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	Issue date	Title	Topic
ML19317G327	9 May 1977	RO-77-37:on 770416,emergency Feedwater Pump Tripped on Overspeed When Using Main Steam Power.Caused by New Governor'S Overly Slow Response.Feedwater Pump Left Lined Up on Auxiliary Steam & Engineering Dept Evaluated Governor	Overspeed trip
ML19317G337	9 May 1977	RO-77-36:on 770415,chemical Addition Valve CAV-2 & Makeup Valve MUV-258 Failed to Close During Performance of SP-370. Caused by Weak Closure Spring & Corroded & Dirty Contacts. Contacts Cleaned & Spring to Be Renewed
ML19317G345	28 April 1977	RO 77-35E:on 770405-06,fish Impingement on Intake Screens Exceeded Tech Specs Limits.Caused by Barge Traffic & Strong Northwest Winds
ML19319C988	26 July 1977	RO 77-74E:on 770719,unmonitored Reactor Bldg Purge Caused Radioactive Release Exceeding ETS & STS Limits.Caused by Procedural Inadequacy.Operational Procedure OP-147 Revised, Ensuring Radiation Monitor Rm-A1 Operability
ML19319D008	25 July 1977	RO 77-73E:on 770716,unplanned Radioactive Gas Released to Auxiliary Bldg During Makeup Tank Venting.Cause Undetermined & Being Investigated.Venting Ceased & Bldg Evacuated.Supply Air re-established & Ventilation Resumed When Alarm Cleared
ML19319D018	30 June 1977	RO-77-72:on 770630,gas Chromatograph Found Calibr Using Wrong Calibr Gases.Caused by Calibr Technician Failure to Follow Surveillance Procedure for Hydrogen Gas Analyzer SP-730.Chromatograph Calibr & Restored to Svc
ML19319D151	24 January 1977	RO 77-4:on 770101,during Cycling Demonstration of Normally Untestable valves,DHV-42 Control Switch Opened,Permitting Flow Path from RCS to Reactor Bldg Sump.Caused by Operator Negligence.Valve Closed & Caution Note Added to Procedure
ML19319D366	16 April 1977	Confirms 770416 Notification Informing IE That Steam Driven Emergency Feedwater Pump Failed to Start on Main Feedwater Pump Loss.Primary Cooldown Rate Experienced in Excess of Tech Spec Requirements
ML19322A371	18 September 1979	RO 79-097-01P:on 790918,reactor Power Exceeded Power Level Cutoff Limit of 92%.Nuclear Instrumentation Calibr & Reactor Power Reduced.Detailed Rept Will Follow within 14 Days
ML19322A518	19 October 1979	Ro:On 790708,sodium Hydroxide Tank Levels Not Reported Due to Misinterpretation of Reporting Requirements.Detailed Rept Will Follow within 14 Days
ML19326A778	20 November 1975	RO-75-01:on 751108,fuel Assembly 3A33 Fell 5 Ft During Transfer from Shipping Container to Insp Station.Caused by Sling Wire Pulling Out of Swaged Fitting.New Fuel Handling Tool W/O Slings Used Pending Completion of Sling Evaluation
ML19329D700	20 June 1977	RO 77-52:on 770614,B&W Evaluation of RO 77-17 Indicated Possible Unreviewed Safety Question Re Moderator Dilution. Possibly Caused by Unterminated Injection of Sodium Hydroxide Tank Contents Into RCS Causing Core Criticality
ML19337B555	26 September 1980	Special Rept 80-1:on 800915,during Mode 1 Power Operation, Meteorological Monitoring Instrumentation Channels Were Not Restored to Operability for More than 7 Days.Caused by Const Effort Which Required Relocation of Cables
ML19338G059	16 October 1980	Special Rept 80-2:on 800923,discovered That Fire Protection, Deluge & Sprinkler Sys Test Was Not Completed in Required Surveillance Interval.Caused by Misinterpretation.Employee Appointed to Track & Schedule Required Surveillances
ML19340A354	13 July 1977	RO-77-70E:on 770331 & 0429,monthly Seawater Samples Not Collected as Required by ETS 3.2.2.Caused by Univ of Fl Failure to Collect All Samples.Complete Sample Collection Importance Stressed to Univ
ML19340A404	18 August 1977	RO 77-95E:on 770728-29,impingement Sampling of Fish Discontinued Due to Excessive Seagrass Load.Caused by Large Influx of Seagrass & Algae That Clogged Intake Screens & Resulted in Removal of Collection Baskets
ML19340A406	7 June 1977	Ro:On 770606,unplanned Radioactive Gas Release Occurred, Venting Makeup Tank to Low Pressure Header in Progress.Max Instantaneous Release Rate at Profile Discharge peak6.4% of Most Restrictive Tech Spec Limit.Cause Under Investigation
ML19340A408	27 June 1977	Ro:On 770626,unplanned Radioactive Gas Release Occurred, Venting Makeup Tank to Low Pressure Header in Progress.Max Instantaneous Release Rate at Profile Discharge Peak 8% of St Restrictive Tech Spec Limit.Cause Under Investigation
ML19340A412	18 July 1977	Ro:On 770716,unplanned Radioactive Gas Release Occurred, Venting Makeup Tank to Low Pressure Header in Progress.Max Instantaneous Release Rate at Profile Discharge Peak 0.0063% of Most Restrictive Tech Spec.Cause Under Investigation
ML19340A415	20 July 1977	Ro:On 770719,unmonitored Radioactive Release of 0.739 Ci Noble Gas Occurred at Rate of 559.5 Uci/Second for 22 Minutes.Reactor Bldg Pugge Discontinued Upon Discovery of Inoperative Radiation Monitor RMA1.Detailed Rept to Follow
ML19340A422	23 September 1977	RO 77-117E:on 770909-10,fish Impingement on Intake Screens Exceeded Tech Specs Limit.Possibly Caused by Oil Barge Leaving Intake Canal During Survey
ML19340A429	21 September 1977	RO 77-110E:from Jan-May 1977,milk Samples Not Collected or Analyzed from Sample Station C-47.Caused by Assumption That Milk Need Not Be Collected from C-47 Because Milk Was Unavailable at Critical Sample Station C-49 for Comparison
ML19340A436	21 September 1977	RO 77-111E:on 770101-0731,environ Samples Not Analyzed Using Procedures That Provided LLDs Equal to or Less than Tech Specs Criteria.Caused by Inadequate Techniques,Procedures & Equipment to Achieve Required LLDs
ML19340A445	15 September 1977	RO 77-108E:on 770830-31,fish Impingement on Intake Screens Exceeded Tech Specs Limit.No Cause Given
ML19340A446	26 September 1977	RO 77-116E:on 770918,unmonitored Radioactive Release to Atmosphere Occurred.Caused by Reactor Bldg Purge Monitor RM-A1 Vacuum Pump & Monitor Alarm Indicator in Control Center Being Inoperable During 2-h & 51 Minute Purge
ML19340A452	15 September 1977	RO 77-107E:on 770907,unplanned Radioactive Gas Release to Turbine Bldg Occurred for 12-h & 40 Minutes.Caused by Gas from Makeup Tank Leaking by Valves MUV-142 & MUV-143 to Bldg Via Vent Valve HYV-25 During Maint on Hydrogen Supply Sys
ML19340A459	9 September 1977	RO 77-103E:on 770903,unplanned Radioactive Gas Release to Auxiliary Bldg Occurred.Caused by Concentrated Waste Storage Tanks Loop Seals Being Blown.Loop Seals re-established & Sys Mods Initiated to Prevent Future Occurrences	Loop seal
ML19340A464	18 August 1977	RO 77-96E:on 770801-02,fish Impingement on Intake Screens Exceeded Tech Specs Limit.Probably Caused by Coal & Oil Barges & Maint Dredge Entering & Exiting Intake Canal During Sampling Period
ML19340C134	30 October 1980	RO 80-057-01P:on 801029 Reactor Bldg Exhaust Monitor RM-A1 Discovered Operating in Degraded Mode Due to Improper Detector Installation & Valve Lineup.Detailed Rept Follows within 14 Days
ML19340E980	12 January 1981	Special Rept 80-03:on 801016,during Mode 1 Power Operation, Fuse in Channel RB2 Blew,Actuating Eecs Subsystem.Caused by Failed Relay in Engineering Safeguards Cabinet 5B.Relay Was Replaced & Functionally Tested
ML19350E200	11 June 1981	to Special Rept 80-3:on 801016,during Normal Operation,Fuse in Channel RB2 Failed,Giving 2 Out of 3 Condition Required for Actuation of Es Channel B.Caused by Failed Relay in Safeguards Cabinet 5B.Relay Replaced
ML20004G105	12 May 1981	Ro:On 810508,while Performing Surveillance Procedure SP-187, Auxiliary Bldg Exhaust Ventilation Sys Testing,Discovered That Three Filter Banks Had Been Inoperable Since 810505, Exceeding Tech Spec 3.7.8.1.Plant Shut Down to Hot Standby
ML20006D672	5 February 1990	Special Rept 90-01:891228,waste Gas Decay Tank H & Oxygen Monitoring Channels Removed from Svc & Not Returned to Operational Status within 14 Days.Caused by Leakage from Fittings in Tubing.Mod Procedure Developed
ML20006G009	21 February 1990	Special Rept 90-02:on 900122,plant Shutdown Initiated Due to Unidentified Leakage in Rcs.Dose Equivalent Iodine Exceeded Tech Spec Limit.Sampling & Analysis of RCS Continued at 4 H Intervals Until Iodine Decreased to Below Tech Spec Levels	Unidentified leakage
ML20009F974	23 July 1981	Ro:On 810722,during Power Escalation Following end-of-cycle Control Rod Withdrawal,Heat Balance Calculations Indicated That All Nuclear Instrumentations 5,6,7 & 8 Were Less Conservative by Amount Exceeding 0.8%
ML20011A906	27 October 1981	Telecopy Message of Ro:On 811027,notification Was Received That Potential High Energy Pipe Whip &/Or Jet Impingement Could Cause Possible Loss of safety-related Sys &/Or Components.Detailed Rept Will Follow within 14 Days
ML20038B505	1 December 1981	Ro:On 811106,during Switch from Decay Heat Removal on B Train to a Train,Approx 800 Gallons of Water from Borated Water Storage Tank Overfilled RCS & Spilled Water on Reactor Bldg Floor.Event Not Reportable Per 10CFR20.403(b)(4)
ML20040F836	2 February 1982	Ro:On 820102,while Performing Surveillance on Power Operated Relief Valve Block Valve (RCV-11),discovered Valve Would Not Cycle to Full Closed Position.Cause Not Determined.Valve Closed Manually.Repairs Effected 820128
ML20049A330	21 August 1980	Ro:On 800821,during Surveillance of Circulating Water Discharge Temp,Temp at Point of Discharge Exceeded 103 F, Contrary to EIS 2.1.2.Cause Not Stated.Detailed Rept to Follow
ML20049A332	30 October 1980	Ro:On 801023,reactor Bldg Exhaust Monitor RM-A1 Was Discovered Operating in Degraded Mode.Caused by Maint Action.Reactor Bldg Purge Terminated at Time of Discovery. Detailed Rept Will Follow within 14 Days	Time of Discovery

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