program 1989. ML17305A7131990-04-20020 April 1990 Responds to NRC 900321 Ltr Re Violations Noted in Insp Rept 50-530/90-08.Corrective Action:Plant Guideline Providing Addl Guidance Re Prioritization of Work Promulgated ML17305A6891990-04-16016 April 1990 Forwards Rev to Cycle 3 Reload Analysis Rept,Submitted 891024.Rev Reflects Early end-of-cycle Unit Shutdown & Replacement of Eight New Fuel Assemblies ML17305A7011990-04-12012 April 1990 Forwards Rev 3 to Palo Verde Nuclear Generating Station Post-Restart Actions, Per JB Martin 891224 Ltr ML17305A7081990-04-0909 April 1990 Forwards post-exam Security Agreements for Dk Hendrick, D Ensign,M Alavi & Author.Agreement Certifies That Signatories Will Not Divulge Info Re 900320 Exams 1990-09-17
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REGULA Y INFORMATION DISTRIBUTIQ YSTEM (RIDS)ACCESSlQN NBR: 8707010411 DOC.DATE: 87/06/22 NOTARIZED:
NO DOCKET N FACIL: STN-50-528 Palo Verde Nuclear Stationi Unit iI Arizona Pub li 05000528 STN-50-52'7 Palo Verde Nuclear Stationi Unit 2I Arizona Pub li 0500052'P STN-50-530 Palo Verde Nuclear Stationi Unit 3I Arizona Publi 05000530 AUTH.NAME AUTHOR AFFILIATION HAYNESI J.G.Arizona Nuclear Pomer Prospect (formerly Arizona Public Serv REC IP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Formards summary of evaluations/analyses re core protection calculator Zc core operating limit supervisory sos floUJ coastdoen penaltiesI per EA Licitra 870407 Yequest for addi inf o.DISTRIBUTIDN CODE: AQQID COPIES RECEIVED: LTR l ENCL i SIZE: TITLE: OR Submittal:
General Distribution NOTES: Standardized plant.M.Davisi NRR: 1Cg.Standardized plant.M.Davisi NRR: 1Cg.Standardized plant.M.Davisi NRR: 1Cg.05000528 05000529 05000530 REC IP IENT ID CODE/NAME PD5 LA LI C I TRAI E COPIES RECIPIENT LTTR ENCL ID CODE/NAME 1 0 PD5 PD 1 1 D*VISI M COPIES LTTR ENCL 5 5 INTERNAL: ACRS NRR/DEST/ADE NRR/DQEA/TSB OGC/HDS1 RES/DE/EIB EXTERNAL: EGSG BRUSKEz S NRC PDR NOTES: 6 1 1 6 ARM/DAF/LFMB 1 NRR/DEBT/ADS 1 NRR/PMAS/ILRB 0 REG=F'~~01 1 LPDR NSIC 0 1 1 1 1 1}1 1 TOTAL NUMBER OF COPIES REQUIRED: LTTR 27 ENCL 24 r
Arizona Nuclear Power Project P.O.SOX 52034 4 PHOENIX, ARIZONA 85072-2034 U.S.Nuclear Regulatory Commission Attention:
Document Control Desk Washington, D.C.20555 June 22, 1987 161-00293-JGH/BJA
Subject:
Palo Verde Nuclear Generating Station (PVNGS)Units 1, 2 and 3 Docket Nos.STN 50-528 (License No.NPF-41)STN 50-529 (License No.NPF-51)STN 50-530 (License No.NPF-65)RCP Coastdown Safety Analysis File: 87-A-056-026
.
References:
(1)Letter from J.G.Haynes, ANPP, to USNRC Document Control Desk dated April 30, 1987 (161-00180-JGH/BJA).
Subject:
RCP Coastdown Safety Analysis.(2)Letter from E.A.Licitra, NRC, to E.E.Van Brunt, Jr., ANPP, dated April 7, 1987.
Subject:
RCP Coastdown Safety Analysis.
Dear Sirs:
In response to the NRC Staff request for additional information on the RCP coastdown safety analysis, ANPP committed to provide a summary of this analysis for NRC Staff review.This summary of the analysis that was conducted by the NSSS vendor is presented in the attachment to this letter.If you have any additional questions on this matter, please contact Mr.W.F.Quinn of my staff.Very truly yours,'.G.Hay es Vice President Nuclear Production JGH/BJA/dim Attachment cc: 0.M.De Michele (all w/a)E.E.Van Brunt, Jr.G.W.Knighton E.A.Licitra R.P.Zimmerman J.B.Martin A.C.Gehr I" 8 O~o>o411 87ahpg PDR ADOCK 05000528~P PDR Pydl Ift
PALO VERDE UNITS 1 AND 2
SUMMARY
OF EVALUATIONS ANALYSES PERTAINING TO CPC COLSS FLOW COASTDOWN PENALTIES The evaluations and analyses in response to faster Reactor Coolant Pump (RCP)coastdowns observed at Palo Verde Units 1 and 2 can be grouped under the following categories to summarize the.-procedure employed in, first installing the COLSS/CPC penalties and, then removing the penalties.
1.COMPARISON OF PCHF RCP COASTDOWN TEST DATA w o Electrical Breakin The post core hot functional (PCHF)RCP coastdown test data is not impacted by the electrical braking effect since the RCPs are isolated from the e3.e'ctrical bus that powers them at the initiation of the event.This data was compared against the CESSAR RCP flow coastdown prediction (CESSAR Figure 15.3.1-7)for both Units 1 and 2 to determine the conservatism in the CESSAR prediction.
The comparison for Unit 1 suggested that the test data is conservatively predicted by the CESSAR curve.Three sets of PCHF test data (test dates: 04/02/86, 07/31/86 and 09/11/86)were.collected on Unit 2 RCP coastdown.
The first set of data, when compared to CESSAR, was determined to represent a 2R faster RCP coastdown during the time frame of interest for the DNBR calculation (0.0-3.0 sec.).In order to accommodate the 2R faster Unit 2 RCP coastdown a penalty factor of 2R was installed in both the Core Protection Calculator (CPC)and the Core Operating Limit Supervisory System, (COLSS).The second and third sets of Unit 2 PCHF RCP coastdown test data were compared against the Unit 1 PCHF RCP coastdown data.This comparison indicated that there was no significant difference between Unit 1 and Unit 2 PCHF test data.Further, it was verified that the CESSAR prediction was conservative with respect to'he test data, This later information on the Unit 2 RCP coastdown was employed to remove the 296 flow coastdown penalties installed in the CPC/COLSS.
2.EVALUATION OF ELECTRICAL BRAKING EFFECT An electrical braking effect of the RCPs was experienced in both Unit 1 and Unit 2.This effect was discovered in Unit 1 during the turbine trip test (with a failure to fast transfer)and in Unit 2 during the loss of offsite power test.These events cause a simultaneous loss of power to all four RCPs, resulting in a four pump flow coastdown.
The evaluation of the Unit 1 coastdown data (with electrical braking)indicated that the flow coastdown was approximately 1.5@
I faster than that predicted in the CESSAR.The evaluation of Unit 2 data indicated that the Unit 2 RCPs coasted down slightly faster than the Unit 1 RCPs under the influence of the electrical braking effect.The Unit 2 RCPs were determined to coastdown 2.88 faster than the CESSAR prediction.
The reason for this faster coastdown was due to the sharing of the same electrical bus with the RCPs and various house loads.Since the maximum possible house load was not employed in the test, a calculation was performed to determine the worst case RCP coastdown with the RCP bus fully loaded.This was achieved by;(1)using the torque balance equation for the RCPs as ZT=-I(dw/dt), where ET=friction and windage torque+hydraulic torque+torque due to electrical braking and, (2)estimating the magnitude of the"worst case" electrical braking.torque and its variation with time using the turbine trip test data.C.i A comparison of.the calculated worst case RCP flow coastdown curve with the CESSAR flow coastdown curve indicated that the maximum flow deficit is about 2R during the first second of the coastdown.
At later times the flow deficits were lower.Any COGSS~CPC penalties to be installed would be conservatively based on this maximum flow'eficit.
An evaluation of the FSAR Chapters 6 and 15 safety analyses was undertaken to quantify the impact of a.296 faster RCP coastdown.
This evaluation identified that the Excess Goad transient and the Loss of Flow event needed to be evaluated for the impact of a faster than anticipated coastdown.
Note: All events in combination with.a loss of offsite power would be impacted by the faster coastdown.
However, if acceptable consequences can be demonstrated for the loss of flow event, then those events in combination with a loss of offsite power would also show acceptable consequences.
Additionally,.the Doss of Flow event is the only PVNGS accident analysis that uses the best estimate flow coastdown curve.For any of the other PVNGS accident analyses, the assumed coastdown is conservatively fast since only 90@of the RCP rotational inertia is assumed.Evaluations of the Excess Load and the Loss of Flow event determined that a penalty of 1.8R (in CPC/CODSS) was necessary to ensure acceptable consequences under the condition of a faster coastdown, due to electrical braking.This penalty was conservatively rounded to 2.0R.Based on the faster RCP coastdown observed for Unit 1 due to electrical braking effect and the faster RCP coastdown observed from the first set of Unit 2 PCHF data, a larger.penalty was installed in Unit 2 CPC/COLSS.
This amounted to a 4R penalty (2R for PCHF penalty and 2R for electrical braking effect).The 4
'1 actual flow deficit (2.8K)for Unit 2 represents the cumulative impact on the RCPs due to all effects, including the electrical braking effect.Therfore, the 496 penalty installed in Unit 2 CPC/COLSS is considered to be a conservative upper bound.These initial evaluations of the effect of the more rapid coastdown only consider the negative effect of the lower flow.No attempt was made to credit the fact that a faster coastdown would result in a faster trip.3.EVALUATIONS TO REMOVE COLSS CPC PENALTIES The COLSS/CPC penalties installed on both units were eliminated by careful consideration of the following factors related to a reduction in the time it takes for the CPC to generate a trip on flow projected low DNBR.These considerations were necessary to ensure acceptable consequences for the Loss of Flow event and the Excess Load transient with a loss of offsite power.(a)The reduction in measured flow compared to predicted flow.(b)The derivatives of flow with respect to time.To facilitate the removal of the penalties (after consideration of both events and the penalities used in both plants)it was determined that a reduction in the time to trip from 0.6 seconds (CESSAR value).to 0.3 seconds would be required.Consistent with this requirement, an evaluation of the CPC hardware/software capability was undertaken to determine whether a CPC flow projected low DNBR trip signal can be generated within this time (i.e.0.0-0.3 seconds).The CPC Simulation computer code was xun with the electrical braking effect data to prove that the time to trip response meets the-requirements for the affected events.Pump speed data (conservatively modified)was used as inputs to the CPC Simulation code to predict a maximum time to trip for the affected events.To this calculated time to trip all possible delays were added.These delays include the CPC timing cycles,.CPC application program execution times and the safety system hardware response times as recorded by ANPP in their Safety System Response Time Test.The results of the analysis showed that the CPC would meet the required time to trip of less than or equal to 0.3 seconds for the affected events.The following sample of actual plant data is provided as additional verification that the Palo Verde Units will generate a trip signal before 0.3 seconds.Unit 1: January 9, 1986, Turbine Trip Test (73PA-1MT02)
Trip Signal Generated at 0.287 seconds
Reference:
PTRR 1-86-001, dated 01-..09-86 Unit 2: Sept.11, 1986, Unit Load Rejection Test (73PA-2MA01)
Trip signal generated at 0,259 seconds
Reference:
PTRR 2-86-009, dated 09-11-86 1 I r 1 PALO VERDE UNITS 1 6 2 CHRONOLOGY OF EVENTS PERTAINING TO CPC COLSS FLOW COASTDOWN PENALTIES 05/21/85, V-CE-32408, Post Core Reactor Coolant System Flow Measurements 2.3.Document shows comparison of the predicted coastdown against Unit 1 post core hot functional RCP coastdown test data.01/17/86, FAR 814273-1612, 100$'6 Turbine Trip RCP Coastdown Electrical Braking effect on Unit 1 RCP coastdown was observed.Evaluated impact of the faster coastdown on FSAR safety analyses.Identified Loss of Flow and Excess Load transients as being impacted.Proposed CPC/COLSS penalties of 1.88 to compensate for a 29'aster coastdown.
02/18/86, V-CE-33438, Removal of Flow Coastdown Penalties for Unit 1 Evaluated capability of CPC to provide a faster trip signal than that assumed in FSAR (0.6 sec.).Evaluation determined that within.0.3 seconds a CPC trip on flow projected low DNBR can be obtained.4.04/10/86, V-CE-33638, Evaluation of Unit 2 RCP Coastdown Data Unit 2 post core hot functional (PCHF)RCP coastdown test data (no electrical braking effect)was evaluated.
Data showed 2R faster coastdown in comparison to Unit..1 PCHF data and CESSAR prediction.
Assuming the electrical braking effect to be similar to that for Unit 1 RCPs, it was recommended that a 4R CPC/COLSS penalty be installed.
5.09/12/86, V-CE-34093, Partial Removal of RCP Coastdown Penalty'or Unit 2 More Unit 2 PCHF RCP coastdown test data became available.
Comparison of the data from these tests against Unit 1 data showed that the Unit 2 data is very similar to Unit 1.Thus, 2R of the 4R penalty imposed on Unit 2 was recommended to be removed.r 10/09/86, V-CE-34167, Removal'f Entire Flow Coastdown penalty Unit 2 Data from the 508 power loss of offsite power test was obtained.RCP coastdown was faster (2.8X)than that predicted by CESSAR.A further evaluation of the CPC was made to determine whether the 2.8R faster RCP coastdown can be accommodated by the CPCs capability to generate a faster trip signal.This was confirmed and it was recommended that the entire 4R penalty be removed.
a'