ML13311A417
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Letter Sequence Other | |
|---|---|
TAC:65149, (Approved, Closed) | |
Results Other: 05000206/LER-1980-031, Forwards LER 80-031/03L-0, 05000206/LER-1980-031-03, /03L-0:on 800728,during Routine Equipment Rotation,South Saltwater Cooling Pump Discharge Valve Failed to Open Automatically.Caused by Installation of Solenoid Valve Operator W/Wrong Size Spring.Valve Replaced, 05000206/LER-1980-032, Forwards LER 80-032/03L-0, 05000206/LER-1980-032-03, /03L-0:on 800717,during Cold Shutdown Conditions, Isolation Valve for Svc Water to Containment Failed to Close Upon Demand.Caused by Small Amount of Desiccant Which Entered Solenoid During Removal of Air Dryer Desiccant, 05000206/LER-1981-018, Forwards LER 81-018/01T-0.Detailed Event Analysis Submitted, 05000206/LER-1981-018-01, /01T-0:on 810717,hydrogen-air Mixture Ignited in North Radwaste Gas Decay Tank Resulting in Manway Damage & Gaseous Release.Caused by check-valve Back Leakage of Volatile Gas Mix at Dinitrogen Instrument Air Interface, 05000206/LER-1982-007, Forwards LER 82-007/03L-0.Detailed Event Analysis Submitted, 05000206/LER-1982-007-03, /03L-0:on 820208,south Saltwater Cooling Pump (G13B) Declared Inoperable.Caused by Random Failure of Discharge Pressure switch,PS-39.Pressure Switch Replaced, ML13310A232, ML13310B052, ML13311A417, ML13317B073, ML13317B074, ML13322A850, ML13323A784, ML13323A889, ML13330A058, ML13330A076, ML13330B182, ML13330B400, ML13333A925, ML13333B765, ML13333B984, ML13333B987, ML20004F191, ML20079R245 | |
MONTHYEARML13316B7251980-04-0404 April 1980
[Table View]Discusses Licensee Actions Re 800310 Failure of Saltwater Cooling Sys.Auxiliary Salt Water Cooling Pump Will Not Be Considered in Determining Operability of Sys.Requests Review of All Emergency Procedures & Revision Prior to Operation Project stage: Approval ML13330A0581980-04-16016 April 1980 Notice of Violation from Insp on 800301-0404 Project stage: Other ML13323A7841980-05-13013 May 1980 Responds to NRC Re Violations Noted in IE Insp Rept 50-206/80-09.Corrective Actions:Emergency Operating Instruction S-3-5.34 Revised & Training for Operators Conducted Project stage: Other IR 05000206/19800151980-06-20020 June 1980 IE Insp Rept 50-206/80-15 on 800528-30.No Noncompliance Noted.Major Areas Inspected:Insp Activities Per IE Bulletin 79-13 Re Cracking in Feedwater Sys Piping Project stage: Request ML13330A0761980-06-20020 June 1980 Requests Addl Info Re Failure of Saltwater Cooling Sys on 800310.Info About Events Where Multiple Equipment Failures Occur & Contributing Factors Would Be Beneficial Project stage: Other ML13322A8501980-07-24024 July 1980 Submits Responses to Items 1,2 & 3 of NRC Re Failure of Saltwater Cooling Sys.Response to Item 4 Will Be Submitted by 800804 Project stage: Other ML13330A0771980-08-0808 August 1980 Responds to NRC 800620 Request for Info Re Failure of Salt Water Cooling Sys.Provides Analysis of Loss of Salt Water Cooling Sys Effect on Design Basis LOCA & Main Steam Line Break Inside Containment Project stage: Request 05000206/LER-1980-032, Forwards LER 80-032/03L-01980-08-18018 August 1980 Forwards LER 80-032/03L-0 Project stage: Other 05000206/LER-1980-032-03, /03L-0:on 800717,during Cold Shutdown Conditions, Isolation Valve for Svc Water to Containment Failed to Close Upon Demand.Caused by Small Amount of Desiccant Which Entered Solenoid During Removal of Air Dryer Desiccant1980-08-18018 August 1980 /03L-0:on 800717,during Cold Shutdown Conditions, Isolation Valve for Svc Water to Containment Failed to Close Upon Demand.Caused by Small Amount of Desiccant Which Entered Solenoid During Removal of Air Dryer Desiccant Project stage: Other 05000206/LER-1980-031-03, /03L-0:on 800728,during Routine Equipment Rotation,South Saltwater Cooling Pump Discharge Valve Failed to Open Automatically.Caused by Installation of Solenoid Valve Operator W/Wrong Size Spring.Valve Replaced1980-08-19019 August 1980 /03L-0:on 800728,during Routine Equipment Rotation,South Saltwater Cooling Pump Discharge Valve Failed to Open Automatically.Caused by Installation of Solenoid Valve Operator W/Wrong Size Spring.Valve Replaced Project stage: Other 05000206/LER-1980-031, Forwards LER 80-031/03L-01980-08-21021 August 1980 Forwards LER 80-031/03L-0 Project stage: Other ML13330A1201980-09-24024 September 1980 Ack Receipt of 800829 Request for Addl Info Re Failure of Salt Water Cooling Sys.Input from Several Engineers & Operating Entities Required to Complete Request.Response Will Be Submitted 801008 Project stage: Request ML13302A8381980-10-0808 October 1980 Notification of 801020 Meeting W/Util,Orange County,San Diego County & State of CA OES in El Segundo,Ca to Discuss Completion Dates & Review Matters for State & Local Emergency Plans for Facility & Vicinity Project stage: Request ML13330B0811980-10-28028 October 1980 Notification of 801030 Meeting W/Util in Bethesda,Md to Discuss Loss of Saltwater Cooling Event & Procedures in Place for Loss of Saltwater Cooling & Dessicate in Air Sys Project stage: Meeting ML13330B1031980-12-0808 December 1980 Notification of 801218 Meeting W/Util in Bethesda,Md to Discuss Util Comments Re NRC Case Study of Loss of Salt Water Cooling Sys Project stage: Meeting ML13323A8891980-12-26026 December 1980 Provides Justification for Util Corrective Actions Re Notice of Violation from 800310 Loss of Saltwater Cooling Incident. Proposed Hot Shutdown Time Limit Is Consistent W/Emergency Operating Instruction SO1-3-5.34 Project stage: Other ML13331A0361981-01-0606 January 1981 Summary of 801030 Meeting W/Util in Bethesda,Md Re Loss of Saltwater Cooling Event at Facility & Effects of Desiccant in Compressed Air Sys.W/List of Attendees Project stage: Meeting ML13330A1771981-01-12012 January 1981 Submits Comments on NRC Draft Rept on 800310 Loss of Saltwater Cooling.Forwards Addl Info Requested in 801223 Meeting & Interpretation of Tech Specs Re Saltwater Cooling Sys.Encls Available in Central Files Only ML13333A9251981-02-23023 February 1981 Provides Status Rept on Corrective Actions Taken to Ensure Continued Operability of safety-related air-using Equipment. Blowdown of Header Performed to Remove Dessicant.Preventive Maint Program Is Under Development Project stage: Other ML20004F1911981-06-0404 June 1981 Responds to IE Bulletin 81-03, Flow Blockage of Cooling Water to Safety Sys Components by Corbicula Sp (Asiatic Clam) & Mytilus Sp (Mussel). Periodic Insp & Daily Checks of Heat Exchangers Assure Proper Flow Project stage: Other 05000206/LER-1981-018-01, /01T-0:on 810717,hydrogen-air Mixture Ignited in North Radwaste Gas Decay Tank Resulting in Manway Damage & Gaseous Release.Caused by check-valve Back Leakage of Volatile Gas Mix at Dinitrogen Instrument Air Interface1981-07-31031 July 1981 /01T-0:on 810717,hydrogen-air Mixture Ignited in North Radwaste Gas Decay Tank Resulting in Manway Damage & Gaseous Release.Caused by check-valve Back Leakage of Volatile Gas Mix at Dinitrogen Instrument Air Interface Project stage: Other 05000206/LER-1981-018, Forwards LER 81-018/01T-0.Detailed Event Analysis Submitted1981-07-31031 July 1981 Forwards LER 81-018/01T-0.Detailed Event Analysis Submitted Project stage: Other ML13317A7181981-11-0202 November 1981 Forwards Draft Assessment for SEP Topic IX-3 Re Station Svc & Cooling Water Sys Project stage: Draft Other ML13310A2321982-02-28028 February 1982 Preliminary Rept, Loss of Salt Water Cooling Event on 800310 Project stage: Other ML13317B0741982-03-0404 March 1982 Forwards Preliminary Rept Re Loss of Salt Water Cooling Event of 800310 for Comment on Accuracy & Completeness of Technical Details Project stage: Other ML13317B0191982-03-0404 March 1982 Forwards Page 5,inadvertently Omitted from 820224 Submittal, Re Environ Qualification of Electrical Equipment Project stage: Request 05000206/LER-1982-007, Forwards LER 82-007/03L-0.Detailed Event Analysis Submitted1982-03-0505 March 1982 Forwards LER 82-007/03L-0.Detailed Event Analysis Submitted Project stage: Other 05000206/LER-1982-007-03, /03L-0:on 820208,south Saltwater Cooling Pump (G13B) Declared Inoperable.Caused by Random Failure of Discharge Pressure switch,PS-39.Pressure Switch Replaced1982-03-0505 March 1982 /03L-0:on 820208,south Saltwater Cooling Pump (G13B) Declared Inoperable.Caused by Random Failure of Discharge Pressure switch,PS-39.Pressure Switch Replaced Project stage: Other ML13317B0731982-04-0707 April 1982 Forwards Comments on San Onofre Unit 1 Loss of Salt Water Cooling Event of 800310, Per 820403 Request Project stage: Other ML13333B7651982-08-12012 August 1982 Forwards Case Study Rept Containing Detailed Description, Findings,Conclusions & Recommendations Re 800310 Loss of Salt Water Cooling Event Project stage: Other ML20079R2451983-06-18018 June 1983 Comments on H Dieckamp 830527 & 0610 Ltrs Re Immediate Effectiveness of Restart.Dieckamp Concealment of Info Detrimental to Mgt Evidences Util Policy of Expediency. Certificate of Svc Encl Project stage: Other ML13310B0551983-10-28028 October 1983 Safety Evaluation Concluding That Proposed Change 98 Re Auxiliary Salt Water Cooling Pump Unacceptable.Deficiencies Identified.Alternatives Presented Project stage: Approval ML13310B0521983-10-28028 October 1983 Advises That 800827 Proposed Change 98 Re Auxiliary Salt Water Cooling Pump,Unacceptable.Revised Proposed Tech Spec Change Addressing Both Auxiliary Salt Water & Screen Wash Pumps as Backup Sources of Cooling Requested Project stage: Other ML13333B9871983-10-31031 October 1983 Degradation of Salt Water Cooling Sys Caused by Loss of Instrument Air, Technical Review Rept Project stage: Other ML13333B9841983-10-31031 October 1983 Forwards Degradation of Salt Water Cooling Sys Caused by Loss of Instrument Air, Technical Review Rept Project stage: Other ML13330B1821987-04-0101 April 1987 Forwards Erin Engineering & Research,Inc Rept, Reliability Assessment of San Onofre Unit 1 Saltwater Cooling Sys, Per NUREG-0829.Study Concludes That Sys as Designed Provides Very Reliable Means of Removing Decay Heat Project stage: Other ML13311A4171987-04-30030 April 1987 Reliability Assessment of San Onofre Unit 1 Saltwater Cooling Sys Project stage: Other ML13331B0021987-11-24024 November 1987 Forwards Request for Addl Info Re Plant Salt Water Cooling Sys Reliability Study Project stage: RAI ML13333A6031987-12-0202 December 1987 Forwards Safety Evaluation Accepting Util 871016 Single Failures Analysis for Esf,Per 871009 Meeting.Justification for Interim Plant Operation Acceptable Until 871214,pending Further Analysis Project stage: Approval ML13311A7291988-07-22022 July 1988 Forwards Responses to 871124 Request for Addl Info Re Salt Water Cooling Sys Reliability Study.Initiating Events Affecting Saltwater Cooling Sys or Vital Support Sys Can Affect Overall Sys Reliability Project stage: Request ML13330B4001988-10-0303 October 1988 Agrees W/Licensee That No Actions Required to Improve Reliability of Salt Water Cooling Sys Per SEP Topic IX-3, Item 4.32.7.If Complete Loss of Salt Water Cooling Occurs, Backup Pumps Can Provide Interim Cooling Project stage: Other 1981-11-02 |
| ML13311A417 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/30/1987 |
| From: | ERIN ENGINEERING & RESEARCH, INC. |
| To: | |
| Shared Package | |
| ML13311A418 | List: |
| References | |
| TAC-65149, NUDOCS 8704060536 | |
| Download: ML13311A417 (174) | |
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