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Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO LER)
MONTHYEARML20199J8551997-11-24024 November 1997
Special Rept 2-SR-97-001:on 971025,RCS Pressure Transient Resulted in Automatic Actuation of Pressurizer Porv.Caused by Operator Misconception Over Actual Arming Setpoint of LTOP Sys.Alarm Procedures Will Be Revised
ML20083R7491995-05-22022 May 1995
Special Rept 1-SR-95-002:on 950505,lightning Strike Damaged Meteorological Instrumentation at Primary & Backup Towers
ML20078A3221995-01-12012 January 1995
Special Rept:On 941222,unit 1 Train a EDG Tripped.Caused by Internal Oil Leak of Trip Device Bypassed in Emergency Operating Mode.Trip Device Replaced W/New,Calibr Pressure Switch
ML20058C0011993-11-18018 November 1993
Ro:On 931117,unusual Event Declared Due to Loss of All Primary & Backup Meteorological Sys Instruments.Caused by Lightning Strike Damaging back-up Tower Instruments.Local Natl Weather Svc Contacted
ML20101L2991992-06-29029 June 1992
Special Rept 1-SR-92-001-00:on 920528,engine Trip Occurred Due to Apparent High Vibration at Engine Rear Vibration Sensor.Caused by Low Lube Oil Pressure.Sensor & Related Components Replaced
ML20101D2201992-06-0404 June 1992
Ro:On 920603,control Room Alarms Annunicated Loss of One of Two Compressors in Train a of Control Room HVAC Sys.Caused by Low Oil Pressure in Compressor.Both Trains of Control Room HVAC Sys Restored to Svc & Declared Operable
ML20092F0281992-02-13013 February 1992
Special Rept 1-SR-90-002-01:on 900221,RCS Transient Resulted in Automatic Actuation of Porv.Caused by Insufficient Letdown Flow.Repetitive Step of Differing Plant Responses Expected Eliminated
ML20062F8251990-11-20020 November 1990
Ro:On 901118,control Room Alarms Annunciated Failure of Inverter Associated W/One of Four 118-volt Ac Safeguards Instrument Buses.Caused by Failed Components within Scr/Diode Assembly
ML20058C5131990-10-29029 October 1990
Special Rept SR-1-90-007-00:on 900726,charging Flow Diverted Through Safety Injection Line Due to Personnel Error. Operator Counseled.Procedures Reviewed for Accuracy
ML20056A1691990-07-31031 July 1990
Ro:On 900730,ESFAS Occurred Which Resulted in Initiation of Safety Injection Followed by lo-lo Steam Generator Level Reactor Trip Signal.Caused by Potential Problem W/Emergency Lighting.Actions to Prevent Recurrence Will Be Determined
ML20056A0821990-07-27027 July 1990
Ro:On 900726,ESF Actuation Signal Occurred Which Resulted in Initiation of Safety Injection.Cause Indeterminate.Plant Restored to Stable Condition
ML20236T9321987-10-27027 October 1987
Special Rept:On 870831,Train a Safety Injection Occurred During Performance of Bimonthly Surveillance of solid-state Protection Sys.Caused by Cognitive Personnel Error.Emergency Procedure 2BEP-0 Entered & Exited When Plant Stabilized
1997-11-24
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Category:TEXT-SAFETY REPORT
MONTHYEARML20217E8021999-10-0707 October 1999
CPSES Unit 1 Cycle 8 Colr
ML20217G4151999-09-30030 September 1999
Monthly Operating Repts for Sept 1999 for Cpses,Units 1 & 2
ML20212F7671999-09-24024 September 1999
SER Granting Relief Request C-4 Pursuant to 10CFR50.55a(g)(6)(i) for Unit 2,during First 10-year ISI Interval & Relief Requests B-15,B-16 & B-17 Pursuant to 10CFR50.55a(g)(6)(i)
ML20216J5701999-09-16016 September 1999
Rev 2 to CPSES Unit 2 Cycle 5 Colr
TXX-9920, Monthly Operating Repts for Aug 1999 for Cpses.With1999-08-31031 August 1999
Monthly Operating Repts for Aug 1999 for Cpses.With
ML20211M2981999-08-0606 August 1999
Rev 1 to CPSES Fuel Storage Licensing Rept, CPSES Credit for Soluble Boron & Expansion of Spent Fuel Storage Capacity, Consisting of Revised Title Page and 4-1
ML20210U4081999-07-31031 July 1999
Monthly Operating Repts for July 1999 for Cpses,Units 1 & 2
ML20210D8321999-07-23023 July 1999
Safety Evaluation Accepting Relief Requests Re Use of 1998 Edition of Subsections IWE & Iwl of ASME Code for Containment Insp
ML20209H7661999-07-15015 July 1999
Safety Evaluation Accepting GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, for Comanche Peak Steam Electric Station,Units 1 & 2
ML20209H2721999-07-0909 July 1999
2RF04 Containment ISI Summary Rept First Interval,First Period,First Outage
ML20209H2631999-07-0909 July 1999
2RF04 ISI Summary Rept First Interval,Second Period,Second Outage
ML20209G7501999-07-0808 July 1999
SER Finding That Licensee Individual Plant Exam of External Events Complete with Regard to Info Requested by Suppl 4 to GL 88-20 & That IPEEE Results Reasonable Given Design, Operation & History of Comanche Peak Steam Electric Station
ML20196L0191999-07-0808 July 1999
Safety Evaluation Granting Request Relief B-6 (Rev 2),B-7 (Rev2),B-12,B-13,B-14 & C-9,pursuant to 10CFR50.55a(g)(6)(i).Technical Ltr Rept Also Encl
ML20210J9391999-06-30030 June 1999
CPSES Commitment Matl Change Evaluation Rept 0003,for 970802-990630
ML20209G0801999-06-30030 June 1999
Monthly Operating Repts for June 1999 for Cpses,Units 1 & 2
ML20196J0621999-06-29029 June 1999
Safety Evaluation Supporting Proposed Changes to Emergency Plan Re Licenses NPF-87 & NPF-89 Respectively
ML20195G5141999-05-31031 May 1999
Monthly Operating Repts for May 1999 for Comanche Peak Steam Electric Station,Units 1 & 2.With
ML20216E0711999-05-21021 May 1999
1999 Graded Exercise - Comanche Peak Steam Electric Station
ML20206Q0091999-05-14014 May 1999
Safety Evaluation Accepting GL 92-08, Thermo-Lag 330-1 Fire Barriers, Dtd 921217,for Comanche Peak Electric Station,Unit 1
ML20206H2061999-05-0606 May 1999
SER Accepting Exemption to App K Re Leading Edge Flowmeter for Plant,Units 1 & 2
ML20196L2241999-04-30030 April 1999
Monthly Operating Repts for Apr 1999 for Cpses,Units 1 & 2
ML20205R5701999-04-14014 April 1999
Rev 6 to ER-ME-067, TU Electric Engineering Rept,Evaluation of Thermo-Lag Fire Barrier Sys
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
ML20205J7831999-04-0101 April 1999
Rev 0 to ERX-99-001, CPSES Unit 2 Cycle 5 Colr
ML20205N3101999-03-31031 March 1999
Monthly Operating Repts for Mar 1999 for Cpses,Units 1 & 2
ML20204H6371999-02-28028 February 1999
Monthly Operating Repts for Feb 1999 for Comanche Peak Units 1 & 2
ML20205N1481999-02-28028 February 1999
Corrected Monthly Operating Rept for Feb 1999 for CPSES, Units 1 & 2
ML20203A4881999-02-0303 February 1999
Safety Evaluation Granting Requests for Relief B-3 - B-6,C-2 & C-3 for Plant,Unit 2
ML20210J9201999-02-0101 February 1999
CPSES 10CFR50.59 Evaluation Summary Rept 0008,for 970802- 990201
ML20202D0101999-01-27027 January 1999
Safety Evaluation Supporting First 10-yr Interval ISI Program Plan Requests for Relief B-9,B-10 & B-11 for CPSES, Unit 1
ML20199E9961998-12-31031 December 1998
Monthly Operating Repts for Dec 1998 for Cpses,Units 1 & 2
ML20207D6091998-12-31031 December 1998
1998 Annual Operating Rept for Cpses,Units 1 & 2. with
ML20197K2371998-11-30030 November 1998
Monthly Operating Repts for Nov 1998 for Cpses,Units 1 & 2
ML20195F3161998-10-31031 October 1998
Monthly Operating Repts for Oct 1998 for Cpses,Units 1 & 2
ML20154M8841998-09-30030 September 1998
Monthly Operating Repts for Sept 1998 for Cpses,Units 1 & 2
ML20154B5741998-09-30030 September 1998
Safety Evaluation Re Licensee Response to GL 96-05, Periodic Verification of Design-Basis Capability of Safety- Related Motor-Operated Valves. Licensee Has Established Acceptable Program
ML20151W0361998-08-31031 August 1998
Monthly Operating Repts for Aug 1998 for Cpses,Units 1 & 2. with
ML20151Q1211998-08-14014 August 1998
Rev 0 to Control of Hazard Barriers
ML20237C4061998-08-14014 August 1998
Safety Evaluation Supporting Request to Implement Risk Informed IST Program
ML20237C6721998-07-31031 July 1998
Monthly Operating Repts for July 1998 for Cpses,Units 1 & 2
ML20236V3121998-07-29029 July 1998
Final Part 21 Rept Re Enterprise DSR-4 & DSRV-4 Edgs.Short Term Instability Was Found During post-installation Testing & Setup as Part of Design mod/post-work Testing Process. Different Methods Were Developed to Correct Problem
ML20236R0711998-06-30030 June 1998
Monthly Operating Repts for June 1998 for Cpses,Units 1 & 2
ML20249B2581998-05-31031 May 1998
Monthly Operating Repts for May 1998 for Cpses,Units 1 & 2
ML20248A1671998-05-22022 May 1998
Interim Part 21 Re Enterprise DSR-4 & DSRV-4 Emergency diesel.Post-installation Testing Revealed,High Em/Rfi Levels Affected New Controllers,Whereas Original Controllers Were unaffected.Follow-up Will Be Provided No Later than 980731
ML20247G3241998-04-30030 April 1998
Monthly Operating Repts for Apr 1998 for Cpses,Units 1 & 2
ML20216B8661998-04-0101 April 1998
Rev 0 to ERX-98-001, CPSES Unit 1 Cycle 7 Colr
ML20216J3061998-03-31031 March 1998
Monthly Operating Repts for Mar 1998 for Cpses,Units 1 & 2
ML20216J1861998-02-28028 February 1998
Monthly Operating Repts for Feb 1998 for Comanche Peak Steam Electric Station
ML20197A6951998-02-24024 February 1998
Inservice Insp Summary Rept,First Interval,Second Period, First Outage
ML20199J5391998-02-0202 February 1998
CPSES Commitment Matl Change Evaluation Rept 0002 for 960202-970801
1999-09-30
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Log # TXX-95149 File # 10200 lllllllll'
L 4 10250
{ ] Ref. # 10CFR50.36(c)(5) 7UELECTRIC May 22, 1995 C. Lance Terry Group Yko Presidret Mr. L. J. Callan U. S. Nuclear Regulatory Conmission Region IV 611 Ryan Plaza Dr., Suite 400 Arlington, TX 76011
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) - UNIT 1 DOCKET NOS. 50-445 METEOROLOGICAL INSTRUMENTATION REPORT SPECIAL REPORT NO. 1-SR-95-002-00
Dear Sir:
Enclosed is a 10 day Special Report titled, " Loss of Delta-T Channels at Meteorological Tower due to a Lightning Strike" submitted in accordance with the CPSES Unit 1 and Unit 2 Offsite Dose Calculation Manual, section 3.3.3.6, METEOROLOGICAL MONITORING INSTRUMENTATION.
Sincerely.
C. L. Terry By: A V D.R. Woodlan Docket Licensing Manager OB/ob Attachment cc: Mr. D. F. Kirsch, Region IV Resident Inspectors, CPSES ,
Dacument Control Desk. NRC i 9505300142 950522 l PDR ADOCK 05000445 i S PDR l P. O. Bos 1002 Glen Rose. Texas 7MW3 / l
Attachment to TXX-95149 Page 1 of 2 TV ELECTRIC COMANCHE PEAK STEAM ELECTRIC STATION SPECIAL REPORT NO. 1 SR 95 002 00 LOSS OF DELTA T CHANNELS AT METEOROLOGICAL TOWER DUE TO LIGHTNING STRIKE 1.0 Report Requirements This special report is submitted in accorc:nce with Comanche Peak Steam Electric Station (CPSES) Unit 1 and Unit 2 Offsite Dose Calculation Manual (00CM) Part-1 page 3/4-13 " Meteorological Monitoring Instrumentation." Section 3.3.3.6 requires that if one or more of the required channels (i .e. . one of three wind directional channels, one of three wind speed channels or one of two atmospheric stability indication channels (Delta-Temperature)) are inoperable for more than 7 days, a Special Report be prepared and submitted to the Nuclear Regulatory Commission, pursuant to CPSES Technical Specification 6.9.2 within the next 10 days outlining the cause of the malfunction and the plans for restoring the channel (s) to OPERABLE status.
2.0 Event Description On May 5. 1995, at 2008 CDT. a Lightning Strike damaged the meteorological instrumentation at the Primary and Backup Meteorological Towers. Data from the Primary and Backup Towers to Control Room was interrupted. On May 12. 1995.
the Backup Tower was restored.
Attempts were made to restore the Primary Tower instrumentation, specifically, the Delta-Temperature (Delta-T) channel (s). However, due to the unavailability of parts (receiver card) the required Delta-T channel could not be restored within the seven days duration.
3.0 Corrective Actions TU Electric has received the receiver cards. The Primary Tower instrumentation Delta-T (channel B) was restored on May 20. 1995, using the replacement card.
Channel-A repairs are in process. The system will be restored and declared OPERABLE as soon as possible. Additionally, a Plant Incident Report (PIR) was issued to evaluate / resolve the lightning protection system at CPSES.
Appropriate ccrrective actions will be taken to minimize recurrence of this problem.
e Attachment to TXX-95149 Page 2 of 2 TV ELECTRIC l COMANCHE PEAK STEAM ELECTRIC STATION SPECIAL REPORT NO.1 SR 95 002 00 (CONTD.)
l LOSS OF DELTA T CHANNELS AT METEOROLOGICAL TOWER DUE TO LIGHTNING STRIKE.
4.0 Evaluation Results The CPSES ODCM requires availability of one wind speed one wind direction and one Delta-T channel for the OPERABILITY of the meteorological instrumentation.
These channels are located on the Primary Tower.
The Backup Tower provides wind speed, wind direction, ambient temperature and sigma theta (an indication for atmospheric stability in the horizontal plane).
Although the 00CM does not take credit for Sigma Theta, analysis has indicated that meteorological data from the Backup Tower can be reliably substituted during loss-of-data periods form the Primary Tower. Additionally, the National Weather Service is another source of information for CPSES to obtain the required information needed to calculate / assess offsite dose calculation.
based on the above, this event did not impact the safety or health of the public or safe operatior, of CPSES.
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