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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20028H386 | 26 December 1990 | Ro:On 901126,fuel Oil Leak Discovered in Standby Diesel Generator 23 During Standby Diesel Generator Actuation Test. Caused by Crack Across Threaded Portion of Delivery Valve Holder.Valve Holder & Valve Spring Replaced | |
| ML20042E656 | 18 April 1990 | Final Special Rept:On 891128,diesel Generator Valid Failure Occurred.Caused by Presence of Improperly Drilled & Repaired Oil Passage Hole Serving Articulated Rod Pin Bushing in Master Connecting Rod Assembly.Crankshift Webs Repaired | Finite Element Analysis |
| ML20012F127 | 29 March 1990 | Supplemental Special Rept:Correcting Design Description of Jacket Water Temp Switch,Per Two Nonvalid Failures of Standby Diesel Generator on 880813 & 26.Design Affects Extent of Corrective Action Taken to Prevent Recurrence | |
| ML20012E188 | 19 March 1990 | Special Rept:On 891227 & 900116,pressurizer Level Channel L-0466 Read Approx 10% Higher than Three Other Channels. Caused by Failure of Kerotest Valve to Fully Open,Preventing Steam from Entering Ref Leg.Ref Leg Filled | |
| ML20012C263 | 9 March 1990 | Special Rept:On 900209,standby Diesel Generator 11 Failed. Caused by Carbonization of 3UP Relay Socket & Base Due to Short Circuit During Tightening of Lug.Relay Socket & Base Cleaned & Diesel Successfully Tested | |
| ML20012B736 | 5 March 1990 | Special Rept:On 900202,discovered That Overspeed Fuel Shutoff & Governor Lever Valve Tripped.Caused by Operator Leaving Valve in Tripped Position While Performing Maint Activity on 900201.Valve Reset & Tested | |
| ML20005E188 | 27 December 1989 | Special Rept:On 891128,valid Failure of Diesel Generator Occurred.Caused by Improperly Drilled Oil Passage on Master Rod.Remedial Actions to Restore Standby Diesel Generator 22 Includes Crankshaft Straightening & Remachining | Finite Element Analysis |
| ML19354D740 | 21 December 1989 | Special Rept:On 891121,generator Voltage Regulator Transformer in Standby Diesel Generator 22 Local Control Panel Overheated.Caused by Missing Insulation Between Transformer Core & Mounting Bolt.Transformer to Be Replaced | |
| ML20011D230 | 6 December 1989 | Special Rept:On 891029 & 1104,Train C of Reactor Vessel Water Level Sys Observed Alternating Indicating Wet & Dry Conditions in Display Processing Sys in Control Room.Caused by Failure of Fiber Optic Link.Fiber Optic Modum Replaced | Reactor Vessel Water Level |
| ML19332E839 | 4 December 1989 | Special Rept:On 891103,test Declared Valid Failure When Standby Diesel Generator 22 Attained Output Frequency of 58 Hertz.Caused by Oxidation of Relay 4EX3 in Governor Control Circuit.Contacts Cleaned & Burnished | |
| ML19325D701 | 19 October 1989 | Special Rept:On 890919,nonvalid Failure of Standby Diesel Generator Occurred.Caused by Failure of Reactor Operator to Read Correct Instrument Prior to Synchronization of Diesel Generator.Synchronization Procedure Revised | |
| ML19320A791 | 26 June 1980 | Ro:On 800529,during Design Review,Seismic Qualification of Essential Cooling Water Intake Structure Gantry Crane & Diesel Generator Fuel Storage Tank Found W/Deficient Response Spectra Values.New Seismic Evaluation in Progress | Safe Shutdown Earthquake Operating Basis Earthquake |