RA-17-072, License Amendment Request - Proposed Defueled Technical Specifications and Revised License Conditions for Permanently Defueled Condition
PNO-I-97-024, on 970422,Oyster Creek Nuclear Generating Station Commenced Controlled Shutdown of Unit Due to Equipment Problems.Unit Expected to Be Shut Down for Six Days for Correction of Diaphram Problem
PNO-I-96-086, on 961205,plant Engineers Identified Three Inadequate Cable Seperation Issues Affecting Reactor Protection Sys.Both Buttons of Either Pair of Trip Push Buttons Required to Be Depressed,To Initiate Manual Trip
SVP-99-057, Notifies of Change to Bases for TSs Section 3/4.5, ECCS, Re
05000237/LER-1986-009, :on 860401,seismic Evaluation of Control Room Panels for Mounting of Future Instrumentation Revealed Missing Mount Bolts.Caused by Initial Installation Deficiency.Bolts & Track Welds Installed
05000265/LER-1997-011-05, :on 970904,determined That Offgas H Sampling Frequency Was Less than That Required by Ts.Caused by Inadequate Tracking of LCO Actions Re Recombiner Temp.Began Sampling at Four H Intervals
05000254/LER-1986-039-02, :on 861117,discovered That Primary Containment Atmosphere Greater than 4% Due to Lack of Nitrogen.Caused by Nitrogen Supplier Not Delivering Nitrogen in Timely Manner. Discussions Held W/Nitrogen Suppliers
05000254/LER-1997-017-01, :on 970623,Unit 1 Entered 12 Hour Hot Shutdown LCO Inappropriately.Caused by Scheduling Error by Lup.Lups Were Counseled to Avoid Necessary Entry Into 12 H Hot Shutdown LCO
05000237/LER-1986-026-02, :on 861129,primary Containment Deinerted More than 24 H Prior to Shutdown.Caused by Personnel Error.Shift Supervisors Notified & Shutdown Procedures Changed Re Deinerting Time Restriction
05000265/LER-1987-004-10, :on 870218,suppression Chamber to Drywell Vacuum Breaker 2-1601-33A Would Not Return to Normal Closed Position After Being Tested.Caused by Either Slightly Dimpled Valve Bushing or Corroded Solenoid
05000265/LER-1997-001-07, :on 970227,instrument Maintenance Dept Was Performing Procedure to Test HPCI Initiation Logic.Caused by Deficient Procedure.Order Was Issued for All non-routine
05000237/LER-1985-044-04, :on 851213,discovered Power Cable to Diesel Generator 2/3 Cooling Water Pump Damaged & Generator 2 Tripped When Brought Offline.Caused by Use of Conduit as Support When Climbing Ladder
05000309/LER-1996-036, :on 961031,fans Stopped in Order to Allow Filters to Be Aligned in Bypass Mode Using Procedure.Caused by Note Alerting Operations Personnel.Painting Activities in Spray Bldg Stopped
05000249/LER-1985-005, :on 850216-17,caution Cards Inadvertently Hung on Unit 3 Diesel Generator Knife Switches Rather than Unit 2 Switches & Corresponding Unit 3 Switches Opened.Caused by Communications & Operator Error
05000309/LER-1996-039, :on 961207,both Diesel Generators Were Declared Inoperable & TS Remedial Action 3.12.A Entered.Caused by Oversight in Original Surveillance Procedure Development. Surveillance Procedures Modified
05000309/LER-1996-037, :on 961114,leaking P-29C Gland Cooling Check Valve Was Observed.Caused by Sticking Check Valve in Gland Cooling Water Supply Line to Pump.Affected Check Valves Have Been Replaced
05000254/LER-1996-020-01, :on 960907,CR Emergency Filtration Sys Declared Inoperable.Caused by Operator Knowledge Weakness.Operators Declared CR Emergency Filtration Sys Inoperable & Entered 14-day LCO
05000309/LER-1993-002, :on 930121,control Room Ventilation Trains Declared Inoperable Due to Preventive Maint.Consequences of Event Which Will Occurred Quarterly,Minimal Since Loss of Trains Short Duration (Less than 1 H)
05000219/LER-1996-003, :on 960409,determined Certain 4160 Vac Emergency Electrical Bus Grid Undervoltage Relay Contacts Not Functionally Tested Required by TS Table 4.1-1,Items 28 a & B.Caused by Inadequate Testing
05000254/LER-1996-006, :on 960210,TS 3.0.A Incorrectly Invoked Due to Procedural & Operator Knowledge Deficiencies.Policy Statement Developed & Presented to Licensed Operator Re Expectations for Use & Entry Into TS 3.0.A
05000249/LER-1985-005-05, :on 850216,undervoltage Protection on Bus 34-1 Lost.Caused by A-man Hanging Caution Cards on Wrong Knife Switches.Event Reviewed W/Operating Personnel.New Procedures for ECCS Undervoltage Test Created
05000454/LER-1995-003-10, :on 950913,containment Leak Detector Was Inoperable.Caused by Misinterpretation of TS Requirements by Shift Control Room Engineers Involved.Wrote Daily Order to Identify Correct Interpretation of TS 3.4.6.1
05000254/LER-1991-027-01, :on 911216,leak from Drain Valve,Water Drained Through a Floor Pipe Onto an Emergency Bus.Caused by Leak from Reactor Bldg Sys Through Manual Drain Valve Which Was Open.Drain Valve Closed
05000254/LER-1990-023, :on 901031,reactor Core Isolation Cooling & Core Spray Pumps Declared Inoperable
05000254/LER-1990-015-01, :on 900707,Tech Spec 3.0.A Entered.Caused by Inoperability of Reactor Bldg ECCS Room Drain Line Check Valves.Station Drawings Updated & Procedures Enhanced
05000309/LER-1993-014, :on 930701,inoperable ECCS During Pump Recirculation Valve Stroke Test Due to Failure of Original TS License Submittal & Current Regulatory Positions. Changed Frequency of Valve Test
05000309/LER-1993-012, :on 930527,both Trains of CR Ventilation Declared Inoperable as Result of Preventative Maint.Event Occurs Quarterly & Consequence Minimal Since Loss of Both Trains Short Duration (Less than 1 H)
05000254/LER-1990-009-03, :on 900518,determined That Various Containment Vols Not Leak Rate Tested Due to Recent 10CFR50,App J Interpretation Re Licensing Design Criteria.Mod M4-1(2)-89-167 Initiated
05000309/LER-1993-009, :on 921116,review of Rept Determined That ECCS Temporarily Disabled During Valve Stroke Testing.On 921202, Determined That Valves SIA-M-53 & SIA-M-54 Inoperable.Valve Stroke Testing Frequency Changed to Quarterly
05000249/LER-1986-026-03, :on 860911,drywell Oxygen Content Exceeded 4% for Greater than 24 H W/Mode Switch in Run.Caused by Personnel Error.Operating Procedures DOP-1600-5 & DOP 1600-6 Revised & Guidance Under Development
RA-08-011, Response to Request for Additional Information - Exelon/Amergen Application to Revise Technical Specifications Control Room Envelope Habitability in Accordance with TSTF-448, Revision 3, Using the Consolidated Line Item Improvement
PLA-5764, Proposed License Amendment Numbers 267 for Unit 1 and 232 for Unit 2 Mode Change Limitations Using the Consolidated Line Item Improvement (CLIIP) Process PLA-5764
05000309/LER-1993-011, :on 930525,integrity of Inner Door of Containment Hatch Compromised.On 930526,hatch Outer Door Opened for Maint on Inner Door & TS 3.0.A.2 Entered.Caused by Failure of O-ring to Seal Uniformly & Lubricant Buildup