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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20217P2061999-10-26026 October 1999 Forwards for First Energy Nuclear Operating Co Insp Rept 50-346/99-17 on 990928-1001.Insp Was Exam of Activities Conducted Under License Re Implementation of Physical Security Program.No Violations Identified ML20217N3851999-10-20020 October 1999 Forwards RAI Re Licensee 990521 Request for License Amend to Allow Irradiated Fuel to Be Stored in Cask Pit at Davis-Besse,Unit 1.Response Requested within 60 Days from Receipt of Ltr ML20217N2321999-10-15015 October 1999 Requests NRC Approval to Use Alternative to Requirements of 10CFR50.55a(f)(4)(ii).Licensee Requests Extension to Specified Schedule for Implementing Updates to IST Program ML20217G9201999-10-14014 October 1999 Discusses Utils Request for Approval of Quality Assurance Program Changes PY-CEI-NRR-2438, Informs That DBNPS & Pnpp Staffs Have Modified or Withdrawn Several of Positions Proposed within Re Request for Approval of Qap.Revised Positions Encl1999-10-14014 October 1999 Informs That DBNPS & Pnpp Staffs Have Modified or Withdrawn Several of Positions Proposed within Re Request for Approval of Qap.Revised Positions Encl ML20217F8371999-10-0808 October 1999 Forwards Insp Rept 50-346/99-10 on 990802-0913.One Violation Occurred Being Treated as NCV ML20217A5641999-09-30030 September 1999 Informs of Completion of mid-cycle PPR of Davis-Besse on 990901.Informs That NRC Plans to Conduct Addl Insps to Address Questions Raised by Issues Re Operator Errors & Failure to Commit to JOG Topical Rept on MOV Verification ML20212L0691999-09-30030 September 1999 Forwards,For Review & Comment,Copy of Preliminary ASP Analysis of Operational Condition Discovered at Unit 1 on 981014,as Reported in LER 346/98-011 ML20216J6701999-09-24024 September 1999 Forwards Post Examination Documentation for Written Operator Initial License Examination Administered at Davis-Besse Nuclear Power Station on 990920.Without Encls ML20212D3501999-09-21021 September 1999 Forward Copy of Final Accident Sequence Precursor Analysis of Operational Event at Plant,Unit 1 on 980624,reported in LER 346/98-006 05000346/LER-1998-001, Forwards Rev 1 for LER 1998-001,which Updates Corrective Actions & Revises Completion Date Re Implementation of Changes to Plant Emergency Operating Procedure.List of Commitments Attached1999-09-0909 September 1999 Forwards Rev 1 for LER 1998-001,which Updates Corrective Actions & Revises Completion Date Re Implementation of Changes to Plant Emergency Operating Procedure.List of Commitments Attached ML20216E5961999-09-0707 September 1999 Forwards Application for Amend to License NPF-3,revising Tech Specs 3/4.3.2.1,safety Features Actuation Sys Instrumentation & Associated Bases 3/4.3.1 & 3/4.3.2,reactor Protection Sys & Safety Sys Instrumentation ML20211P3001999-09-0707 September 1999 Forwards FEMA Transmitting FEMA Evaluation Rept for 990504 Emergency Preparedness Exercise at Davis-Besse Nuclear Power Plant.No Deficiencies Identified.One Area Requiring C/A & Two Planning Issues Identified ML20211K6681999-08-30030 August 1999 Forwards Copies of Certified Personal Qualification Statement - Licensee (NRC Form 398) for Operator Candidates Listed Below.Without Encls ML20211K6611999-08-30030 August 1999 Forwards Copies of Operator License Renewal Applications for Individuals Listed.Operators Have Successfully Completed Appropriate Operator Requalification Training Program at Dbnps.Without Encls ML20211K0951999-08-30030 August 1999 Forwards Request for Addl Info Re Fire & Seismic Analyses of IPEEE for Davis-Besse Nuclear Power Station,Unit 1. Response Requested within 60 Days ML20211H0201999-08-25025 August 1999 Forwards semi-annual FFD Rept for 990101-0630 for DBNPS, Unit 1,IAW 10CFR26.71(d) ML20211D1171999-08-20020 August 1999 Forwards Insp Rept 50-346/99-09 on 990623-0802.Violations Identified & Being Treated as Noncited Violations ML20211G3911999-08-20020 August 1999 Forwards Update to Estimated Info for Licensing Action Requests Through 010930,re Administrative Ltr 99-02, Operating Reactor Licensing Action Estimates PY-CEI-NRR-2411, Informs That Firstenergy Nuclear Operating Co Has Developed Corporate QA Program Manual for Davis-Besse Nuclear Power Station & Perry Nuclear Power Plant,As Discussed on 990318 Between Util & Nrc.Revised USAR Pages,Encl1999-08-19019 August 1999 Informs That Firstenergy Nuclear Operating Co Has Developed Corporate QA Program Manual for Davis-Besse Nuclear Power Station & Perry Nuclear Power Plant,As Discussed on 990318 Between Util & Nrc.Revised USAR Pages,Encl ML20211J9201999-08-13013 August 1999 Urges NRC to Find Funds for Stockpiling Radiation Pills for Residents Living Near Plant ML20211B0161999-08-13013 August 1999 Forwards SE Accepting Evaluation of Second 10-year Interval Inservice Insp Program Request for Relief Numbers RR-A16, RR-A17 & RR-B9 for Plant,Unit 1 ML20210T1061999-08-12012 August 1999 Forwards Preliminary NRC Forms 398 & 396 for Listed Candidates,Per Operator License Exam Scheduled for Week of 990913.Encl Withheld ML20210S6071999-08-11011 August 1999 Provides Final Response to NRC RAI Re GL 98-01, Y2K Readiness of Computer Systems at Npps ML20210P8051999-08-0909 August 1999 Forwards Insp Rept 50-346/99-15 on 990712-16.No Violations Noted.However,Several Deficiencies Were Identified with Implementation of Remp,Which Collectively Indicated Need for Improved Oversight of Program IR 05000346/19980211999-08-0606 August 1999 Refers to NRC Insp Rept 50-346/98-21 Conducted on 980901- 990513 & Forwards Nov.Two Violations Identified Involving Failure to Maintain Design of Valve & Inadequate C/A for Degraded Condition Cited in Encl NOV 05000346/LER-1998-009, Forwards LER 98-009-01,IAW 10CFR50.73(a)(2)(ii)(B). Commitments Made by Util Are Encl1999-08-0606 August 1999 Forwards LER 98-009-01,IAW 10CFR50.73(a)(2)(ii)(B). Commitments Made by Util Are Encl ML20210H6101999-07-30030 July 1999 Informs That Region III Received Rev 21 to Various Portions of Davis-Besse Nuclear Power Station Emergency Plan.Revision Was Submitted Under Provisions of 10CFR50.54(q) in Apr 1999 ML20210H0491999-07-28028 July 1999 Forwards Application for Amend to License NPF-3,revising TS 3/4.7.5.1, Ultimate Heat Sink, to Allow Plant Operation in Modes 1-4 with Water Temp Less than or Equal to 90 F ML20210G5521999-07-28028 July 1999 Provides Addl Response to 980923 OL Licensing Exam Rept 50-346/98-301 Re OL Exam Administered in Aug 1998.Results of Root Cause Investigation & Corrective Actions,Discussed ML20210G3831999-07-27027 July 1999 Forwards Application for Amend to NPF-3,changing TSs 6.4, Training, 6.5.2.8, Audits, 6.10, Record Retention, 6.14, Process Control Program & 6.15, Odcm ML20211P3071999-07-26026 July 1999 Forwards Final Rept for 990504 Biennial Radiological Emergency Preparedness Exercise for David-Besse Power Station.No Deficiencies Identified for Any Jurisdiction During Exercise ML20210G4391999-07-26026 July 1999 Forwards Application for Amend to License NPF-3,revising Tech Specs 3/4.3.2.1, Safety Features Actuation Sys Instrumentation, & Associated Bases 3/4.3.1 & 3/4.3.2, Reactor Protection Sys & Safety Sys Instrumentation ML20210G7151999-07-26026 July 1999 Forwards Application for Amend to License NPF-3,revising TSs 3/4.3.3.1, Radiation Monitoring Instrumentation, 3/4.3.3.2, Instrument - Incore Detectors & 3/4.3.3.9, Instrumentation - Waste Gas Sys Oxygen Monitor ML20210G5151999-07-26026 July 1999 Forwards Application for Amend to License NPF-3,revising Tech Specs for Implementation of 10CFR50,App J,Option B for Type B & C Containment Leakage Rate Testing ML20210G3211999-07-26026 July 1999 Forwards Written OL Exam & Supporting Matl for Exam to Be Administered at DBNPS During Week of 990913.Listed Encls Withheld from Public Disclosure Until After Exam Complete ML20210C4381999-07-20020 July 1999 Forwards Insp Rept 50-346/99-08 on 990513-0622.Unidentified RCS Leak Approached TS Limit of 1 Gallon Per Minute Prior to Recently Completed Maint Outage.Three Violations of NRC Requirements Identified & Being Treated as NCVs ML20209G3681999-07-15015 July 1999 Advises That Info Submitted in & 990519 Affidavit Re Design & Licensing Rept,Davis-Besse,Unit 1 Cask Pit Rack Installation Project,Holtec Intl, HI-981933,marked Proprietary,Will Be Withheld from Public Disclosure ML20207H6401999-07-0909 July 1999 Discusses Closure of TAC MA0540 Re Util Responses to RAI on GL 92-01,rev 1,suppl 1, Rv Structural Integrity. Staff Has Revised Info in Rvid & Releasing It as Rvid Version 2 ML20209D1341999-07-0808 July 1999 Forwards Notice of Withdrawal of Application for Amend to Operating License.Proposed Change Would Have Modified Facility TSs Pertaining to Allowable as-found Pressure Lift Setting Tolerance of Two Pressurizer Code Safety Valves 05000346/LER-1998-012, Forwards LER 98-012-01,which Is Being Submitted to Provide Addl Info Re 981018 Occurrence.Commitment List Attached1999-07-0707 July 1999 Forwards LER 98-012-01,which Is Being Submitted to Provide Addl Info Re 981018 Occurrence.Commitment List Attached ML20209C3981999-07-0101 July 1999 Responds to NRC Re Violations Noted in Insp Rept 50-346/98-21.Corrective Actions:Developed Rev to Boric Acid Control Program & Work Process Guideline on Plant Leakage ML20209B5821999-06-24024 June 1999 Provides Justification for Rev to Completion Date for One of Insp follow-up Items Cited in Insp Rept 50-346/98-03, Designated as Inspector follow-up Item 50-346/97-201-10 ML20196G1251999-06-23023 June 1999 Responds to NRC RAI Re GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants ML20196E5321999-06-17017 June 1999 Forwards Addl Info Re Relief Request RR-A16 to Support NRC Approval of Relief Request ML20195K2751999-06-16016 June 1999 Forwards Safety Evaluation Re GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves ML20196A6601999-06-16016 June 1999 Forwards Master Decommissioning Trust Agreements Revised After 1990 for Ohio Edison Co,Cleveland Electric Illuminating Co,Toledo Edison Co & Pennsylvania Power Co Re Bvnps,Units 1 & 2,DBNPS,Unit 1 & Perry Unit 1 ML20195F9071999-06-10010 June 1999 Forwards Application for Amend to NPF-3,changing Tech Specs 3/4.6.4.4, Hydrogen Purge Sys, TS 3/4.6.5.1, Shield Bldg Emergency Ventilation Sys & TS 3/4.7.6.1, Crevs ML20195F8851999-06-0707 June 1999 Withdraws 950929 License Amend Application,Proposing Mod to Allowable as-found Pressure Lift Setting Tolerance of Two Pressurizer Code Safety Valves ML20207G0751999-06-0707 June 1999 Forwards Insp Rept 50-346/99-04 on 990323-0513.Violations Occurred & Being Treated as non-cited Violations,Consistent with App C of Enforcement Policy 1999-09-09
[Table view] Category:INCOMING CORRESPONDENCE
MONTHYEARML20217N2321999-10-15015 October 1999 Requests NRC Approval to Use Alternative to Requirements of 10CFR50.55a(f)(4)(ii).Licensee Requests Extension to Specified Schedule for Implementing Updates to IST Program PY-CEI-NRR-2438, Informs That DBNPS & Pnpp Staffs Have Modified or Withdrawn Several of Positions Proposed within Re Request for Approval of Qap.Revised Positions Encl1999-10-14014 October 1999 Informs That DBNPS & Pnpp Staffs Have Modified or Withdrawn Several of Positions Proposed within Re Request for Approval of Qap.Revised Positions Encl ML20216J6701999-09-24024 September 1999 Forwards Post Examination Documentation for Written Operator Initial License Examination Administered at Davis-Besse Nuclear Power Station on 990920.Without Encls 05000346/LER-1998-001, Forwards Rev 1 for LER 1998-001,which Updates Corrective Actions & Revises Completion Date Re Implementation of Changes to Plant Emergency Operating Procedure.List of Commitments Attached1999-09-0909 September 1999 Forwards Rev 1 for LER 1998-001,which Updates Corrective Actions & Revises Completion Date Re Implementation of Changes to Plant Emergency Operating Procedure.List of Commitments Attached ML20216E5961999-09-0707 September 1999 Forwards Application for Amend to License NPF-3,revising Tech Specs 3/4.3.2.1,safety Features Actuation Sys Instrumentation & Associated Bases 3/4.3.1 & 3/4.3.2,reactor Protection Sys & Safety Sys Instrumentation ML20211K6611999-08-30030 August 1999 Forwards Copies of Operator License Renewal Applications for Individuals Listed.Operators Have Successfully Completed Appropriate Operator Requalification Training Program at Dbnps.Without Encls ML20211K6681999-08-30030 August 1999 Forwards Copies of Certified Personal Qualification Statement - Licensee (NRC Form 398) for Operator Candidates Listed Below.Without Encls ML20211H0201999-08-25025 August 1999 Forwards semi-annual FFD Rept for 990101-0630 for DBNPS, Unit 1,IAW 10CFR26.71(d) ML20211G3911999-08-20020 August 1999 Forwards Update to Estimated Info for Licensing Action Requests Through 010930,re Administrative Ltr 99-02, Operating Reactor Licensing Action Estimates PY-CEI-NRR-2411, Informs That Firstenergy Nuclear Operating Co Has Developed Corporate QA Program Manual for Davis-Besse Nuclear Power Station & Perry Nuclear Power Plant,As Discussed on 990318 Between Util & Nrc.Revised USAR Pages,Encl1999-08-19019 August 1999 Informs That Firstenergy Nuclear Operating Co Has Developed Corporate QA Program Manual for Davis-Besse Nuclear Power Station & Perry Nuclear Power Plant,As Discussed on 990318 Between Util & Nrc.Revised USAR Pages,Encl ML20211J9201999-08-13013 August 1999 Urges NRC to Find Funds for Stockpiling Radiation Pills for Residents Living Near Plant ML20210T1061999-08-12012 August 1999 Forwards Preliminary NRC Forms 398 & 396 for Listed Candidates,Per Operator License Exam Scheduled for Week of 990913.Encl Withheld ML20210S6071999-08-11011 August 1999 Provides Final Response to NRC RAI Re GL 98-01, Y2K Readiness of Computer Systems at Npps 05000346/LER-1998-009, Forwards LER 98-009-01,IAW 10CFR50.73(a)(2)(ii)(B). Commitments Made by Util Are Encl1999-08-0606 August 1999 Forwards LER 98-009-01,IAW 10CFR50.73(a)(2)(ii)(B). Commitments Made by Util Are Encl ML20210G5521999-07-28028 July 1999 Provides Addl Response to 980923 OL Licensing Exam Rept 50-346/98-301 Re OL Exam Administered in Aug 1998.Results of Root Cause Investigation & Corrective Actions,Discussed ML20210H0491999-07-28028 July 1999 Forwards Application for Amend to License NPF-3,revising TS 3/4.7.5.1, Ultimate Heat Sink, to Allow Plant Operation in Modes 1-4 with Water Temp Less than or Equal to 90 F ML20210G3831999-07-27027 July 1999 Forwards Application for Amend to NPF-3,changing TSs 6.4, Training, 6.5.2.8, Audits, 6.10, Record Retention, 6.14, Process Control Program & 6.15, Odcm ML20210G4391999-07-26026 July 1999 Forwards Application for Amend to License NPF-3,revising Tech Specs 3/4.3.2.1, Safety Features Actuation Sys Instrumentation, & Associated Bases 3/4.3.1 & 3/4.3.2, Reactor Protection Sys & Safety Sys Instrumentation ML20210G7151999-07-26026 July 1999 Forwards Application for Amend to License NPF-3,revising TSs 3/4.3.3.1, Radiation Monitoring Instrumentation, 3/4.3.3.2, Instrument - Incore Detectors & 3/4.3.3.9, Instrumentation - Waste Gas Sys Oxygen Monitor ML20210G5151999-07-26026 July 1999 Forwards Application for Amend to License NPF-3,revising Tech Specs for Implementation of 10CFR50,App J,Option B for Type B & C Containment Leakage Rate Testing ML20211P3071999-07-26026 July 1999 Forwards Final Rept for 990504 Biennial Radiological Emergency Preparedness Exercise for David-Besse Power Station.No Deficiencies Identified for Any Jurisdiction During Exercise ML20210G3211999-07-26026 July 1999 Forwards Written OL Exam & Supporting Matl for Exam to Be Administered at DBNPS During Week of 990913.Listed Encls Withheld from Public Disclosure Until After Exam Complete 05000346/LER-1998-012, Forwards LER 98-012-01,which Is Being Submitted to Provide Addl Info Re 981018 Occurrence.Commitment List Attached1999-07-0707 July 1999 Forwards LER 98-012-01,which Is Being Submitted to Provide Addl Info Re 981018 Occurrence.Commitment List Attached ML20209C3981999-07-0101 July 1999 Responds to NRC Re Violations Noted in Insp Rept 50-346/98-21.Corrective Actions:Developed Rev to Boric Acid Control Program & Work Process Guideline on Plant Leakage ML20209B5821999-06-24024 June 1999 Provides Justification for Rev to Completion Date for One of Insp follow-up Items Cited in Insp Rept 50-346/98-03, Designated as Inspector follow-up Item 50-346/97-201-10 ML20196G1251999-06-23023 June 1999 Responds to NRC RAI Re GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants ML20196E5321999-06-17017 June 1999 Forwards Addl Info Re Relief Request RR-A16 to Support NRC Approval of Relief Request ML20196A6601999-06-16016 June 1999 Forwards Master Decommissioning Trust Agreements Revised After 1990 for Ohio Edison Co,Cleveland Electric Illuminating Co,Toledo Edison Co & Pennsylvania Power Co Re Bvnps,Units 1 & 2,DBNPS,Unit 1 & Perry Unit 1 ML20195F9071999-06-10010 June 1999 Forwards Application for Amend to NPF-3,changing Tech Specs 3/4.6.4.4, Hydrogen Purge Sys, TS 3/4.6.5.1, Shield Bldg Emergency Ventilation Sys & TS 3/4.7.6.1, Crevs ML20195F8851999-06-0707 June 1999 Withdraws 950929 License Amend Application,Proposing Mod to Allowable as-found Pressure Lift Setting Tolerance of Two Pressurizer Code Safety Valves ML20207F4231999-06-0202 June 1999 Forwards Rev 1 to DBNPS Emergency Preparedness Evaluated Exercise Manual 990504, IAW 10CFR50.4.NRC Evaluated Exercise Has Been Rescheduled for 991208,since NRC Did Not Evaluate 990504 Exercise ML20207E9561999-05-28028 May 1999 Forwards Update to NRC AL 98-03,re Estimated Info for Licensing Activities Through Sept 30,2000 ML20207E2521999-05-28028 May 1999 Forwards Rev 18,App A,Change 1 to Davis-Besse Nuclear Power Station,Unit 1,industrial Security Plan IAW Provisions of 10CFR50.54(p).Encl Withheld,Per 10CFR73.21 ML20207E7801999-05-21021 May 1999 Forwards Application for Amend to License NPF-3,allowing Use of Expanded Spent Fuel Storage Capacity.Proprietary & non- Proprietary Version of Rev 2 to HI-981933 Re Cask Pit Rack Installation Project,Encl.Proprietary Info Withheld ML20206N0231999-05-0606 May 1999 Forwards License Renewal Applications for Davis-Besse Nuclear Power Station,Unit 1 for ML Klein,Cn Steenbergen & CS Strumsky.Without Encls ML20206D2421999-04-28028 April 1999 Forwards Combined Annual Radiological Environ Operating Rept & Radiological Effluent Release Rept for 1998. Rev 11, Change 1 to ODCM & 1998 Radiological Environ Monitoring Program Sample Analysis Results Also Encl PY-CEI-NRR-2382, Forwards 1998 Annual Rept for Firstenergy Corp, for Perry Nuclear Power Plant & Davis-Besse Nuclear Power Station.Form 10-K Annual Rept to Us Securities & Exchange Commission for FY98 Also Encl1999-04-21021 April 1999 Forwards 1998 Annual Rept for Firstenergy Corp, for Perry Nuclear Power Plant & Davis-Besse Nuclear Power Station.Form 10-K Annual Rept to Us Securities & Exchange Commission for FY98 Also Encl ML20206B8831999-04-17017 April 1999 Forwards 1634 Repts Re Results of Monitoring Provided to Individuals at Davis-Besse Nuclear Power Station During 1998,per 10CFR20.2206.Without Repts ML20205K5641999-04-0707 April 1999 Forwards Response to NRC 980415 RAI Re GL 96-06, Assurance of Equipment Operability & Ci During Design-Basis Accident Conditions. Rept FAI/98-126, Waterhammer Phenomena in Containment Air Cooler Swss, Encl ML20205K3871999-04-0707 April 1999 Forwards Copy of Application of Ceic,Oec,Ppc & Teco to FERC, Proposing to Transfer Jurisdictional Transmission Facilities of Firstenergy Operating Companies to American Transmission Sys,Inc.With One Oversize Drawing ML20205J1171999-03-29029 March 1999 Forwards Rev 1 to BAW-2325, Response to RAI Re RPV Integrity, Per GL 92-01,Rev 1,Suppl 1, Reactor Vessel Structural Integrity. Rev Includes Corrected Values in Calculations PY-CEI-NRR-2377, Submits Decommissioning Repts for Bvps,Units 1 & 2,Davis- Besse Nuclear Power Station,Unit 1 & Perry Nuclear Power Plant,Unit 1,per 10CFR50.75(f)(1)1999-03-29029 March 1999 Submits Decommissioning Repts for Bvps,Units 1 & 2,Davis- Besse Nuclear Power Station,Unit 1 & Perry Nuclear Power Plant,Unit 1,per 10CFR50.75(f)(1) ML20205F5961999-03-27027 March 1999 Forwards Comments on Preliminary Accident Sequence Percursor (ASP) Analysis of 980624 Operational Event at Dbnps,Unit 1, as Transmitted by NRC Ltr ML20205D4791999-03-26026 March 1999 Forwards Rept Submitting Results of SG Tube ISI Conducted in Apr 1998.Rept Includes Description of Number & Extent of Tubes Inspected,Location & Percent wall-thickness Penetration for Each Indication of Imperfection ML20205L2031999-03-26026 March 1999 Submits Correction to Dose History of Tj Chambers.Dose Records During 1980-1997 Were Incorrectly Recorded Using Wrong Social Security Number.Nrc Form 5 Not Encl ML20205C7371999-03-25025 March 1999 Certifies That Dbnps,Unit 1,plant-referenced Simulator Continues to Meet Requirements of 10CFR55.45(b) for Simulator Facility Consisting Solely of plant-referenced Simulator.Acceptance Test Program & Test Schedule,Encl ML20205E3551999-03-19019 March 1999 Requests That Proposed Changes to TS 6.8.4.d.2 & TS 6.8.4.d.7 Be Withdrawn from LAR Previously Submitted to NRC ML20204J6361999-03-17017 March 1999 Forwards Firstenergy Corp Annual Rept for 1998 & 1999 Internal Cash Flow Projection as Evidence of Util Guarantee of Retrospective Premiums Which May Be Served Against Facilities PY-CEI-NRR-2375, Forwards List That Details Util Insurers,Policy Numbers & Coverage Limits for Two Power Plants,Per Requirements of 10CFR50.54(w)(3) Re Reporting of Property Insurance Coverage1999-03-15015 March 1999 Forwards List That Details Util Insurers,Policy Numbers & Coverage Limits for Two Power Plants,Per Requirements of 10CFR50.54(w)(3) Re Reporting of Property Insurance Coverage ML20204E6821999-03-12012 March 1999 Requests That Listed Changes Be Made to NRC Document Svc List for Davis-Besse Nuclear Power Station,Unit 1 1999-09-09
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.. 1 CENTEREOR
. ENERGY i
j 5501 N State Fl* vie 2 419-249-2300 John K. Wood Oak Harbor,OH 43449 FAX: 419-321-8337 Vice Prescent - Nuclear Davis Besse j Docket Number 50-346 l i
License Number NPF-3
, Serial Number 1-1121 April 7, 1997 United States Nuclear Regulatory Commission !
Attention: Document Control Desk Washington, D.C. 20555
)
Subject:
Response to NRC Inspection Report Number 50-346/97002 Ladies and Gentlemen: '
Toledo Edison has received Inspection Report 97002 (Log Number 1-3800) and the enclosed ,
Notice of Violation. The Response to the Notice of Violation is attached.
The violation involves the establishment of reliability performance criteria to demonstrate that j the performance or condition of structures, systems, and components was being effectively ,
controlled through adequate preventive maintenance.
I Additionally, as requested in your cover letter, a response is provided for the unresolved item identified in the Inspection Report.
Should you have any questions or require additional information, please contact Mr. James L.
Freels, Manager - Regulatory Affairs, at (419) 321-8466.
F V truly yours, GMW/dle attachment
~
cc: !A. B. Beach, Regional Administrator, NRC Region III A. G. Hansen, NRC Project Manager S. Stasek, DB-1 NRC Senior Resident Inspector Utility Radiological Safety Board 9704230017 970417 PDR ADOCK 05000346 APR 14167 o PDR
4
. . . Il 1
.: . Docket Number 50-346 l l License Number NPF-3 !
! ~ Serial Number 1-1121 l
i Attachment 1
l Page1
]- I
! Reolv to a Notice of Violation (50-346/97002-01IDRSD~ ~
l l AlieEed Violation.
t 1
4
- 10 CFR 50.65(a)(1) requires, in part, that each holder of an operating license under 50.21(b) or 50.22 j shall monitor the performance or condition of structures, systems, or components against licensee ;
I established goals. Such goals shall be established commensurate with safety.
4 i 1
Contrary to the above, as of January 17,1997, the licensee had not established adequate reliability !
j performance criteria for 26 risk-significant systems to demonstrate that the performance or condition
- for some structures, systems, and components were being efibctively controlled through adequate ,
,_ . preventive maintenance. (50-346/97002-Ol[DRS])
s ;
i Renon for Violation Performance criteria were established based on the guidance provided in 10 CFR 50.65, ;
I j " Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants," Regulatory i ,
Guide 1.160, " Monitoring the Effectiveness of Maintenance at Nuclear Power Plants," and NUMARC j 93-01," Industry Guideline for Monitoring the Effectiveness of Maintenance at Nuclear Power j- Plants." The value established for the performance criteria took into account industry experience and I j safety considerations. The effects ofpredicted reliability and the number of expected demands were '
i considered. Also considered was the "Public Workshop to Review the Lessons Lorn 4 dom Early j Implementations of the Maintenance Rule at Nine Nuclear Power Plants," dated June 27,1995, where j the NRC strongly discouraged setting the reliability performance criteria at zero maintenance-
- preventable functional failures. Taking into account all the appropriate considerations, including risk,
- the performance criteria for risk significant systems was set at what was believed to be the most
' conservative value that was acceptable to the NRC.
When this generic industry issue surfaced from the baseline inspections, Toledo Edison evaluated the established performance criteria against performance criteria from other plants that had been determined by the NRC to be commensurate with safety. It was discovered that Davis-Besse's performance criteria were generally two to six times more conservative than those approved at other plants. However, it was incorrectly presumed that a rigorous calculation was not required because of the conservatism of the performance criteria, and that a more simplistic technical basis would suffice.
Corrective Steps Taken and Results Achieved Steps Taken In response to this violation, a calculation (C-NS A-99.16-20) was initiated to determine the effect on core damage frequency (CDF) that results from unavailability and reliability at theinaximum level allowed by the maintenance rule criteria. This calculation also compared the reliability criteria for risk significant systems with the expected number of failures calculated using Probabilistic Risk Assessment (PRA) reliability data. This calculation has been completed and is currently in the
. . i
,. .' Docket Number 50-346 :
i License Number NPF-3 !
l Serial Number 1-1121 .
j Attachment l Page 2 l
. checking and approval process. Based on insights gained from performing this evaluation, several
- changes were made to the reliability criteria. These changes included adding conditional monitoring j for some systems.
i :
j The first part of this calculation was performed by making the following changes to the plant PRA:
} I j (1) Maintenance unavailability assumed in the PRA was replaced with the maximum .
)
i unavailability performance criteria documented in the Maintenance Rule Program Manual. 1 l (2) The reliability performance criteria of the Maintenance Rule Program Manual was used to .i i revise the failure rates of equipment in iisk significant systems. l 3
)
i Two different methods were used to revise the failure rates. One method involved the replacement of the failure rate in the PRA with a simple ratio of the number of failures to the number of demands or i
- run times. This method is simple and provides a very conservative bounding evaluation of the effect l j on CDF, but neglects all past information concerning equipment failure rates. Therefore, an additional )
- l. estimation of the effect on CDF was performed using Bayesian updating of the prior failure rates.
- i. This approach more heavily weights the most recent data without neglecting the past generic and j plant specific information.
j Additionally, the calculation compared the reliability criteria that was established for risk significant j systems with the expected number of failures for each of the systems during a 24 month operating cycle. This part of the evaluation involved calculating the expected number of failures for each of the risk significant systems based on the PRA failure rates and the estimated number of demands or run time for a 24 month operating cycle.
Also, in response to this violation, existing calculation C-NSA-99.16-19 was revised. The existing
- j. revision of this calculation evaluated the effect on CDF from the maintenance unavailability that was j recorded for the period from July 1,1993, to June 30,1996. This calculation was revised to include
[
the effect of functional failures for this time period.
I Results Achieved i i 4 The calculations described above are presently in the review process and have not been formally . l
- approved. However, the following conclusions can be based on the preliminary results.
When the PRA was modified in the calculation (C-NSA-99.16.20) using a simple ratio' of the number ;
[ of failures to demands or run time, this resulted in an increase in CDF of approximately 8.0E-5. It l
. should be noted that the effect on CDF was very dependent on the particular failure that was assumed
{ to occur for each system, but the approach in the calculation was to assume the failure that would have I the greatest effect on the CDF. Considering the criteria in the EPRI PSA Applications Guide, this
! increase in CDF of 8.0E-5 from the base case of 6.57E-5 exceeds the range that is considered non-nsk-significant, but since the change does not exceed 1.0E-4, it would not be considered unacceptable.
- , - = . , _ , .- . , ..r.-- - , , --- --. . - - - , - - - - -, -
. Dacket Number 50-346 License Number NPF-3 Serial Number 1-1121 Attachment Page 3 An increase in the CDF of this magnitude would not be desirable, but tl e CDF calculated using the simple ratio of failures to demands is highly conservative and is a bounding approach rather than a realistic estimation of the effect on CDF for the following reasons:
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(1) All past information concerning failure rates is neglected by this method. For example, if a piece of equipment fails on one start out of twenty during a cycle, the method of using a ratio of failure to demands would assume a five percent failure rate, despite both generic and plant i I specinc data that would indicate a much lower failure rate for that piece of equipment.
l (2) It can be argued that if failures occur each cycle at the reliability criteria rate for each system, i the expected failure rate over an extended period of time would approach the reliability j criteria failure rate. However, this argument assumes the improbable condition where all systems experience repeated failures at the maximum rate allowed by the performance criteria.
1 (3) Most systems have numerous failures that constitute a functional failure modeled in the PRA. However, only one failure mode can be assumed for the PRA revision. This has the effect of overstating the effect of the failure on the CDF. For example, the estimated number of failures for the Makeup System is 1.3 per cycle, which indicates that the functional failure l criteria of 1.0 used for the maintenance rule is conservative. However, in the calculation, the one functional failure could not be split between various pieces of equipment, so a single failure of the makeup pump to mn had to be assumed even though not all functional failures would actually cause the makeup pump to fail to run. This caused the failure rate used in the 3
PRA for the makeup pump to run to increase by a factor of six. The increase in this failure probability has a significant effect on the CDF, despite the fact that the functional failure
- criterion for the makeup system is conservative.
4 As a result of the limitations of the simple ratio method of determining failure rates, this method is
- appropriate only to determine a conservative bounding value of CDF. In this case, the bounding CDF value would be higher than desired but not unacceptable, based on the criteria in the EPRI PSA Applications Guide.
Due to the limitations of the simple ratio approach, Bayesian updating of the existing failure rates was used to provide a more accurate determination of the effect on CDF that results from the maximum acceptable number of functional failures documented in the maintenance rule performance criteria.
This approach updated the equipment failure rate distributions used in the PRA with one cycle of data that assumes functional failures, for all risk significant systems, at the maximum acceptable number from the performance criteria. Using the Bayesian updating approach, the CDF increases approximately 17 percent from the base case of 6.57E-5. The EPRI PSA Applications Guide provides one criterion for evaluating the impact of permanent changes in CDF that is dependent on the baseline CDF. Applying the Davis-Besse baseline, the maximum change in CDF considered to be non-risk-significant is determined to be approximately 12 percent. The change in CDF calculated with the number of functional fcitures and system unavailability at the maximum acceptable per the
.- Docket Number 50-346 License Number NPF-3 l
Serial Number 1-1121 Attachment Page 4 maintenance rule performance criteria exceeds this 12 percent criterion; therefore, the chmge cannot j be considered non-risk significant by this criterion. However, this change is only slightly above the non-risk significant criteria and is not close to the range of approximately 150 percent that is considered to be unacceptable. The EPRI PSA Application Guide recommends further evaluation to I determine if changes in the range identified are acceptable. One method to evaluate the significance of this result is to consider that the maintenance rule performance criteria represent the upper limits of normal operation. It is not expected that all components within the scope of the criteria will operate at i orjust below these levels. This conclusion is supported by the results of a separate calculation (C-NSA-99.16-19, revision 2) which calculated the CDF using the unavailability and failure data from l July 1,1993, to June 30,1996. This evaluation shows a CDF decrease from the base case value of ;
approximately 13 percent. i l
Calculation C-NSA-99.16-20 also calculated the expected number of failures for each of the risk significant systems. The results of this calculation indicate that the maintenance rule criteria appear to i be generally appropriate for risk significant systems although nct all systems are modeled in the PRA to the level of detail required to make this comparison. For several important systems, including Auxiliary Feedwater, Emergency Diesel Generators and Essential AC Electrical Power, the number of failures per cycle predicted using PRA data significantly exceeds the maximum acceptable number of functional failures per the maintenance rule performance criteria. For only one system, the High Pressure Injection System, the results of the calculation indicated a predicted number of failures that was less than the criteria by a substantial margin. For this system, the calculated number of failures was approximately one every four cycles, which is less than the original criteria of one failure per cycle. The High Pressure Injection System performance criterion was changed to one failure every four cycles.
Corrective Stens to Avoid Further Violations l
The calculation evaluating the reliability performance criteria for risk significant systems (C-NSA-I 99.16-20) will be maintained, as appropriate, to demonstrate that the performance criteria and goals are commensurate with safety.
To ensure the continued demonstration that the condition of structures, systems, and components is !
effectively controlled through adequate preventive maintenance, the procedure governing the Periodic )
Maintenance Effectiveness Assessment Report was revised on March 5,1997. Future Periodic 1 Maintenance Effectiveness Assessment Reports will include an assessment of the risk impact of the j observed equipment reliability and availability for the cycle, pate When Full Comnliance Will Be Achieved The calculation doctunenting that the reliability performance criteria for risk significant systems are commensurate with safety (C-NSA-99.16-20) will be approved by May 30,1997.
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. *. docket Number 50-346
- License Number NPF-3 i Scrial Number 1-1121
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- Additional Resnonse Information 4
In NRC Inspection report 50-346/97002(DRS), the NRC identified one unresolved item. This unresolved item,50-346/97002-02(DRS), documents an NRC concern with the monitoring of structures. There were two areas of concern identified as part of this open item. The first issue is that j
the portion of the baseline walk-down of structures performed by Mechanical / Structural Unit of l Design Basis Engineering does not include supports contained within the building. Credit is being j taken for previously completed walk-downs to the maximum extent practical for the baseline inspection. The Seismic Qualification Utility Group (SQUG) and the Individual Plant Examination of j
External Events (IPEEE) walk-downs consisted of 616 pieces of electrical and mechanical equipment, cable trays, conduit supports, and yard tanks. These walk-downs, performed from 1993 to 1995, ]
i
{ consisted of detailed reviews of the anchorage and foundation of equipment, as well as any potential j 3 seismic interaction concerns directly above the equipment. Considering this sample size, it is concluded that the eqtipment, cable trays, and conduits are adequately baselined. In addition, all l
l nuclear safety related and seismic category 1 piping systems within the scope ofIE Bulletin 79-14 l
- were re-inspected during the period 1985 to 1989. Based on this effort, the nuclear safety-related and j seismic category 1 piping supports have been adequately baselined. However, as the baseline
- . inspections and System Engineering walk-downs continue, the current condition of the structures i
within the scope of the maintenance rule, as well as the supports contained within the buildings, will j be evaluated. ;
! Tne second issue associated with this unresolved item involves the dispositioning ofstructures within j the maintenance rule from (a)(1) to (a)(2) and from (a)(2) to (a)(1). Guideline DG-26, " Design
] Guideline for Maintenance Rule Evaluation of Structures," contains criteria similar to that contained
, in the memorandum " Summary ofJanuary 9,1997, meeting with the Nuclear Energy Institute (NEI)
!- on Maintenance Rule Issues" dated February 4,1997. When revision 2 of Regulatory Guide 1.160,
! " Monitoring the Effectiveness of Maintenance at Nuclear Power Plants" is issued, the related procedural guidance for structural aspects of Davis-Besse's Maintenance Rule Program will be reviewed to ensure they are in compliance with the new guidance and that a clear method exists for the
- expert panel to disposition structures from (a)(1) to (a)(2) and from (a)(2) to (a)(1).