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	Issue date	Title	Topic
PNO-IV-99-043, on 991016,earthquake of Magnitude 7 Occurred. Plant Operations Were Not Disrupted.Unusual Event Classifications Were Exited within 1 H at Both Facilities.No Damage Was Indicated & No Residual Plant Effects Observed	18 October 1999	PNO-IV-99-043:on 991016,earthquake of Magnitude 7 Occurred. Plant Operations Were Not Disrupted.Unusual Event Classifications Were Exited within 1 H at Both Facilities.No Damage Was Indicated & No Residual Plant Effects Observed	Earthquake
PNO-IV-99-018, on 990305,declared SONGS Units 2 & 3 Alert Because Potential Bomb Threat Occurred.Device Was 12-inch long,2-inch Diameter Copper Pipe,With Both Ends Capped. Licensee Notified State & Local Officials	5 March 1999	PNO-IV-99-018:on 990305,declared SONGS Units 2 & 3 Alert Because Potential Bomb Threat Occurred.Device Was 12-inch long,2-inch Diameter Copper Pipe,With Both Ends Capped. Licensee Notified State & Local Officials
PNO-IV-98-041, on 980918,control Room Operators Observed Alarm on One Channel of Main Condenser Steam Jet Air Ejector Radiation Monitoring Equipment,Which Indicated That Activity of Condenser Exhaust Had Increased by About Two Decades	18 September 1998	PNO-IV-98-041:on 980918,control Room Operators Observed Alarm on One Channel of Main Condenser Steam Jet Air Ejector Radiation Monitoring Equipment,Which Indicated That Activity of Condenser Exhaust Had Increased by About Two Decades
PNO-IV-97-038, on 970629,Unit 2 Entered Mode 3 & Mode 4 in Preparation for Draining to Midloop.Two Charging Lines to RCS Did Not Have Balanced Flow.Same Valve Was Found to Be Partially Stuck Closed in Units 2 & 3.Plant Shutdowned	30 June 1997	PNO-IV-97-038:on 970629,Unit 2 Entered Mode 3 & Mode 4 in Preparation for Draining to Midloop.Two Charging Lines to RCS Did Not Have Balanced Flow.Same Valve Was Found to Be Partially Stuck Closed in Units 2 & 3.Plant Shutdowned
PNO-V-93-020, on 931118,eddy Current Insp of Tubes Identified Potential Loose Parts in Four Locations in SG 88 & Three Locations in SG 89.Licensee Evaluating Source of Loose Parts	18 November 1993	PNO-V-93-020:on 931118,eddy Current Insp of Tubes Identified Potential Loose Parts in Four Locations in SG 88 & Three Locations in SG 89.Licensee Evaluating Source of Loose Parts
PNO-V-93-017, on 930922,util Informed NRC That re-review of Eddy Current Test Data Identified Midspan Indications in Two Tubes in Unit 3 SG31.Review Being Performed to Determine If Nonquantifiable Indications Exist.Telcon W/Nrc Scheduled	22 September 1993	PNO-V-93-017:on 930922,util Informed NRC That re-review of Eddy Current Test Data Identified Midspan Indications in Two Tubes in Unit 3 SG31.Review Being Performed to Determine If Nonquantifiable Indications Exist.Telcon W/Nrc Scheduled
PNO-V-93-016, on 930828,plant Restarted After Refueling Outage That Proceeded Tube Rupture Event on 930314.Cause of Tube Rupture Was Due to Intergranular Attack.Unit 3 Operating at 100% Power	30 August 1993	PNO-V-93-016:on 930828,plant Restarted After Refueling Outage That Proceeded Tube Rupture Event on 930314.Cause of Tube Rupture Was Due to Intergranular Attack.Unit 3 Operating at 100% Power
PNO-V-93-014, on 930811,NRC Was Informed That APS Supervisor Declined to Hire Contract Employee Because Employee Raised Safety Concerns at Plant & Elsewhere.Judge Ruled APS Discriminated Against Employee	11 August 1993	PNO-V-93-014:on 930811,NRC Was Informed That APS Supervisor Declined to Hire Contract Employee Because Employee Raised Safety Concerns at Plant & Elsewhere.Judge Ruled APS Discriminated Against Employee
PNO-V-93-009D, on 930325,leakage from Reactor Coolant Sys Occurred.Cause of Leak Not Determined	25 March 1993	PNO-V-93-009D:on 930325,leakage from Reactor Coolant Sys Occurred.Cause of Leak Not Determined
PNO-V-92-010, on 920331,plant Reactor Trip Breaker Failed to Open During Routine Surveillance Test.Licensee Has Unsuccessfully Attempted to Reproduce Failure,In Breaker Cubicle & on Test Stand in Electrical Shop	2 April 1992	PNO-V-92-010:on 920331,plant Reactor Trip Breaker Failed to Open During Routine Surveillance Test.Licensee Has Unsuccessfully Attempted to Reproduce Failure,In Breaker Cubicle & on Test Stand in Electrical Shop
PNO-V-91-016, on 910808,transmitter on Volume Control Tank Failed.Level Transmitter Repaired.Licensee Conducting Confirmatory Testing of Transmitter	9 August 1991	PNO-V-91-016:on 910808,transmitter on Volume Control Tank Failed.Level Transmitter Repaired.Licensee Conducting Confirmatory Testing of Transmitter
PNO-V-91-014, on 910715,licensee Inadvertently Drained 7,000 Gallons of Water from Spent Fuel Pool.Caused by Procedural Weakness.Health Physics Personnel Surveyed Area & Found Min Activity.Util Currently Removing Water from Radwaste Bldg	16 July 1991	PNO-V-91-014:on 910715,licensee Inadvertently Drained 7,000 Gallons of Water from Spent Fuel Pool.Caused by Procedural Weakness.Health Physics Personnel Surveyed Area & Found Min Activity.Util Currently Removing Water from Radwaste Bldg
PNO-V-90-047B, updates 901120 Occurrence of Inadvertent Actuation of Safety Injection & Containment Spray Sys	23 November 1990	PNO-V-90-047B:updates 901120 Occurrence of Inadvertent Actuation of Safety Injection & Containment Spray Sys
PNO-V-90-047A, on 901120,updates Occurrence of Inadvertent Actuation of Safety Injection & Containment Spray Sys	21 November 1990	PNO-V-90-047A:on 901120,updates Occurrence of Inadvertent Actuation of Safety Injection & Containment Spray Sys
PNO-V-90-047, on 901120,actuation Signal Initiated by Plant Protection Sys While Testing PPS Channel	20 November 1990	PNO-V-90-047:on 901120,actuation Signal Initiated by Plant Protection Sys While Testing PPS Channel
PNO-V-90-036, on 900910,small Amount of Contamination Found on Injured Worker Clothing During Transport to Hosp. Contaminated Clothing Removed Enroute to Hosp & Injuries to Worker Considered Minor.No Press Release Planned	10 September 1990	PNO-V-90-036:on 900910,small Amount of Contamination Found on Injured Worker Clothing During Transport to Hosp. Contaminated Clothing Removed Enroute to Hosp & Injuries to Worker Considered Minor.No Press Release Planned
PNO-V-90-035, on 900804,fire Discovered in Noncontaminated Laundry Room in Units 2 & 3 Shared Radwaste Bldg.Caused by Overheated Clothing Dryer.No Radiological Release Resulted from Fire & No safety-related Equipment Affected	6 August 1990	PNO-V-90-035:on 900804,fire Discovered in Noncontaminated Laundry Room in Units 2 & 3 Shared Radwaste Bldg.Caused by Overheated Clothing Dryer.No Radiological Release Resulted from Fire & No safety-related Equipment Affected
PNO-V-90-034, on 900728,unit 2 Was Shutdown to Inspect & Repair SG Feedrings,As Result of Degradation Found During Insp of Unit 3 SG Feedrings & Other Listed Work Was Performed	30 July 1990	PNO-V-90-034:on 900728,unit 2 Was Shutdown to Inspect & Repair SG Feedrings,As Result of Degradation Found During Insp of Unit 3 SG Feedrings & Other Listed Work Was Performed
PNO-V-90-001, on 891230,while at 12% Reactor Power W/Main Generator Sypplying Power to Grid Plants Unit 3 Phase a Main Transformer Experienced Internal Fault,Which Caused Immediate Trip of Main Generator Output Breakers	2 January 1990	PNO-V-90-001:on 891230,while at 12% Reactor Power W/Main Generator Sypplying Power to Grid Plants Unit 3 Phase a Main Transformer Experienced Internal Fault,Which Caused Immediate Trip of Main Generator Output Breakers
PNO-II-89-066, licensees Prepared for Adverse Weather Conditions Due to Hurricane.Briefings Held W/Key Managers on Responsibilities to Check All Trailers,Secure Crane Hooks & Increase Emergency Food Supplies	21 September 1989	PNO-II-89-066:licensees Prepared for Adverse Weather Conditions Due to Hurricane.Briefings Held W/Key Managers on Responsibilities to Check All Trailers,Secure Crane Hooks & Increase Emergency Food Supplies
PNO-II-89-066A, updates Status of Hurricane Hugo for Nuclear Facilities in Southeast.Manning of Incident Response Ctr by Region II Continuing	21 September 1989	PNO-II-89-066A:updates Status of Hurricane Hugo for Nuclear Facilities in Southeast.Manning of Incident Response Ctr by Region II Continuing
ML20247N007	11 September 1989	PNS-I-89-015:revised Notification of Telephone Threat, Correcting Event Date from 890909 to 890911.Call, Originating from Limerick or Peach Bottom,Received at Corporate Ofc.On 890525,threat Received at Peach Bottom
PNO-V-89-047, on 890808,earthquake & Aftershock of 5.1 & 4.2 Magnitudes,Respectively,Occurred Approx 15 Miles Southwest of San Jose,Ca.Reactors Shutdown During Earthquake.Tour of GE Reactor Disclosed No Damage	8 August 1989	PNO-V-89-047:on 890808,earthquake & Aftershock of 5.1 & 4.2 Magnitudes,Respectively,Occurred Approx 15 Miles Southwest of San Jose,Ca.Reactors Shutdown During Earthquake.Tour of GE Reactor Disclosed No Damage	Earthquake
PNO-IV-89-045, on 890703,earthquake Near Tremonton,Ut Occurred.Earthquake Safety Interlocks Did Not Trip & No Damage Occurred	5 July 1989	PNO-IV-89-045:on 890703,earthquake Near Tremonton,Ut Occurred.Earthquake Safety Interlocks Did Not Trip & No Damage Occurred	Earthquake
PNO-V-89-022, on 880403,earthquake of Magnitude of 4.5 on Richter Scale Occurred 10 Miles Northeast of San Jose,Ca. Automatic Seismic Protection Did Not Trigger Shutdown. Reactors Manually Shutdown.No Radioactive Release Occurred	3 April 1989	PNO-V-89-022:on 880403,earthquake of Magnitude of 4.5 on Richter Scale Occurred 10 Miles Northeast of San Jose,Ca. Automatic Seismic Protection Did Not Trigger Shutdown. Reactors Manually Shutdown.No Radioactive Release Occurred	Earthquake
PNO-IV-89-020, Region IV Notified of Recent Reactor Trip at Palo Verde Unit 3 That Was Complicated by Inability to Open Steam Generator Atmospheric Dump Valves Mfg by Control Components,Inc.No Sticking Problems Noted at Other Plants	23 March 1989	PNO-IV-89-020:Region IV Notified of Recent Reactor Trip at Palo Verde Unit 3 That Was Complicated by Inability to Open Steam Generator Atmospheric Dump Valves Mfg by Control Components,Inc.No Sticking Problems Noted at Other Plants
PNO-V-89-017, on 890315,Palo Verde Unit 2 Initiated Voluntary Shutdown Due to Failures of Adv to Operate at Units 1 & 3.Unit 2 Will Remains in Mode 3 Until Advs Are Demonstrated to Be Operable	16 March 1989	PNO-V-89-017:on 890315,Palo Verde Unit 2 Initiated Voluntary Shutdown Due to Failures of Adv to Operate at Units 1 & 3.Unit 2 Will Remains in Mode 3 Until Advs Are Demonstrated to Be Operable
PNO-V-89-007, on 890303,main Generator Tripped Followed by Reactor Power Cutback Due to Main Generator Trip & Reactor Trip on Low Steam Generator 2 Pressure.Increase in One Containment Sump Level Was Noted	3 March 1989	PNO-V-89-007:on 890303,main Generator Tripped Followed by Reactor Power Cutback Due to Main Generator Trip & Reactor Trip on Low Steam Generator 2 Pressure.Increase in One Containment Sump Level Was Noted	Safe Shutdown
PNO-I-88-116, on 881108,voters Voted Down state-wide Referendum to Shutdown Plants in State of Ma If Nuclear Waste Produced in Process	9 November 1988	PNO-I-88-116:on 881108,voters Voted Down state-wide Referendum to Shutdown Plants in State of Ma If Nuclear Waste Produced in Process
PNO-V-88-044, on 880627,earthquake Occurred 5 Miles East of Santa Cruz,Ca.Seismic Instrumentation Not Triggered at Vallecitos,Aerotest Operations or at Univ of California at Berkeley	27 June 1988	PNO-V-88-044:on 880627,earthquake Occurred 5 Miles East of Santa Cruz,Ca.Seismic Instrumentation Not Triggered at Vallecitos,Aerotest Operations or at Univ of California at Berkeley	Earthquake
PNO-V-88-038, on 880612,earthquake Occurred on Calaveras Fault within 50 Miles of Identified Facilities.All Reactors Shutdown at Time of Earthquake.No Seismic Trips Observed. Insp Revealed No Signs of Damage at Facilities	13 June 1988	PNO-V-88-038:on 880612,earthquake Occurred on Calaveras Fault within 50 Miles of Identified Facilities.All Reactors Shutdown at Time of Earthquake.No Seismic Trips Observed. Insp Revealed No Signs of Damage at Facilities	Earthquake
PNO-IV-88-040, on 880509,System Energy Resources,Inc to Manage & Operate All Middle South Nuclear Plants.Arkansas Power & Light & Louisiana Power & Light Will Apply for Appropriate License Amends	9 May 1988	PNO-IV-88-040:on 880509,System Energy Resources,Inc to Manage & Operate All Middle South Nuclear Plants.Arkansas Power & Light & Louisiana Power & Light Will Apply for Appropriate License Amends
PNO-V-88-014, on 880219,inadvertent Safety Injection Actuation Occurred While Testing of Actuation Logic Matrix Was in Progress & W/Unit at 100% Power.Unit Stabilized W/O Complication & Safety Injection Components Restored	22 February 1988	PNO-V-88-014:on 880219,inadvertent Safety Injection Actuation Occurred While Testing of Actuation Logic Matrix Was in Progress & W/Unit at 100% Power.Unit Stabilized W/O Complication & Safety Injection Components Restored
PNO-V-88-015, on 880221,safety Injection & Containment Isolation Actuation Signals Received Due to Low Pressurizer Pressure Signal.Caused by Incorrect Bypass of Pressurizer Low Pressure Protection When Unit Entered Mode 5	22 February 1988	PNO-V-88-015:on 880221,safety Injection & Containment Isolation Actuation Signals Received Due to Low Pressurizer Pressure Signal.Caused by Incorrect Bypass of Pressurizer Low Pressure Protection When Unit Entered Mode 5
PNO-I-88-020, on 880216,CA Mcneill Named Executive Director - Nuclear W/Responsibility of Directing Nuclear Operations, Including Nuclear Dept Reorganization & Restart Efforts of Peach Bottom	16 February 1988	PNO-I-88-020:on 880216,CA Mcneill Named Executive Director - Nuclear W/Responsibility of Directing Nuclear Operations, Including Nuclear Dept Reorganization & Restart Efforts of Peach Bottom
PNO-V-88-012, on 880211,moderate Earthquake,Measuring 4.7 on Richter Scale,Hit Whittier,Ca Area.No Seismic Alarms Activated at Plant.No Damage Identified at Site	11 February 1988	PNO-V-88-012:on 880211,moderate Earthquake,Measuring 4.7 on Richter Scale,Hit Whittier,Ca Area.No Seismic Alarms Activated at Plant.No Damage Identified at Site	Earthquake
PNO-I-88-017, on 880202,util to Announce Change to Corporate Mgt,Per Highly Critical INPO Ltr.Jh Austin Will Retire as of 880301 & Jl Everett Will Assume Duties of President Until Replacement Named	2 February 1988	PNO-I-88-017:on 880202,util to Announce Change to Corporate Mgt,Per Highly Critical INPO Ltr.Jh Austin Will Retire as of 880301 & Jl Everett Will Assume Duties of President Until Replacement Named
PNO-V-88-002, on 880116,reactor Shutdown Commenced for More than 48 H Due to Alarms on Main Generator Hydrogen Detraining Unit.Caused by Hydrogen Leak Into Stator Cooling Water Sys in Main Generator.Visual & Sonic Insps Performed	19 January 1988	PNO-V-88-002:on 880116,reactor Shutdown Commenced for More than 48 H Due to Alarms on Main Generator Hydrogen Detraining Unit.Caused by Hydrogen Leak Into Stator Cooling Water Sys in Main Generator.Visual & Sonic Insps Performed
PNO-I-88-001, on 880104,realignment of Nuclear Mgt Updated. Action Provides for Corporate Officer at Each Plant to Elevate Level of Plant in Corporate Mgt Structure	4 January 1988	PNO-I-88-001:on 880104,realignment of Nuclear Mgt Updated. Action Provides for Corporate Officer at Each Plant to Elevate Level of Plant in Corporate Mgt Structure
ML20234D183	28 December 1987	PNS-V-87-009A:on 871209,Region V Reported Licensee Investigating Rept of Card Playing in Security Alarm Station.Disiplinary Action:Three Supervisors Terminated & Nine Security Officers Suspended