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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20045D907 | 24 June 1993 | Special Rept:From 930511-0611,7 Fire Detectors in Circuit FLP3-3 Out of Svc for 32 Days.Caused by Failed Fire Detector.Detector Replaced & Containment Air Temps Monitored Hourly | |
| ML20044G537 | 28 May 1993 | Rev to 910925,1231 & 930731 Special Repts,Correcting Administrative Error in Equipment Designation of Passive Triaxial Peak Accelerograph.All Other Info Remains Unchanged | |
| ML20024H301 | 22 May 1991 | Special Rept:On 910412,loose Parts Detection Sys Declared Inoperable Due to Repetitive Spurious Alarms & Inoperable pre-amplifier Unit.Loose Parts Monitoring Troubleshooting Currently Under Review | |
| ML20043F825 | 8 June 1990 | Special Rept:On 890425,gas Sample Drawn from PASS Indicated Reactor Gases Not Removed from Liquid Sample Rcs.Four RCS Liquid Samples Successfully Obtained & Two of 4 Samples Produced RCS Dissolved Gas Samples | |
| ML20042G891 | 7 May 1990 | Special Rept:On 900408,pressurizer Spray Valve Failed Open Causing Depressurization of Rcs.Caused by Equipment Malfunction.Feedback Arm Holding Screw on Pressurizer Spray Valves Replaced W/Longer Screws & Secured W/Locknuts | Unanalyzed Condition |
| ML20006C214 | 23 January 1990 | Special Rept:On 900102,radiation Monitor Removed from Svc & 7-day Time Allowed Exceeded During Calibr.Replacement Detector on Order Since Nov 1989 & Will Be Replaced & Recalibr | |
| ML20005G128 | 2 January 1990 | Supplemental Special Rept:On 890716,2 of 12 Loose Parts Monitor Channels Declared Inoperable When Monitors Alarmed Continuously.Caused by Malfunctions in Equipment Inside Containment Bldg.Replacement Scheduled for Next Outage | High Radiation Area |
| ML19351C734 | 11 December 1989 | Special Rept:On 891110,turbine Electrical Trip Solenoid Valve Failed to Meet Surveillance Acceptance Criteria. Caused by Particulate Contamination in Secondary or Electronic Trip Valves.Valves Replaced W/Rebuilt Valves | Downpower |
| ML20024D025 | 15 July 1983 | Ro:On 830421,following Preliminary Manual Test Insertion (Mti)Test,Actuation Module Lights Came on Due to Module Energizing.Cause Unknown.Operators Stationed to Mitigate Problems or Actuation If Mti Required | Boric Acid |
| ML20052D777 | 29 April 1982 | Ro:On 820415,steam Generator 1 Increased Primary to Secondary Leakage Rate of 0.049 Gpm from Valve.Cause of Leak Rate Unknown.Increase Appears to Be Related to Plant Shutdowns/Trips Experience in Thermal Cycling | |
| ML20050A008 | 18 March 1982 | RO Re Steam Generator Tube Plugging as Specified in Tech Spec 4.4.5.1.4.Degradation Resulting in Tube Plugging Is Characterized by Localized Areas of Small Pits on Tube Outside Diameter.Investigation of Corrosion Cause Continues | |
| ML20040F609 | 29 January 1982 | RO:30-day Rept & 10-day Rept Per App B ETS Re Excessive Liquid Waste Discharge & Excessive Level of Radioactivity.Caused by Steam Generator Primary Side to Secondary Side Leakage.Doses within Bases for 2.5 Ci Limit | |
| ML20039E040 | 28 December 1981 | RO 50-336/81-41:discovered Abnormal Degradation of Reactor Coolant Sys Pressure Boundary,Specifically,Steam Generator Tubes.Frequency of Occurrence Primarily on Cold Leg Side. Two-wk Rept Will Be Submitted | |
| ML19350F133 | 17 June 1981 | RO 50-336/81-20:Dresser Industries Model 31739A Safety Valves Found to Have Less than Min Upstream Inside Diameter. Caused by Facility Design.Significant Impact Unlikely | |
| ML20004E361 | 5 June 1981 | RO 81-018/03L-0:insp of safety-related Pipe Hangers Inside Containment Containing Mechanical Snubbers Revealed Snubbers Installed on Small Diameter Piping.Caused by Listing Not Including Review of Diameter Piping | |
| ML20003B649 | 17 February 1981 | RO 50-336/81-8:as-built Hanger Review of Reactor Vessel Head Vent Piping Sys Determined Spring Can Type Hanger Was Installed Incorrectly,Resulting in Overstressing Socket Welded Joint.Spring Can Hanger Removed | |
| ML20002D636 | 13 January 1981 | Ro:On 801209,inservice Insp Revealed That Required Valve Operability Tests Not Performed During Third Calendar Quarter 1980.Valves Successfully Tested.Action Taken to Assure Timely Review of Valve Test Data | Stroke time |
| ML19330C020 | 1 August 1980 | RO 80-26:water Seal for Piping Penetration in Refueling Water Storage Tank Pipe Tunnel Does Not Meet Design Requirements.Plugged Yard Storm Drain Caused Water Backup. Repairs to Water Seal Will Be Evaluated | |
| ML19323C357 | 9 May 1980 | RO 50-336/80-18:during Ongoing Hanger Base Plate Analysis Required by IE Bulletin 79-02,discovered That Several Svc Water Support Hangers Did Not Provide Factor of Safety Greater than Two.Repair Work on 12 Hangers Is Underway | |
| ML19294B677 | 23 January 1980 | Ro:On 791229,loss of Main Control Board Annunciators Occurred.Fourteen Power Supplies That Are Paralleled to Provide Voltages for Annunciator Electronics,Lamps & Field Contacts Failed.Surveillance Implemented | |
| ML19275A275 | 25 September 1979 | RO 50-336/79-27:during Engineering Review,Section of 4-inch Cast Iron Floor Drain Piping Passing Each Station Battery Was Found Not Supported in Accordance W/Design.Drain Working & Ductwork Removed |