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Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO
MONTHYEARML18022B0421998-05-14014 May 1998
Special Rept:On 970719,declared Channel 751 of Digital Metal Impact Monitoring Sys Monitors Inoperable.Caused by Noise Originating in Channel 751 pre-amplifier/accelerometer Sensor Located in Containment.Channel 751 in Containment
ML18012A4101996-10-23023 October 1996
Ro:On 960916,fish Kill Occurred in Harris Lake.Caused by Heavy Precipitation That Accompanied Hurricane Fran.Will Perform Monitoring of Dissolved Oxygen Concentrations to Document Return of Sufficient Oxygen to Aquatic Life
ML18011B1271996-02-0505 February 1996
Special Rept:On 951105,actuation of ECCS & Subsequent Injection of Water Into RCS Occurred.Unusual Event (Ue) Declared Due to ECCS Actuation & Ue Exited Based on Termination of SI & Stabilization of Plant in Mode-3
ML18022A9751995-10-0505 October 1995
Special Rept,Identifying Number of SG Tubes Plugged as Result of Recent SG Tube ISI Conducted During Refueling Outage 6
ML18011B0091995-09-0505 September 1995
Special Rept:On 950817,WPB Stack 5A WRGM Was Declared Inoperable to Allow for Testing of Associated Stack 5A Exhaust Flow Rate Monitor.Monitor Returned to Svc on 950825
ML18011A2241993-10-27027 October 1993
Special Rept:On 930928,identified That 10 Used Incore Detectors Not Accounted For.Most Probable Disposition Is That Detectors Inadvertently Mixed W/Other LLW Matl & Shipped to Seg in Apr 1993.Procedures FMP-108 & 109 Revised
ML18010B1291993-07-12012 July 1993
Special Rept:On 930621,violation of TS 3.3.3.6 Occurred Due to Time Required to Install New Operating System for Inoperable RCS Subcooling Margin Monitor & Pressurizer Safety Valve Position Indication Sys
ML18010A6311992-05-0808 May 1992
Special Rept:On 920420,RCS Subcooling Monitor Declared Inoperable to Install New & Improved Disk Drives in ERF Info Sys.Monitor Out of Svc for More than 7 Days.New Disk Drives & Circuit Board Upgrade Completed by Vendor on 920412
ML18010A3671991-08-15015 August 1991
Special Rept:On 910706,seismic Monitoring Sys Declared Inoperable.Caused by Unsatisfactory Surveillance Test Results.Maint Calibration Procedure & Operations Surveillance Test Performed Satisfactorily
ML18009A9391991-06-14014 June 1991
Special Rept:On 910528,stack 5 Exhaust Sys Radiation Monitor Declared Inoperable When Monitor Removed from Svc to Perform Test Procedure.Caused by Failed Capacitor.Capacitor Replaced
ML18009A9361991-06-14014 June 1991
Special Rept:On 910516,plant Experienced LTOP Event While RCS Operated Under Solid Water Conditions.Actuation of LTOP Sys Resulted from Pressure Induced by Start of Reactor Coolant Pump
ML18009A7041990-10-11011 October 1990
Special Rept:On 900922,main Steam Line Radiation Monitor Declared Inoperable Due to Communication Failure
ML18022A7541990-01-15015 January 1990
Special Rept:On 891223,reactor Coolant Subcooling Monitor Declared Inoperable Due to Erratic Indications & Out of Svc Beyond 7-day Time Limit in Spec 6.9.2.Caused by Normal End of Life of Data Isolator Board.Board Replaced on 900103
ML18009A3331990-01-0505 January 1990
Special Rept:On 891220,plant Vent High Range Noble Gas Monitor RM-21AV-3509-1SA Declared Inoperable When Monitor Found to Be Out of Calibr During Performance of Test Procedure.Caused by Detector Being Out of Calibr
ML18005B1201989-10-13013 October 1989
Special Rept:On 890904,seismic Monitor Sys Declared Inoperable Due to Seismic Annunciator Panel in Main Control Room Had Annunciators Lit for No Apparent Reason.Cause Believed to Be Defective Logic Board.Repairs Made by Vendor
ML18005A6051988-09-19019 September 1988
Special Rept:On 880912,first Inservice Insp of Steam Generators Completed,Per Tech Specs 4.4.5.5.a & 6.9.2. Reporting Requirements of IE Bulletin 88-002 Will Be Submitted Under Separate Cover
ML18005A5861988-09-0808 September 1988
Suppl to Special Rept:On 880412,vent Stack 5A Wide Range Gas Monitor 1WV-3547-1 Declared Inoperable.Initially Reported on 880502.Plant Calibr Procedure Revised Incorporating Changes Recommended by Vendor & Sample Flow Transmitter Calibr
ML18022A6441988-05-0202 May 1988
Special Rept:On 880412,vent Stack 5A wide-range Gas Monitor Declared Inoperable.Caused by Loss of Sample Flow That Would Occur While Attempting Calibr of Sample Flow Transmitter. Correct low-range Flow Transmitter Ordered
ML18005A2861988-02-0505 February 1988
Special Rept:On 880118,main Steam Line Radiation Monitor C Failed to Adequately Respond to Routine Source Check.Caused by Source Sticking in Partially Inserted Position.Work Request Initiated to Repair Monitor
ML18022A6001988-01-0404 January 1988
Special Rept:On 871102,vent Stack 5A Wide Range Gas Radiation Monitor Inoperable.Caused by Potential Loss of Sample Flow Due to Calibr of Transmitter & iso-kinetic Sampling Skid.Mass Flow Meter Replaced
ML18022A6011988-01-0404 January 1988
Special Rept:On 871212,waste Processing Bldg Vent Stack 5 Wide Range Gas Monitor Declared Inoperable in Excess of 7 Days.Caused by Defective photo-multiplier Tube on Low Range Channel.Tube Replaced
ML18022A5731987-10-15015 October 1987
Special Rept:On 870924,vent Stack Wide Range Gas Monitor RM-3536-1 Declared Inoperable Due to Loss of Process Control.Caused by Equipment Failure.Flow Sensing Elements Removed & Cleaned to Remove Corrosion
ML18004B8551987-06-15015 June 1987
Special Rept:On 870523,turbine Bldg Vent Stack wide-range Gas Monitor RM-35361-1 Declared Inoperable Due to Loss of Process Flow.Caused by Shorted Sensing Element.Element & Current Card Adjusted & Calibr
ML18004B7541987-04-0303 April 1987
Special Rept:On 870305,util Notified by Sorrento Electronics of Environ Qualification Problem W/Interconnecting Cable on Digital high-range Radiation Monitors.Caused by Misapplication of Cable by Vendor.Alternate Monitor Used
1998-05-14
[Table view]
Category:LER)
MONTHYEARML18022B0421998-05-14014 May 1998
Special Rept:On 970719,declared Channel 751 of Digital Metal Impact Monitoring Sys Monitors Inoperable.Caused by Noise Originating in Channel 751 pre-amplifier/accelerometer Sensor Located in Containment.Channel 751 in Containment
ML18012A4101996-10-23023 October 1996
Ro:On 960916,fish Kill Occurred in Harris Lake.Caused by Heavy Precipitation That Accompanied Hurricane Fran.Will Perform Monitoring of Dissolved Oxygen Concentrations to Document Return of Sufficient Oxygen to Aquatic Life
ML18011B1271996-02-0505 February 1996
Special Rept:On 951105,actuation of ECCS & Subsequent Injection of Water Into RCS Occurred.Unusual Event (Ue) Declared Due to ECCS Actuation & Ue Exited Based on Termination of SI & Stabilization of Plant in Mode-3
ML18022A9751995-10-0505 October 1995
Special Rept,Identifying Number of SG Tubes Plugged as Result of Recent SG Tube ISI Conducted During Refueling Outage 6
ML18011B0091995-09-0505 September 1995
Special Rept:On 950817,WPB Stack 5A WRGM Was Declared Inoperable to Allow for Testing of Associated Stack 5A Exhaust Flow Rate Monitor.Monitor Returned to Svc on 950825
ML18011A2241993-10-27027 October 1993
Special Rept:On 930928,identified That 10 Used Incore Detectors Not Accounted For.Most Probable Disposition Is That Detectors Inadvertently Mixed W/Other LLW Matl & Shipped to Seg in Apr 1993.Procedures FMP-108 & 109 Revised
ML18010B1291993-07-12012 July 1993
Special Rept:On 930621,violation of TS 3.3.3.6 Occurred Due to Time Required to Install New Operating System for Inoperable RCS Subcooling Margin Monitor & Pressurizer Safety Valve Position Indication Sys
ML18010A6311992-05-0808 May 1992
Special Rept:On 920420,RCS Subcooling Monitor Declared Inoperable to Install New & Improved Disk Drives in ERF Info Sys.Monitor Out of Svc for More than 7 Days.New Disk Drives & Circuit Board Upgrade Completed by Vendor on 920412
ML18010A3671991-08-15015 August 1991
Special Rept:On 910706,seismic Monitoring Sys Declared Inoperable.Caused by Unsatisfactory Surveillance Test Results.Maint Calibration Procedure & Operations Surveillance Test Performed Satisfactorily
ML18009A9391991-06-14014 June 1991
Special Rept:On 910528,stack 5 Exhaust Sys Radiation Monitor Declared Inoperable When Monitor Removed from Svc to Perform Test Procedure.Caused by Failed Capacitor.Capacitor Replaced
ML18009A9361991-06-14014 June 1991
Special Rept:On 910516,plant Experienced LTOP Event While RCS Operated Under Solid Water Conditions.Actuation of LTOP Sys Resulted from Pressure Induced by Start of Reactor Coolant Pump
ML18009A7041990-10-11011 October 1990
Special Rept:On 900922,main Steam Line Radiation Monitor Declared Inoperable Due to Communication Failure
ML18022A7541990-01-15015 January 1990
Special Rept:On 891223,reactor Coolant Subcooling Monitor Declared Inoperable Due to Erratic Indications & Out of Svc Beyond 7-day Time Limit in Spec 6.9.2.Caused by Normal End of Life of Data Isolator Board.Board Replaced on 900103
ML18009A3331990-01-0505 January 1990
Special Rept:On 891220,plant Vent High Range Noble Gas Monitor RM-21AV-3509-1SA Declared Inoperable When Monitor Found to Be Out of Calibr During Performance of Test Procedure.Caused by Detector Being Out of Calibr
ML18005B1201989-10-13013 October 1989
Special Rept:On 890904,seismic Monitor Sys Declared Inoperable Due to Seismic Annunciator Panel in Main Control Room Had Annunciators Lit for No Apparent Reason.Cause Believed to Be Defective Logic Board.Repairs Made by Vendor
ML18005A6051988-09-19019 September 1988
Special Rept:On 880912,first Inservice Insp of Steam Generators Completed,Per Tech Specs 4.4.5.5.a & 6.9.2. Reporting Requirements of IE Bulletin 88-002 Will Be Submitted Under Separate Cover
ML18005A5861988-09-0808 September 1988
Suppl to Special Rept:On 880412,vent Stack 5A Wide Range Gas Monitor 1WV-3547-1 Declared Inoperable.Initially Reported on 880502.Plant Calibr Procedure Revised Incorporating Changes Recommended by Vendor & Sample Flow Transmitter Calibr
ML18022A6441988-05-0202 May 1988
Special Rept:On 880412,vent Stack 5A wide-range Gas Monitor Declared Inoperable.Caused by Loss of Sample Flow That Would Occur While Attempting Calibr of Sample Flow Transmitter. Correct low-range Flow Transmitter Ordered
ML18005A2861988-02-0505 February 1988
Special Rept:On 880118,main Steam Line Radiation Monitor C Failed to Adequately Respond to Routine Source Check.Caused by Source Sticking in Partially Inserted Position.Work Request Initiated to Repair Monitor
ML18022A6001988-01-0404 January 1988
Special Rept:On 871102,vent Stack 5A Wide Range Gas Radiation Monitor Inoperable.Caused by Potential Loss of Sample Flow Due to Calibr of Transmitter & iso-kinetic Sampling Skid.Mass Flow Meter Replaced
ML18022A6011988-01-0404 January 1988
Special Rept:On 871212,waste Processing Bldg Vent Stack 5 Wide Range Gas Monitor Declared Inoperable in Excess of 7 Days.Caused by Defective photo-multiplier Tube on Low Range Channel.Tube Replaced
ML18022A5731987-10-15015 October 1987
Special Rept:On 870924,vent Stack Wide Range Gas Monitor RM-3536-1 Declared Inoperable Due to Loss of Process Control.Caused by Equipment Failure.Flow Sensing Elements Removed & Cleaned to Remove Corrosion
ML18004B8551987-06-15015 June 1987
Special Rept:On 870523,turbine Bldg Vent Stack wide-range Gas Monitor RM-35361-1 Declared Inoperable Due to Loss of Process Flow.Caused by Shorted Sensing Element.Element & Current Card Adjusted & Calibr
ML18004B7541987-04-0303 April 1987
Special Rept:On 870305,util Notified by Sorrento Electronics of Environ Qualification Problem W/Interconnecting Cable on Digital high-range Radiation Monitors.Caused by Misapplication of Cable by Vendor.Alternate Monitor Used
1998-05-14
[Table view]
Category:TEXT-SAFETY REPORT
MONTHYEARML18017A9181999-10-0808 October 1999
LER 99-008-00:on 991008,CR Emergency Filtration Sys Tech Specs Occurred.Caused by Site Personnel Failed to Recognize That Blocking Open CR Emergency Filtration Sys.Procedures Revised.With 991008 Ltr
ML18017A9151999-09-30030 September 1999
Monthly Operating Rept for Sept 1999 for Shearon Harris Npp. with 991012 Ltr
ML20217A9931999-09-30030 September 1999
NRC Regulatory Assessment & Oversight Pilot Program, Performance Indicator Data
ML18017A8671999-09-10010 September 1999
LER 99-007-00:on 990811,determined That Cvis ARMs High Alarm Setpoints Were Not within TS Limit.Caused by Not Having Procedure to Verify If Cvis ARM High Alarm Setpoints Were within TS Requirements.Revised Procedures.With 990910 Ltr
ML18017A8621999-08-31031 August 1999
Monthly Operating Rept for Aug 1999 for Harris Nuclear Plant.With 990908 Ltr
ML18016B0481999-08-0404 August 1999
LER 99-006-01:on 981124,noted Failure to Comply with TS 4.0.4 & TS 3/4.6.3, Civs. Caused by post-maint Testing That Did Not Adequately Test Control Circuitry & Verify Isolation Time Following Maint.Procedure Was Revised
ML18017A8361999-07-31031 July 1999
Monthly Operating Rept for July 1999 for Shearon Harris Nuclear Power Plant.With 990811 Ltr
ML18016B0151999-06-30030 June 1999
Monthly Operating Rept for June 1999 for Shearon Harris Npp. with 990713 Ltr
ML20196H8621999-06-30030 June 1999
NRC Regulatory Assessment & Oversight Pilot Program, Performance Indicator Data, June 1999 Rept
ML18016A9801999-06-0404 June 1999
LER 99-006-00:on 981124,failed to Comply with TS 4.0.4 & TS 3/4.6.3, Civ. Caused by post-maint Testing That Did Not Adequately Test Control Circuitry & Verify Isolation Time Following Maint.Procedure Will Be Revised.With 990604 Ltr
ML18016A9851999-05-31031 May 1999
Monthly Operating Rept for May 1999 for Shearon Harris Nuclear Plant,Unit 1.With 990614 Ltr
ML18017A8981999-05-12012 May 1999
Technical Rept Entitled, Harris Nuclear Plant-Bacteria Detection in Water from C&D Spent Fuel Pool Cooling Lines.
ML18016A9581999-04-30030 April 1999
Monthly Operating Rept for Apr 1999 for Shearon Harris Nuclear Plant,Unit 1.With 990513 Ltr
ML18016A9011999-04-12012 April 1999
Part 21 Rept Re Defect in Component of DSRV-16-4,Enterprise DG Sys.Caused by Potential Problem with Connecting Rod Assemblies Built Since 1986,that Have Been Converted to Use Prestressed Fasteners.Affected Rods Should Be Inspected
ML18016A9111999-04-12012 April 1999
LER 99-005-00:on 990313,plant Exceeded ESFAS TS 3.3.2,Action 21.Caused by Inadequate Procedure Rev Preparation.Licensee Revised Applicable Maint Surveillance Test Procedure (MST-10072) to Identify TS Required Actions.With 990412 Ltr
ML18016A8971999-04-0808 April 1999
LER 99-004-00:on 990312,unit Trip Was Noted.Caused by Degraded Condition of SG Water Level Flow Control Valve. Replaced Positioners on All Three FW Regulating Valves.With 990408 Ltr
ML18016A8941999-04-0505 April 1999
Revised Pages 20-25 to App 4A of non-proprietary Version of Rev 3 to HI-971760
ML18016A9101999-03-31031 March 1999
Monthly Operating Rept for Mar 1999 for Shearon Harris Nuclear Power Plant.With 990413 Ltr
ML18016A8661999-03-31031 March 1999
Shnpp Operator Training Simulator,Simulator Certification Quadrennial Rept.
ML18017A8931999-02-28028 February 1999
Risks & Alternative Options Associated with Spent Fuel Storage at Shearon Harris Nuclear Power Plant.
ML18016A8551999-02-28028 February 1999
Monthly Operating Rept for Feb 1999 for Shearon Harris Npp. with 990312 Ltr
ML18016A8261999-02-22022 February 1999
LER 99-003-00:on 990123,noted That Plant Was Outside Design Basis Due to Isolation of Fire Protection Containment Sprinkler Sys.Caused by Human Error.Restored Containment Sprinkler Sys to Operable Status.With 990222 Ltr
ML18016A8531999-02-18018 February 1999
Non-proprietary Rev 3 to HI-971760, Licensing Rept for Expanding Storage Capacity in Harris SFP 'C' & 'D'.
ML18016A8111999-02-12012 February 1999
LER 99-002-00:on 990114,RT Due to Not Removing Temporary Device from Relay Following Calibration Was Noted.Caused by Human Error.Counseled Personnel Involved in Event.With 990212 Ltr
ML18016A7971999-02-0505 February 1999
LER 99-001-00:on 990106,SF Pool Water Level Was Not Maintained Greater than 23 Feet Above Stored BWR Fuel Assemblies.Caused by Fasteners Bending Under Specific Circumstances.Increased Water Level.With 990205 Ltr
ML18022B0631999-02-0404 February 1999
Rev 0 to Nuclear NDE Manual. with 28 Oversize Uncodable Drawings of Alternative Plan Scope & 4 Oversize Codable Drawings
ML20202J1161999-02-0101 February 1999
SER Accepting Relief Requests Associated with Second 10-year Interval Inservice Testing Program
ML18016A8041999-01-31031 January 1999
Monthly Operating Rept for Jan 1999 for Shearon Harris Nuclear Power Plant.With 990211 Ltr
ML18016A7941999-01-29029 January 1999
LER 98-004-01:on 980313,identified Design Deficiency Re Potential Runout of Tdafwp.Caused by Inadequate Original AFW Sys Design.Operability Evaluation Was Completed on 980313 & Addl Engineering Analysis Was Performed by Vendor
ML18016A7801998-12-31031 December 1998
Monthly Operating Rept for Dec 1998 for Shearon Harris Npp. with 990113 Ltr
ML18016A7671998-11-30030 November 1998
Monthly Operating Rept for Nov 1998 for Shnpp,Unit 1.With 981215 Ltr
ML18016A9731998-11-28028 November 1998
Changes,Tests & Experiments, for Harris Nuclear Plant.Rept Provides Brief Description of Changes to Facility & Summary & of SE for Each Item That Was Implemented Under 10CFR50.59 Between 970608-981128.With 990527 Ltr
ML18016A8351998-11-28028 November 1998
ISI Summary 8th Refueling Outage for Shearon Harris Power Plant,Unit 1.
ML18016A7411998-11-25025 November 1998
Rev 1 to Shnpp Cycle 9 Colr.
ML18016A7211998-11-17017 November 1998
LER 98-007-00:on 981023,turbine Control Anomaly Caused Manual Rt.Caused by Failure to Incorporate Verbal Vendor Guidance in Operating Procedures.Addl Vendor Guidance Will Be Verified & Added to Procedures.With 981117 Ltr
ML18016A7071998-11-0303 November 1998
Rev 0 to Harris Unit 1 Cycle 9 Colr.
ML18016A7201998-10-31031 October 1998
Monthly Operating Rept for Oct 1998 for Shearon Harris Nuclear Power Plant.With 981113 Ltr
ML20154F8701998-10-0606 October 1998
Safety Evaluation Authorizing Proposed Alternative to Requirements of OMa-1988,Part 10,Section 4.2.2.3 for 21 Category a Reactor Coolant Sys Pressure Isolation Valves
ML18016A6201998-09-30030 September 1998
Monthly Operating Rept for Sept 1998 for Harris Nuclear Power Plant.With 981012 Ltr
ML18016A5971998-09-21021 September 1998
Rev 1 to Harris Unit 1 Cycle 8 Colr.
ML18016A5881998-08-31031 August 1998
Monthly Operating Rept for Aug 1998 for Shnpp,Unit 1.With 980914 Ltr
ML18016A5071998-07-31031 July 1998
Monthly Operating Rept for Jul 1998 for Shearon Harris Nuclear Plant.W/980811 Ltr
ML18016A9431998-07-0707 July 1998
Rev 1 to QAP Manual.
ML18016A4841998-07-0707 July 1998
LER 97-002-01:on 970207,determined That Cold Weather Conditions Resulted in Mfiv Being Potentially Inoperable During Period 970117-20.Caused by Inadequate Design of HVAC Sys.Implemented Mods to Steam Tunnel HVAC Sys
ML18016A9371998-06-30030 June 1998
Technical Rept on Matl Identification of Spent Fuel Piping Welds at Hnp.
ML18016A4861998-06-30030 June 1998
Monthly Operating Rept for June 1998 for SHNPP.W/980715 Ltr
ML18016A4701998-06-30030 June 1998
LER 97-021-03:on 980210,discovered That SFP Water Level Had Not Been Verified Greater than 23 Feet Above BWR Fuel Assemblies.Caused by Misinterpretation of TS Requirements. Will Submit TS Change Request to Revise TS 3.9.1.11
ML18016A4491998-06-0808 June 1998
LER 98-006-00:on 980508,failure to Perform Insp & Preventive Maint on MCCB as Required by TS Was Noted.Caused by Inadequate Sps.Tested 9 Pressurizer Heater Bank Breakers by Cycling each.W/980608 Ltr
ML18016A4521998-05-31031 May 1998
Monthly Operating Rept for May 1998 for Shearon Harris Nuclear Power Plant.W/980612 Ltr
ML18016A7711998-05-26026 May 1998
Non-proprietary Rev 2 to HI-971760, Licensing Rept for Expanding Storage Capacity in Harris Spent Fuel Pools 'C' & 'D'.
1999-09-30
[Table view] |
Text
CATEGORY 3g REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:9805210058 DOC.DATE: 98/05/14 NOTARIZED: NO DOCKET ¹ FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina 05000400 AUTH.NAME, AUTHOR AFFILIATION DONAHUE,J.W. Carolina Power 5: Light Co.
RECIP . NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Special rept:on 970719,declared. Channel 751 of digital metal impact monitoring sys monitors inoperable. Caused by noise originating in Channel 751 pre-amplifier/accelerometer sensor located in containment. Channel 751 in containment.
DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:
TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.
NOTES:Application for permit renewal filed. 05000400 G
RECIPIENT COPIES RECIPIENT COPIES 0
ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-1 PD FLANDERS,S INTERNAL: ACR S AEO 2 AEOD/S PD/RRAB LE CENTE 1 NRR/DE/ECGB NRR DE '1 NRR/DE/EMEB NRR/DRCH/HHFB 1, NRR/DRCH/HICB NRR/DRCH/HOLB 1 NRR/DRCH/HQMB NRR/DRPM/PECB NRR/DSSA/SPLB NRR/DSSA/SRXB 1 RES/DET/EIB RGN2 FILE 01 1 D EXTERNAL: L ST LOBBY WARD LITCO BRYCE, J H 0 NOAC POORE,W. NOAC QUEENER,DS NRC PDR NUDOCS FULL TXT U
E N
NOTE TO ALL "RIDS" RECIPZENTS:
PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD) ON EXTENSION 415-2083 TOTAL NUMBER OF COPTES REQUIRED: LTTR 25 ENCL
Carolina Power & Ught Company Hanis Nuclear Plant P.O. Box 165 New Hill NC 27562 MAY 14 1998 U.S. Nuclear Regulatory Commission Serial: HNP-98-073 ATTN: NRC Document Control Desk Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT UNIT I DOCKET NO. 50-400 LICENSE NO. NPF-63 Sir or Madam:
In accordance with Technical Specification 3.3.3.9 and 6.9.2 for the Shearon Harris Nuclear Power Plant, this Special Report is submitted concerning an inoperable Metal Impact Monitoring System channel.
Sincerely, J. W. Donahue Director of Site Operations Harris Plant MV Enclosure c: Mr. J. B. Brady (HNP Senior NRC Resident)
Mr. L. A. Reyes (NRC Regional Administrator, Region II)
Mr. S. C. Flanders (NRC - NRR Project Manager) 5413 Sheoron Harris Road New Hill NC
'\ ~
~ s d
'st8052i 0058 sst805i 4 PDR ADQCK 05000400 8 PDR
Channel ¹ 751 of the Digital Metal Impact Monitoring System (DMIMS) monitors the "Reactor Vessel Upper" collection region.'n July 1997, intermittent noise was experienced in the DMIMS Main Control Room Cabinet and the channel was declared inoperable on July 19, 1997. Troubleshooting determined that the most probable source of this noise was the Channel ¹751 pre-amplifier/accelerometer sensor located in containment. To eliminate this source of intermittent noise and enhance the operational reliability of DMIMS during plant full power operation, a temporary plant modification was developed to lift the cable leads for this sensor from the back of the Main Control Room DMIMS cabinet. By lifting these leads the Channel ¹751 pre-amplifier/accelerometer sensor was separated from the system eliminating the source of noise.
This channel was considered to be a spare and was not being used to monitor the presence of a loose part or to detect metal impact. The redundant'hannel (Channel ¹750) for the "Reactor Vessel Upper" collection region has remained fully operational. Based on the guidance of Regulatory Guide 1.133, this condition was not originally considered as an inoperable DMIMS "channel". However, following additional review and application of the literal meaning of the Technical Specification LCO, it was determined that the channel ¹751 inoperability was reportable. Therefore, this Special Report is provided since channel ¹751 was inoperable for greater than thirty days.
The channel ¹751 pre-amplifier/accelerometer sensor is located in containment. Work tickets have been generated to resolve the intermittent noise condition which will allow removal of the temporary modification (lifted leads). This work will take place while the plant is shutdown during the next refueling outage, which is currently scheduled to begin October 1998.
