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Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO
MONTHYEARML20028H2781990-11-13013 November 1990 Special Rept:On 901029,condenser Evacuation Sys Noble Gas Monitor Inoperable for More than 72 H.Monitor Will Return to Svc by 901119,following Completion of Satisfactory Channel Calibr ML20042E1251990-04-0404 April 1990 Special Rept:On 900325,meteorologic Tower Declared Inoperable for More than 7 Days.Caused by Failure of Primary Delta Temp Channel ML20012D9201990-03-20020 March 1990 Special Rept:On 900312,planned Maint Outage of 1E Bs Bus Initiated to Complete 5-yr Bus Cleaning Surveillance, Rendering All Fire Dectection Sys Alarms & Sprinkler Sys Inoperable.Containment Air Temps Monitored Hourly ML20011E3211990-02-0101 February 1990 Special Rept:On 891227,pressurizer Base Support Strong Motion Accelerometer 2XT-8020D Declared Inoperable for More than 30 Days Due to Playback Readings Outside Test Acceptance Criteria.Repairs Planned During Next Outage ML20005D6971989-12-11011 December 1989 Special Rept:On 891127,wide Range Gas Monitor Removed from Svc for Performance of 18-month Channel Calibr Surveillance. Monitor Will Be Returned to Svc by 891216 Following Completion of Satisfactory Channel Calibr ML19332F1791989-11-30030 November 1989 Ro:Air Ejector Exhaust Treatment Sys Inoperable for More than 31 Days.Sys Declared Inoperable.Failure to Implement Reporting Requirement Attributed to Inadequate Guidance in Interpretation of Intent & Requirement of Tech Spec ML19325E2921989-10-18018 October 1989 Followup Ro:In Sept 1989,identified Fire Doors Found Inoperable During Routine Surveillances Consisting of 17 Latching Mechanism Failures & 8 Closure Mechanism Failures. No Doors Found to Be Blocked Open ML20024D5041983-07-19019 July 1983 RO 83-067:on 830718,review of Fire Protection Surveillance Program Revealed That Fire Detectors Failed Routine Surveillance Testing & Were Not Declared Inoperable.Fire Watches Not Posted ML20024C7771983-06-29029 June 1983 RO:C-E Has Advised Util That RCS Hot Leg Sampling Line Nozzle Loads Exceed Stress Limits.Acceptability of ASME Requirements Being evaluated.Fourteen-day Rept Will Be Submitted by 830712 ML20052H6901982-05-0606 May 1982 Ro:Submits Corrections to Equipment Tag Number Errors in LER 82-007 on 820407 ML20052E2201982-04-28028 April 1982 RO 82-011:on 820427,both Channels on Control Room Airborne Radiation Monitor Found Inoperable.Caused by Failure to Maintain Emergency Mode for Air Cleanup Sys During 820313 Preventive Maint ML20050M3871982-04-0101 April 1982 RO Re Deficiency in Establishment of Sufficient Fire Watches,Per Tech Spec Section 3.7.9,App a Limiting Conditions for Operation.Continuous Fire Watches Established.Impact Evaluation Will Be Submitted in 14 Days ML20050B7031982-03-26026 March 1982 Ro:On 820324,w/reactor in Mode 5,unplanned Dilution Occurred While Filling RCS Water Storage Tank from Refueling Water Storage Tank ML20050A0001982-03-15015 March 1982 Ro:On 820314,low Pressure Safety Injection Pump Lost Due to Air in Pump.Pumps Vented & Shutdown Cooling Restored. Investigation in Progress.Results Will Be Forwarded w/14-day Rept & Two LERs 1990-04-04
[Table view] Category:LER)
MONTHYEARML20028H2781990-11-13013 November 1990 Special Rept:On 901029,condenser Evacuation Sys Noble Gas Monitor Inoperable for More than 72 H.Monitor Will Return to Svc by 901119,following Completion of Satisfactory Channel Calibr ML20042E1251990-04-0404 April 1990 Special Rept:On 900325,meteorologic Tower Declared Inoperable for More than 7 Days.Caused by Failure of Primary Delta Temp Channel ML20012D9201990-03-20020 March 1990 Special Rept:On 900312,planned Maint Outage of 1E Bs Bus Initiated to Complete 5-yr Bus Cleaning Surveillance, Rendering All Fire Dectection Sys Alarms & Sprinkler Sys Inoperable.Containment Air Temps Monitored Hourly ML20011E3211990-02-0101 February 1990 Special Rept:On 891227,pressurizer Base Support Strong Motion Accelerometer 2XT-8020D Declared Inoperable for More than 30 Days Due to Playback Readings Outside Test Acceptance Criteria.Repairs Planned During Next Outage ML20005D6971989-12-11011 December 1989 Special Rept:On 891127,wide Range Gas Monitor Removed from Svc for Performance of 18-month Channel Calibr Surveillance. Monitor Will Be Returned to Svc by 891216 Following Completion of Satisfactory Channel Calibr ML19332F1791989-11-30030 November 1989 Ro:Air Ejector Exhaust Treatment Sys Inoperable for More than 31 Days.Sys Declared Inoperable.Failure to Implement Reporting Requirement Attributed to Inadequate Guidance in Interpretation of Intent & Requirement of Tech Spec ML19325E2921989-10-18018 October 1989 Followup Ro:In Sept 1989,identified Fire Doors Found Inoperable During Routine Surveillances Consisting of 17 Latching Mechanism Failures & 8 Closure Mechanism Failures. No Doors Found to Be Blocked Open ML20024D5041983-07-19019 July 1983 RO 83-067:on 830718,review of Fire Protection Surveillance Program Revealed That Fire Detectors Failed Routine Surveillance Testing & Were Not Declared Inoperable.Fire Watches Not Posted ML20024C7771983-06-29029 June 1983 RO:C-E Has Advised Util That RCS Hot Leg Sampling Line Nozzle Loads Exceed Stress Limits.Acceptability of ASME Requirements Being evaluated.Fourteen-day Rept Will Be Submitted by 830712 ML20052H6901982-05-0606 May 1982 Ro:Submits Corrections to Equipment Tag Number Errors in LER 82-007 on 820407 ML20052E2201982-04-28028 April 1982 RO 82-011:on 820427,both Channels on Control Room Airborne Radiation Monitor Found Inoperable.Caused by Failure to Maintain Emergency Mode for Air Cleanup Sys During 820313 Preventive Maint ML20050M3871982-04-0101 April 1982 RO Re Deficiency in Establishment of Sufficient Fire Watches,Per Tech Spec Section 3.7.9,App a Limiting Conditions for Operation.Continuous Fire Watches Established.Impact Evaluation Will Be Submitted in 14 Days ML20050B7031982-03-26026 March 1982 Ro:On 820324,w/reactor in Mode 5,unplanned Dilution Occurred While Filling RCS Water Storage Tank from Refueling Water Storage Tank ML20050A0001982-03-15015 March 1982 Ro:On 820314,low Pressure Safety Injection Pump Lost Due to Air in Pump.Pumps Vented & Shutdown Cooling Restored. Investigation in Progress.Results Will Be Forwarded w/14-day Rept & Two LERs 1990-04-04
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARML20217E3381999-09-30030 September 1999 Monthly Operating Repts for Sept 1999 for Songs,Units 2 & 3 ML20212A1471999-09-13013 September 1999 Special Rept:On 990904,condenser Monitor Was Declared Inoperable.Difficulties Encountered During Component Replacement Precluded SCE from Restoring Monitor to Service within 72 H.Alternate Method of Monitoring Was Established ML20211N0511999-09-0303 September 1999 SER Approving Exemption from Certain Requirements of 10CFR50.44 & 10CFR50 App A,General Design Criterion 41 to Remove Requirements from Hydrogen Control Systems from SONGS Units 2 & 3 Design Basis ML20211Q8201999-08-31031 August 1999 Monthly Operating Repts for Aug 1999 for Songs,Units 2 & 3. with ML20211H8621999-08-23023 August 1999 Safety Evaluation Accepting Licensee Requests for Relief RR-E-2-03 - RR-E-2-08 from Exam Requirements of Applicable ASME Code,Section Xi,For First Containment ISI Interval ML20210P4791999-08-11011 August 1999 COLR Cycle 10 Songs,Unit 3 ML20210P4731999-08-11011 August 1999 COLR Cycle 10 Songs,Unit 2 ML20210Q6521999-07-31031 July 1999 Monthly Operating Repts for July 1999 for Songs,Units 2 & 3 ML20210L2771999-07-30030 July 1999 SONGS Unit 3 ISI Summary Rept 2nd Interval,2nd Period Cycle 10 Refueling Outage U3C10 Site Technical Services ML20209C9281999-06-30030 June 1999 Monthly Operating Repts for June 1999 for Songs,Units 2 & 3. with ML20195D3061999-06-0202 June 1999 Safety Evaluation of TR SCE-9801-P, Reload Analysis Methodology for San Onofre Nuclear Generating Station,Units 2 & 3. Rept Acceptable ML20195H5491999-05-31031 May 1999 Monthly Operating Rept for May 1999 for Songs,Units 2 & 3 ML20196L3221999-05-11011 May 1999 SONGS Unit 2 ISI Summary Rept 2nd Interval,2nd Period Cycle-10 Refueling Outage ML20206H2611999-05-0505 May 1999 Part 21 Rept Re Defect Found in Potter & Brumfield Relays. Sixteen Relays Supplied in Lot 913501 by Vendor as Commercial Grade Items.Caused by Insufficient Contact Pad Welding.Relays Replaced with New Relays ML20206S7281999-04-30030 April 1999 Monthly Operating Repts for Apr 1999 for Songs,Units 2 & 3 ML20205Q6221999-04-19019 April 1999 Safety Evaluation Authorizing Proposed Alternative to Use Wire Penetrameters for ISI Radiography in Place of ASME Code Requirement ML20205R0371999-04-16016 April 1999 SER Approving Proposed Deviation from Approved Fire Protection Program Incorporating Technical Requirements of 10CFR50,App R,Section III.0 That Applies to RCP Oil Fill Piping ML20205G2611999-04-0101 April 1999 Special Rept:On 990328,3RT-7865 Was Removed from Service. Monitor Is Scheduled to Be Returned to Service Prior to Mode 4 Entry (Early May 1999) Which Will Exceed 72 H Allowed by LCS 3.3.102.Alternate Method of Monitoring Will Be Used ML20205Q0981999-03-31031 March 1999 Monthly Operating Repts for Mar 1999 for Songs,Units 2 & 3 ML20204F8101999-02-28028 February 1999 Monthly Operating Repts for Songs,Units 2 & 3.With ML20203J1981999-02-12012 February 1999 Safety Evaluation Supporting Amends 149 & 141 to Licenses NPF-10 & NPF-15,respectively ML20202F7041999-01-21021 January 1999 Special Rept:On 990106,SCE Began to Modify 2RT-7865.2RT-7865 to Allow Monitor to Provide Input to New Radiation Monitoring Data Acquisition Sys.Monitor Found to Exceeds 72 H Allowed Bt LCS 3.3.102.Alternate Monitoring Established ML20199F0771998-12-31031 December 1998 Monthly Operating Repts for Dec 1998 for Songs,Units 2 & 3 ML20206H2101998-12-31031 December 1998 SCE 1998 Annual Rept ML20198A6731998-12-11011 December 1998 Special Rept:On 981124,meteorological Sys Wind Direction Sensor Was Observed to Be Inoperable.Caused by Loss of Communication from Tower to Cr.Sensor Was Replaced & Sys Was Declared Operable on 981204 ML20196D8901998-11-30030 November 1998 Non-proprietary Reload Analysis Methodology for Songs,Units 2 & 3 ML20198C3471998-11-30030 November 1998 Monthly Operating Repts for Nov 1998 for Songs,Units 2 & 3 ML20195H2471998-10-31031 October 1998 Monthly Operating Repts for Oct 1998 for Songs,Units 2 & 3 ML20154B7211998-10-0101 October 1998 Safety Evaluation Approving Licensee Request to Implement Alternatives Contained in Code Case N-546 for Current Interval at Songs,Units 2 & 3 Until Code Case Approved by Ref in Reg Guide 1.147 ML20154M7921998-09-30030 September 1998 Monthly Operating Repts for Sept 1998 for Songs,Units 2 & 3 ML20155F6081998-09-17017 September 1998 Non-proprietary Version of San Onofre 2 & 3 Replacement LP Rotors ML20151Z9851998-08-31031 August 1998 Monthly Operating Repts for Aug 1998 for Songs,Units 2 & 3 ML20151Q1211998-08-14014 August 1998 Rev 0 to Control of Hazard Barriers ML18066A2771998-08-13013 August 1998 Part 21 Rept Re Deficiency in CE Current Screening Methodology for Determining Limiting Fuel Assembly for Detailed PWR thermal-hydraulic Sa.Evaluations Were Performed for Affected Plants to Determine Effect of Deficiency ML20198G4491998-07-31031 July 1998 Rev 1 to WCAP-15015, Specific Application of Laser Welded Sleeves for SCE San Onofre Units 2 & 3 Sgs ML20237B8571998-07-31031 July 1998 Monthly Operating Repts for July 1998 for Songs,Units 2 & 3 ML20236N3871998-07-0909 July 1998 Part 21 Rept Re Deficiency Identified in Event 32725, Corrected by Mgp Instruments Inc.Licensee Verified,Affected Equipment Has Been Reworked & Tested at Sce.Design Mod Completed ML20236R1031998-06-30030 June 1998 Monthly Operating Repts for June 1998 for Songs,Units 2 & 3 ML20249A9431998-05-31031 May 1998 Monthly Operating Repts for May 1998 for Songs,Units 2 & 3 ML20248B8981998-05-26026 May 1998 Updated SG Run Time Analysis Cycle 9 ML20248B9221998-04-30030 April 1998 Rev 0 to AES 98033327-1-1, Updated Probabilistic Operational Assessment for SONGS Unit 2,Second Mid Cycle Operating Period,Cycle 9 ML20247L5181998-04-30030 April 1998 Monthly Operating Repts for Apr 1998 for Songs,Units 2 & 3 05000361/LER-1998-003, LOCA Evaluation of Safety Significance of Failure of Emergency Sump Valve Linestarter (LER 1998-003)1998-04-0606 April 1998 LOCA Evaluation of Safety Significance of Failure of Emergency Sump Valve Linestarter (LER 1998-003) ML20217Q6161998-04-0505 April 1998 Failure Analysis Rept 98-005,Failure Analysis of 2HV9305 Motor Starter ML20217A0141998-03-31031 March 1998 Monthly Operating Repts for Mar 1998 for Songs,Units 2 & 3 ML20217D4701998-03-0202 March 1998 Rev 1 to 90459, Failure Modes & Effects Analysis DG Cross- Tie,DCP7048.00SE ML20216J3551998-02-28028 February 1998 Monthly Operating Repts for Feb 1998 for Songs,Units 2 & 3 ML20203E7301998-02-17017 February 1998 SER Accepting 980105 Request to Use Mechanical Nozzle Seal Assembly as Alternate Repair Method,Per 10CFR50.55a(a)(3)(1) for Plant,Units 2 & 3 ML20203K9141998-02-0303 February 1998 Rev 0 to ESFAS Radiation Monitor Single Failure Analysis. W/96 Foldout Drawings ML20202F9731998-01-31031 January 1998 Monthly Operating Repts for Jan 1998 for Songs,Units 2 & 3 1999-09-30
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Southern California Edison Company
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$7 A f TON M AN AGE R (714) 492 7 F00 June 10 1982 U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 - 5368 Attention: Mr. R. H. Engelken, Regional Administrator
Dear Sir:
Subject:
Docket No. 50-361 Licensee Event Report No. 82-21 San Onofre Nuclear Generating Station, Unit 2 In accordance with Technical Specification 6.9.1.12.1, this letter confirms our prompt notification of your office by telephone on June 9, 1982, of a reportable occurrence involving the Auxiliary Feedwater (APd) System.
E i i i Review of Non-Conformance Report (NCR) S023-P-230; issued by SCE/QA, identified a construction error in that the override relay contacts associated wit.h the APd pump-motor were installed normally open, based on an incorrect -
wiring diagram. The elementary diagram correctly shows these contacts to be ,
normally closed. This error has now been corrected. .
An evaluation is in progress to determine the potential consequences of this error had it not been corrected. Preliminary results indicate that had the APd pumps- been operating (plant cool dowl) and a loss of off-site power occurred followed by an Engineered Safety Features Actuation Signal (ESFAS), i the Diesel Generators would attempt to start with the APd pump-motors connected to the 4160v emergency buses. This would have caused an under voltage situation in both the 4160v buses and the associated 480v buses. The voltage dip on the 4160v buses would have been acceptable, hoaever, the voltage dip on the 480v buses would have been either marginal or below the design basis.
This preliminary evaluation led to the conclusion that the performance of the Emergency Power System required a corrective measure to prevent its operation in a manner less conservative than that assumed in the safety ZOA analysis. Therefore, prompt notification to your office was made.
8206210340 820610 PDR ADOCK 05000361 S PDR
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Mr. R. H. Engelken June 10, 1982 This was an isolated case of construction error and since the error has been rectified, no additional corrective measures are required.
A completed LER form addressing this event will be provided by June 23, 1982. If there are any questions regarding the above, please contact me.
Sincerely,
[. k cc: A. E. Chaffee (USNRC Resident Inspector, San Onofre, Unit 2)