PNO-I-98-062, on 981211,Millstone Unit 3 Tripped from 100% Reactor Power During MSIV Partial Stroke Testing.Solenoid Valve Integral to MSIV Failed to Reopen When Licensed Operator Released Test Switch
From kanterella
Jump to navigation
Jump to search
| ML20206N376 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 12/15/1998 |
| From: | Norman B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| References | |
| PNO-I-98-062, PNO-I-98-62, NUDOCS 9812170012 | |
| Download: ML20206N376 (1) | |
Similar Documents at Millstone | |
|---|---|
Category:PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO
MONTHYEARPNO-I-99-022, on 990509,Millstone Unit 2 Established Reactor Criticality.Nrc Staff Providing Augmented Insp Coverage of Restart Activities,Including round-the-clock Observations of Licensee Activities During Key Operational Evolutions1999-05-11011 May 1999
[Table view]PNO-I-99-022:on 990509,Millstone Unit 2 Established Reactor Criticality.Nrc Staff Providing Augmented Insp Coverage of Restart Activities,Including round-the-clock Observations of Licensee Activities During Key Operational Evolutions PNO-I-99-016, on 990406,operators Initiated Plant Cooldown from Normal Operating Pressure & Temp in Mode 3,hot Standby. Cooldown Was Necessary to Minimize Further Degradation of Bonnet Pressure Seal for Valve 2-SI-652 & to Repair Valve1999-04-0707 April 1999 PNO-I-99-016:on 990406,operators Initiated Plant Cooldown from Normal Operating Pressure & Temp in Mode 3,hot Standby. Cooldown Was Necessary to Minimize Further Degradation of Bonnet Pressure Seal for Valve 2-SI-652 & to Repair Valve PNO-I-99-006, on 990128,operators Inadvertently Reduced Spent Fuel Pool Water Level by Two Inches When Purification of Spent Fuel Pool Water Initiated.Operators Held Shift Briefing to Discuss Realigning Purification Sys1999-01-29029 January 1999 PNO-I-99-006:on 990128,operators Inadvertently Reduced Spent Fuel Pool Water Level by Two Inches When Purification of Spent Fuel Pool Water Initiated.Operators Held Shift Briefing to Discuss Realigning Purification Sys PNO-I-99-004, on 990115,carbon Dioxide Was Inadvertently Discharged Into Unit 3 Cable Spreading Room,Containing Electrical Wiring.Ambulance Reported to Site as Precautionary Measure.Licensee Assembled Event Review1999-01-20020 January 1999 PNO-I-99-004:on 990115,carbon Dioxide Was Inadvertently Discharged Into Unit 3 Cable Spreading Room,Containing Electrical Wiring.Ambulance Reported to Site as Precautionary Measure.Licensee Assembled Event Review PNO-I-99-001, on 981231,Millstone Unit 2 Began Reloading Fuel Into Reactor After Extended Shutdown.Millstone Unit 3 Went Critical on 981230,after Forced Outage Due to Inadvertent MSIV Closure During Surveillance Testing at Power1999-01-0404 January 1999 PNO-I-99-001:on 981231,Millstone Unit 2 Began Reloading Fuel Into Reactor After Extended Shutdown.Millstone Unit 3 Went Critical on 981230,after Forced Outage Due to Inadvertent MSIV Closure During Surveillance Testing at Power PNO-I-98-062, on 981211,Millstone Unit 3 Tripped from 100% Reactor Power During MSIV Partial Stroke Testing.Solenoid Valve Integral to MSIV Failed to Reopen When Licensed Operator Released Test Switch1998-12-15015 December 1998 PNO-I-98-062:on 981211,Millstone Unit 3 Tripped from 100% Reactor Power During MSIV Partial Stroke Testing.Solenoid Valve Integral to MSIV Failed to Reopen When Licensed Operator Released Test Switch PNO-I-98-039, 980812,Millstone Unit 3 Was Shutdown to Repair Small Leak on Afws Discharge Noted.Current Leakage Does Not Exceed Regulatory Requirements & Shutdown Not Required by Tech Specs.Licensee Issued Press Release on 9808111998-08-12012 August 1998 PNO-I-98-039:980812,Millstone Unit 3 Was Shutdown to Repair Small Leak on Afws Discharge Noted.Current Leakage Does Not Exceed Regulatory Requirements & Shutdown Not Required by Tech Specs.Licensee Issued Press Release on 980811 PNO-I-98-026, on 980701,Millstone Unit 3 Criticality Update Made.Nrc Staff Continues to Provide Augmented Insp of Unit 3 Restart Activities,Including round-the-clock Coverage of Key Operational.Licensee Plans No Press Release1998-07-0101 July 1998 PNO-I-98-026:on 980701,Millstone Unit 3 Criticality Update Made.Nrc Staff Continues to Provide Augmented Insp of Unit 3 Restart Activities,Including round-the-clock Coverage of Key Operational.Licensee Plans No Press Release PNO-I-98-025, on 980630,unit 3 Established Reactor Criticality,However Reactor Was Shut Down When Control Room Operator Noticed Spiking Intermediate Range Monitor.Licensee Troubleshooting1998-06-30030 June 1998 PNO-I-98-025:on 980630,unit 3 Established Reactor Criticality,However Reactor Was Shut Down When Control Room Operator Noticed Spiking Intermediate Range Monitor.Licensee Troubleshooting PNO-I-97-071, on 971124,licensee Announced Some Senior Level Mgt Changes.Ns Carns Resigned as Chief Nuclear Officer of Northeast Nuclear Energy Co,Effective 971201.Press Release Was Issued1997-11-24024 November 1997 PNO-I-97-071:on 971124,licensee Announced Some Senior Level Mgt Changes.Ns Carns Resigned as Chief Nuclear Officer of Northeast Nuclear Energy Co,Effective 971201.Press Release Was Issued PNO-I-90-041A, on 900509,75 Gallons of Contaminated Water Spilled Out of TN-RAM Cask & Into Trench.Cask Should Contain No free-standing Liquid.Cask Placed in Secured Parking Area within Burial Site.State of CT Notified1990-04-10010 April 1990 PNO-I-90-041A:on 900509,75 Gallons of Contaminated Water Spilled Out of TN-RAM Cask & Into Trench.Cask Should Contain No free-standing Liquid.Cask Placed in Secured Parking Area within Burial Site.State of CT Notified PNO-I-89-080, on 890922,NRC Presented Preliminary Results of Requalification Exams Indicating Failure of Two Crews. Licensee Preparing Justification for Continued Operation for Region I Mgt Review1989-09-22022 September 1989 PNO-I-89-080:on 890922,NRC Presented Preliminary Results of Requalification Exams Indicating Failure of Two Crews. Licensee Preparing Justification for Continued Operation for Region I Mgt Review PNO-I-89-076, on 890906,contaminated Equipment Located in Unrestricted Areas.Equipment Included Hydrolaze Unit & Tools.Licensee Initiated Survey as Result of Ongoing Internal Assessment1989-09-0707 September 1989 PNO-I-89-076:on 890906,contaminated Equipment Located in Unrestricted Areas.Equipment Included Hydrolaze Unit & Tools.Licensee Initiated Survey as Result of Ongoing Internal Assessment PNO-I-89-063, on 890721,NRC Team Insp of Allegations Re Facility Completed.Insp Dealt W/Approx 120 Concerns from Three Allegers.Preliminary Results Indicate 44 Allegations Unsubstantiated & 19 Not within Charter of Insp Team1989-07-26026 July 1989 PNO-I-89-063:on 890721,NRC Team Insp of Allegations Re Facility Completed.Insp Dealt W/Approx 120 Concerns from Three Allegers.Preliminary Results Indicate 44 Allegations Unsubstantiated & 19 Not within Charter of Insp Team PNO-I-89-039, on 890527,unidentified RCS Leakage Exceeded 2.5 Gpm & Plant Shutdown Initiated.Rcs Pressure Increased to 46 Gpm.Containment Entry Planned on 890530,after Deinerting. Maint Team Insp Initiated1989-05-30030 May 1989 PNO-I-89-039:on 890527,unidentified RCS Leakage Exceeded 2.5 Gpm & Plant Shutdown Initiated.Rcs Pressure Increased to 46 Gpm.Containment Entry Planned on 890530,after Deinerting. Maint Team Insp Initiated PNO-I-89-028, on 890411,shutdown Initiated from Full Power When RCS Unidentified Leak Rate Reached 1.5 Gpm.Charging Flow Control Valves Closed to Limit Amount of Boron Injected.Caused by Crack on Leakage Monitoring Valve1989-04-13013 April 1989 PNO-I-89-028:on 890411,shutdown Initiated from Full Power When RCS Unidentified Leak Rate Reached 1.5 Gpm.Charging Flow Control Valves Closed to Limit Amount of Boron Injected.Caused by Crack on Leakage Monitoring Valve PNO-I-88-118, on 881113,licensee Shutdown Plant in Response to High Unidentified Leakage Into Primary Containment.Caused by Increase in Unidentified Drywell Leakage.Licensee Will Replace Topwork for Both D & E Safety Relief Valves1988-11-14014 November 1988 PNO-I-88-118:on 881113,licensee Shutdown Plant in Response to High Unidentified Leakage Into Primary Containment.Caused by Increase in Unidentified Drywell Leakage.Licensee Will Replace Topwork for Both D & E Safety Relief Valves PNO-I-88-111, on 881022,manual Reactor/Turbine Trip Was Initiated Due to Lowering Main Condenser Vacuum.High Suction Differential Pressure Conditions Caused by Seaweed Impingement.All MSIVs Were Closed1988-10-24024 October 1988 PNO-I-88-111:on 881022,manual Reactor/Turbine Trip Was Initiated Due to Lowering Main Condenser Vacuum.High Suction Differential Pressure Conditions Caused by Seaweed Impingement.All MSIVs Were Closed PNO-I-88-101, on 881005,MSIV C Closed Fully During Partial Stoke Testing of Valve,Causing Water Level Decrease in Steam Generator C & Reactor Trip on lo-lo Steam Generator Level. Shutdown Extended to Perform Maint on Valve1988-10-0606 October 1988 PNO-I-88-101:on 881005,MSIV C Closed Fully During Partial Stoke Testing of Valve,Causing Water Level Decrease in Steam Generator C & Reactor Trip on lo-lo Steam Generator Level. Shutdown Extended to Perform Maint on Valve PNO-I-88-060, on 880607,while at 100% Power,Cedm 23 Dropped Into Core.Licensee Investigation Found CEDM 23 Breaker Had Tripped on Overcurrent & Upper Gripper Coil Had Electrical Short.Plant Shut Down for Estimated 4 Days for Repair1988-06-0707 June 1988 PNO-I-88-060:on 880607,while at 100% Power,Cedm 23 Dropped Into Core.Licensee Investigation Found CEDM 23 Breaker Had Tripped on Overcurrent & Upper Gripper Coil Had Electrical Short.Plant Shut Down for Estimated 4 Days for Repair PNO-I-88-049, on 880506,plant Shutdown Commenced to Locate Source of Boric Acid Buildup on Control Element Drive Mechanism Coolers & Ventilation Shroud & Unidentified Leakage.Util Plans to Replace Reactor Vessel Head O-rings1988-05-0909 May 1988 PNO-I-88-049:on 880506,plant Shutdown Commenced to Locate Source of Boric Acid Buildup on Control Element Drive Mechanism Coolers & Ventilation Shroud & Unidentified Leakage.Util Plans to Replace Reactor Vessel Head O-rings PNO-I-88-041, on 880414,unidentified Leak Exceeded 6 Gpm Limit.Leak Identified from PORV Block Valve Packing Leakoff Line.Manual Valve in Leakoff Line Shut Off.Checks for Leaks & High Temp Investigation Continuing1988-04-15015 April 1988 PNO-I-88-041:on 880414,unidentified Leak Exceeded 6 Gpm Limit.Leak Identified from PORV Block Valve Packing Leakoff Line.Manual Valve in Leakoff Line Shut Off.Checks for Leaks & High Temp Investigation Continuing PNO-I-87-052, on 870605,reactor Trip Occurred Due to Closure of All Four Msivs.Caused by Loss of One of Two Safeguards Electrical Buses.On 870606,MSIV a Failed Part Stroke Testing.Reactor in Cold Shutdown for MSIV Repair1987-06-0808 June 1987 PNO-I-87-052:on 870605,reactor Trip Occurred Due to Closure of All Four Msivs.Caused by Loss of One of Two Safeguards Electrical Buses.On 870606,MSIV a Failed Part Stroke Testing.Reactor in Cold Shutdown for MSIV Repair PNO-I-87-043, on 870514,during Reactor Trip Breaker Response Time Testing,Reactor Trip Occurred.Steam Generator Feedwater Isolation Pressure Transient Resulted in Failure of Two Lines to Thermal Relief Valves.Cause Under Investigation1987-05-15015 May 1987 PNO-I-87-043:on 870514,during Reactor Trip Breaker Response Time Testing,Reactor Trip Occurred.Steam Generator Feedwater Isolation Pressure Transient Resulted in Failure of Two Lines to Thermal Relief Valves.Cause Under Investigation PNO-I-87-037, on 870425,util Employee Arrested Offsite for Possession of Coccaine W/Intent to Sell.Employee Authorization to Enter Vital Areas Terminated 1 H After Arrest1987-04-27027 April 1987 PNO-I-87-037:on 870425,util Employee Arrested Offsite for Possession of Coccaine W/Intent to Sell.Employee Authorization to Enter Vital Areas Terminated 1 H After Arrest PNO-I-87-007, on 870129,licensee Began Normal Shutdown of Facility to Repair Leak in Steam Generator SG-1.Leak Caused by Tube Defect.Plant Will Remain Shut Down for 17 to 18 Days.State of CT Informed1987-01-30030 January 1987 PNO-I-87-007:on 870129,licensee Began Normal Shutdown of Facility to Repair Leak in Steam Generator SG-1.Leak Caused by Tube Defect.Plant Will Remain Shut Down for 17 to 18 Days.State of CT Informed PNO-I-86-095, on 861130,unit Scrammed from 100% Power Due to Malfunction of Main Transformer,Loss of Generator Load & Turbine Overspeed.Transformer Disassembly in Progress to Determine Cause of Event1986-12-0101 December 1986 PNO-I-86-095:on 861130,unit Scrammed from 100% Power Due to Malfunction of Main Transformer,Loss of Generator Load & Turbine Overspeed.Transformer Disassembly in Progress to Determine Cause of Event ML20213G4721986-11-13013 November 1986 PNS-I-86-022:on 861113,handgun Detected on Employee by Metal Detector Upon Entering Site Protected Area.Gun Voluntarily Surrendered.Review of Employee Background Revealed Nothing Unfavorable PNO-I-86-064, on 860812,reactor Tripped Due to Low Pressure Output of Steam Generator Feedwater Pump gear-driven Pump. Investigation Underway1986-08-13013 August 1986 PNO-I-86-064:on 860812,reactor Tripped Due to Low Pressure Output of Steam Generator Feedwater Pump gear-driven Pump. Investigation Underway PNO-I-86-056, on 860724 Plant Shut Down Due to Open let- Down Sys Relief Valve.While Shut Down,Reactor Tripped on Low Steam Generator Level.Caused by Level Swings Due to Malfunctioning Valve Operators1986-07-25025 July 1986 PNO-I-86-056:on 860724 Plant Shut Down Due to Open let- Down Sys Relief Valve.While Shut Down,Reactor Tripped on Low Steam Generator Level.Caused by Level Swings Due to Malfunctioning Valve Operators ML20211F8401986-06-12012 June 1986 PNS-I-86-008:on 860612,during Random Search of Contract Employee Purse at Plant Entrance,Small Bag of Marijuana Found.Employee Turned Over to Local Law Enforcement Authorities & Employment Terminated PNO-I-86-020, on 860221,controlled Shutdown Occurred Due to Sulfate Concentrations Exceeding Owners Group Guideline of 20 Parts Per Billion.Caused by Condensate Demineralizer Resin Intrusion.Plans Made to Drain & Refill Generators1986-02-24024 February 1986 PNO-I-86-020:on 860221,controlled Shutdown Occurred Due to Sulfate Concentrations Exceeding Owners Group Guideline of 20 Parts Per Billion.Caused by Condensate Demineralizer Resin Intrusion.Plans Made to Drain & Refill Generators PNO-I-86-012, on 860206,during Routine Closure Surveillance, Inboard MSIV Failed to Close.Main Steam Lines Isolated.One Inboard MSIV Remains Open.Investigation & Repair of Valve Underway1986-02-0606 February 1986 PNO-I-86-012:on 860206,during Routine Closure Surveillance, Inboard MSIV Failed to Close.Main Steam Lines Isolated.One Inboard MSIV Remains Open.Investigation & Repair of Valve Underway PNO-I-85-088, on 851121,normal 345 Kv Offsite Power Lost as Result of Personnel Error During Surveillance of Offsite Power Source Breakers.Emergency Gas Turbine Generator Failed to Start.Shutdown Capability Lost for 5 Minutes1985-11-22022 November 1985 PNO-I-85-088:on 851121,normal 345 Kv Offsite Power Lost as Result of Personnel Error During Surveillance of Offsite Power Source Breakers.Emergency Gas Turbine Generator Failed to Start.Shutdown Capability Lost for 5 Minutes ML20138R0791985-11-14014 November 1985 PNS-I-85-015:on 851113,handgun Found in Driver Attache Case of tractor-trailer Exiting Plant Protected Area.Handgun Not Discovered During Entry Search.Driver Released Under Personal Recognizance PNO-I-85-073, on 851001,unit Placed in Cold Shutdown After Ground Fault Found in Reactor Coolant Pump Motor.Pump Motor Will Be Removed to Allow Util & GE to Determine Whether Fault Accessible1985-10-0202 October 1985 PNO-I-85-073:on 851001,unit Placed in Cold Shutdown After Ground Fault Found in Reactor Coolant Pump Motor.Pump Motor Will Be Removed to Allow Util & GE to Determine Whether Fault Accessible PNO-I-85-071A, on 850927,Hurricane Gloria Located at Northampton,Ma Moving in Northeasterly Direction.Status Downgrade to Tropical Storm Expected Early Evening on 850927.Salem Unit 1 & Millstone Complex Suffered Damage1985-09-27027 September 1985 PNO-I-85-071A:on 850927,Hurricane Gloria Located at Northampton,Ma Moving in Northeasterly Direction.Status Downgrade to Tropical Storm Expected Early Evening on 850927.Salem Unit 1 & Millstone Complex Suffered Damage PNO-I-85-071, on 850927,Hurricane Gloria Located 50 Miles East of Cape May,Nj.Reactor Facilities Located Along Coast Implementing Procedures Per Emergency Plans.Listed Plants Shutting Down.Oyster Creek Reduced Power Levels to 35%1985-09-27027 September 1985 PNO-I-85-071:on 850927,Hurricane Gloria Located 50 Miles East of Cape May,Nj.Reactor Facilities Located Along Coast Implementing Procedures Per Emergency Plans.Listed Plants Shutting Down.Oyster Creek Reduced Power Levels to 35% PNO-I-85-058, on 850813,reactor Tripped & Main Steam Line Isolation Occurred Due to Indicated Steam Line Area High Radiation.Caused by Air Introduction Into Feedwater Sys While Placing Demineralizer in Svc1985-08-14014 August 1985 PNO-I-85-058:on 850813,reactor Tripped & Main Steam Line Isolation Occurred Due to Indicated Steam Line Area High Radiation.Caused by Air Introduction Into Feedwater Sys While Placing Demineralizer in Svc PNO-I-85-050, on 850715,reactor Tripped from Full Power When Pressure Dropped to Thermal Margin/Low Pressure Setpoint of Approx 2,130 Psi.Caused by Failure of Both Pressurizer Spray Valves to Shut1985-07-16016 July 1985 PNO-I-85-050:on 850715,reactor Tripped from Full Power When Pressure Dropped to Thermal Margin/Low Pressure Setpoint of Approx 2,130 Psi.Caused by Failure of Both Pressurizer Spray Valves to Shut ML20198B3781982-11-19019 November 1982 PNS-I-82-016:on 821119,New London,Ct Police Dept Received Bomb Threat from Male Caller Stating That Bomb Was Planted in Unit 3.Evacuation Was Initiated & All Areas Searched Resulting W/Negative Results ML20198B4831982-10-25025 October 1982 PNS-I-82-014:on 821025,Stone & Webster Telephone Operator Received Telephone Bomb Threat from Unidentified Caller Through Site Commercial Lines.Licensee Ordered Evacuation & Initiated Search.No Bomb Was Found PNO-I-82-054, on 820723,after Purging Unit 2 Containment Through Encl Bldg Filtration Sys to Unit 1 Vent Stack,Unit 2 Stack Gaseous Release Rates Exceeded Administrative Limits. Caused by Mispositioned Valve in Encl Bldg Exhaust Sys1982-07-26026 July 1982 PNO-I-82-054:on 820723,after Purging Unit 2 Containment Through Encl Bldg Filtration Sys to Unit 1 Vent Stack,Unit 2 Stack Gaseous Release Rates Exceeded Administrative Limits. Caused by Mispositioned Valve in Encl Bldg Exhaust Sys PNO-I-80-043, on 800318,one Truck Full of Chlorine Rail Tank Car Derailed at Broken Switch on Licensee Property.Car Presently Located Outside Protected Area,But Is Upright, Intact, & Stable.Formulating Plans to Replace Car on Rail1980-03-18018 March 1980 PNO-I-80-043:on 800318,one Truck Full of Chlorine Rail Tank Car Derailed at Broken Switch on Licensee Property.Car Presently Located Outside Protected Area,But Is Upright, Intact, & Stable.Formulating Plans to Replace Car on Rail ML20213D1651980-03-12012 March 1980 PNO-I-80-39:nonconservative Assumption Made in Analysis for Boron Dilution Accident Due to C-E Not Assuming RCS Water Vol Less than Total Vol of Sys.Could Cause Criticality After 10 Minutes of Rated Dilution Instead of 15 Minutes PNO-I-80-001, on 800104,isolation Condenser Isolated.Addl Insps of Containment Wall in Progress.Power Operation Will Continue Per Tech Specs for 15 Days.Precedures Require Power Be Reduced to 40% 24-h After Removing Condenser from Svc1980-01-0404 January 1980 PNO-I-80-001:on 800104,isolation Condenser Isolated.Addl Insps of Containment Wall in Progress.Power Operation Will Continue Per Tech Specs for 15 Days.Precedures Require Power Be Reduced to 40% 24-h After Removing Condenser from Svc ML20244A6191979-04-23023 April 1979 PNO-79-91:vapor Binding of Shutdown Cooling Sys Pump on 790314.Suction Restored;No Radioactive Matl Released to Environ ML20249A5891978-09-0505 September 1978 PNS-78-042:on 780903,watchman at Millstone Nuclear Power Station,Twice Attempted to Enter Protected Area W/Unloaded Pistol in Sock.After Second Incident,Watchman Ordered to Leave Site.Licensee Tested Metal Detector ML20217A0621978-08-11011 August 1978 PNO-78-143:on 780811,during Delivery of Shipment of Hydrogen,Fire Started at Delivery Truck.Fire Was Confined to Rear of Truck & Extinguished ML20216J9471978-07-17017 July 1978 PNO-78-132:on 780714,reactor Shutdown to Replace Splices in Electrical Cables Located Inside Containment at Containment Electrical Penetrations 1999-05-11 Category:TEXT-INSPECTION & AUDIT & I&E CIRCULARS MONTHYEARIR 05000245/19990081999-09-14014 September 1999
[Table view]Insp Repts 50-245/99-08,50-336/99-08 & 50-423/99-08 on 990615-0809.Four Violations Noted & Being Treated as Ncvs. Major Areas Inspected:Operations,Maint,Engineering & Plant Support IR 05000423/19990071999-08-27027 August 1999 Insp Rept 50-423/99-07 on 990614-0715.Violations Noted & Being Treated as Ncvs.Major Areas Inspected:Review of C/A Program Using IP 40500, Effectiveness of Licensee Controls in Identifying,Resolving & Preventing Problems IR 05000336/19990061999-07-19019 July 1999 Insp Repts 50-336/99-06 & 50-423/99-06 on 990420-0614.Ten Violations Occurred & Being Treated as non-cited Violations. Major Areas Inspected:Operations,Maint,Engineering & Plant Support IR 05000336/19982191999-06-10010 June 1999 Insp Rept 50-336/98-219 on 981214-18,990126-29,0208-19 & 0301-05.Noncited Violations Identified.Major Areas Inspected:Exam of Licensee Corrective Action Implementation IR 05000245/19990051999-06-0404 June 1999 Errata to Insp Repts 50-245/99-05,50-336/99-05 & 50-423/99-05,consisting of Figure 1 ML20207G1211999-06-0303 June 1999 Insp Repts 50-245/99-05,50-336/99-05 & 50-423/99-05 on 990302-0419.No Violations Noted.Major Areas Inspected: Operations,Maint,Engineering & Plant Support ML20207F1521999-05-25025 May 1999 Notice of Violation from Investigation Rept 1-94-021 on 940506-960329.Violation Noted:Between 740831-910407,licensee Made Changes to Facility Described in Safety Analysis Rept for Refueling Core Offloads Without Performing Evaluation ML20196K2621999-05-24024 May 1999 EN-99-020:on 980525,notice of Violation & Exercise of Enforcement Discretion Will Be Issued to Licensee.Action Based on Severity Level III Problem Consisting of Four Individual Violations Involving Refueling Outage PNO-I-99-022, on 990509,Millstone Unit 2 Established Reactor Criticality.Nrc Staff Providing Augmented Insp Coverage of Restart Activities,Including round-the-clock Observations of Licensee Activities During Key Operational Evolutions1999-05-11011 May 1999 PNO-I-99-022:on 990509,Millstone Unit 2 Established Reactor Criticality.Nrc Staff Providing Augmented Insp Coverage of Restart Activities,Including round-the-clock Observations of Licensee Activities During Key Operational Evolutions IR 05000336/19990031999-05-10010 May 1999 Insp Rept 50-336/99-03 on 990322-26.No Violations Noted. Major Areas Inspected:Review of Actions Taken by Util to Resolve Significant Issues List Item 21,fire Protection ML20206F4601999-04-30030 April 1999 Insp Rept 50-336/99-04 on 990315-31.Violation Noted.Major Areas Inspected:Monitored Licensee Activities During Plant Transition Between Operational Modes,Both During Normal & off-normal Working Hours PNO-I-99-016, on 990406,operators Initiated Plant Cooldown from Normal Operating Pressure & Temp in Mode 3,hot Standby. Cooldown Was Necessary to Minimize Further Degradation of Bonnet Pressure Seal for Valve 2-SI-652 & to Repair Valve1999-04-0707 April 1999 PNO-I-99-016:on 990406,operators Initiated Plant Cooldown from Normal Operating Pressure & Temp in Mode 3,hot Standby. Cooldown Was Necessary to Minimize Further Degradation of Bonnet Pressure Seal for Valve 2-SI-652 & to Repair Valve ML20205M7201999-04-0606 April 1999 Notice of Violation from NRC OI Case 1-96-002 & Conclusions of Millstone Independent Review Team.Violation Noted. E Debarba,Deliberately Discriminated Against Supervisor in Performance Engineering Group at Millstone Station ML20205M7351999-04-0606 April 1999 Notice of Violation from Investigation in Case Numbers 1-96-002 & 1-97-007.Violation Noted:Licensee Discriminated Against Supervisor in Performance Engineering Group at Plant Due to Involvement in Protected Activities IR 05000245/19990021999-04-0202 April 1999 Insp Repts 50-245/99-02,50-336/99-02 & 50-423/99-02 on 990112-0301.Violations Noted.Major Areas Inspected: Operations,Maint,Engineering & Plant Support IR 05000336/19990011999-03-29029 March 1999 Insp Rept 50-336/99-01 on 990117-0217.Violations Noted.Major Areas Inspected:Licensee C/A Program Implementation Using Guidance of NRC IP 40500, Effectiveness of Licensee Controls in Identifying,Resolving & Preventing Problems ML20205J0941999-03-12012 March 1999 Rept of Review of Millstone Units 1,2 & 3:Allegations of Discrimination in NRC Ofc of Investigations Cases 1-96-002, 1-96-007,1-97-007 & Associated Lessons Learned ML20207M1131999-03-0909 March 1999 Notice of Violation & Proposed Imposition of Civil Penalty in Amount of $88,000.Violation Noted:Employment of Two Contractor Employees Terminated in Aug 1997,in Part Because Individuals Raised Concerns Re MOV Program Manual ML20205G6161999-03-0909 March 1999 EN-99-010:on 990309,notice of Proposed Imposition of Civil Penalty in Amount of $88,000 Issued to Licensee.Action Based Upon Severity Level II Problem Involving Discrimination Against Two Contractor Employees at Millstone MOV Dept IR 05000245/19980061999-03-0101 March 1999 Insp Repts 50-245/98-06,50-336/98-06 & 50-423/98-06 on 981123-990111.No Violations Noted.Major Areas Inspected: Operations,Maintenance,Engineering & Plant Support PNO-I-99-006, on 990128,operators Inadvertently Reduced Spent Fuel Pool Water Level by Two Inches When Purification of Spent Fuel Pool Water Initiated.Operators Held Shift Briefing to Discuss Realigning Purification Sys1999-01-29029 January 1999 PNO-I-99-006:on 990128,operators Inadvertently Reduced Spent Fuel Pool Water Level by Two Inches When Purification of Spent Fuel Pool Water Initiated.Operators Held Shift Briefing to Discuss Realigning Purification Sys IR 05000245/19982171999-01-22022 January 1999 Evaluation Repts 50-245/98-217,50-336/98-217 & 50-423/98-217 Conducted on 981026-30.Areas Evaluated:Whether NNECO Has Improved Sufficiently & Has Demonstrated Sustained Performance in Maintaining safety-conscious Work Environ PNO-I-99-004, on 990115,carbon Dioxide Was Inadvertently Discharged Into Unit 3 Cable Spreading Room,Containing Electrical Wiring.Ambulance Reported to Site as Precautionary Measure.Licensee Assembled Event Review1999-01-20020 January 1999 PNO-I-99-004:on 990115,carbon Dioxide Was Inadvertently Discharged Into Unit 3 Cable Spreading Room,Containing Electrical Wiring.Ambulance Reported to Site as Precautionary Measure.Licensee Assembled Event Review IR 05000336/19980051999-01-0707 January 1999 Insp Repts 50-336/98-05 & 50-423/98-05 on 981006-1123. Violations Noted.Major Areas Inspected:Operations, Maintenance,Engineering & Plant Support ML20199C6381999-01-0707 January 1999 Notice of Violation from Insp on 981006-1123.Violation Noted:On or Before 981120,conduit 9-15,in Fire Area A-24,not Sealed & Tested in Accordance with Astme E-119,fire Endurance Test PNO-I-99-001, on 981231,Millstone Unit 2 Began Reloading Fuel Into Reactor After Extended Shutdown.Millstone Unit 3 Went Critical on 981230,after Forced Outage Due to Inadvertent MSIV Closure During Surveillance Testing at Power1999-01-0404 January 1999 PNO-I-99-001:on 981231,Millstone Unit 2 Began Reloading Fuel Into Reactor After Extended Shutdown.Millstone Unit 3 Went Critical on 981230,after Forced Outage Due to Inadvertent MSIV Closure During Surveillance Testing at Power PNO-I-98-062, on 981211,Millstone Unit 3 Tripped from 100% Reactor Power During MSIV Partial Stroke Testing.Solenoid Valve Integral to MSIV Failed to Reopen When Licensed Operator Released Test Switch1998-12-15015 December 1998 PNO-I-98-062:on 981211,Millstone Unit 3 Tripped from 100% Reactor Power During MSIV Partial Stroke Testing.Solenoid Valve Integral to MSIV Failed to Reopen When Licensed Operator Released Test Switch ML20195H6901998-11-18018 November 1998 Notice of Violation from Insp on 980818-1005.Violation Noted:Engineering Evaluations Not Performed When RCS Heatup Rate Limit Exceeded on 951217 & When RCS Cooldown Rate Limit Exceeded on Three occasions,940424,0728 & 951215 IR 05000245/19982161998-11-18018 November 1998 Insp Repts 50-245/98-216,50-336/98-216 & 50-423/98-216 on 980818-1005.Violations Noted.Major Areas Inspected: Operations,Maintenance,Engineering & Plant Support IR 05000336/19982031998-11-0505 November 1998 Insp Rept 50-336/98-203 on 980824-0904.No Violations Noted. Major Areas Inspected:Effectiveness of Configuration Mgt Plan ML20155B1521998-10-23023 October 1998 Notice of Violation from Insp on 980810-0903.Violation Noted:Design Basis,As Described in FSAR Chapter 14,Accident Analyses Had Not Been Correctly Translated Into Plant Procedures & Acceptance Criteria IR 05000336/19982131998-10-23023 October 1998 Insp Rept 50-336/98-213 on 980810-0903.Violations Noted. Major Areas Inspected:Certain Aspects of Accident Mitigation Sys IR 05000245/19982151998-10-14014 October 1998 Evaluation Repts 50-245/98-215,50-336/98-215 & 50-423/98-215 on 980824-28.Major Areas Evaluated:Whether Licensee Has Improved Sufficiently & Has Demonstrated Sustained Performance in Maintaining safety-conscious Work Environ IR 05000336/19980041998-10-0101 October 1998 Insp Rept 50-336/98-04 on 980914-18.No Violations Noted. Major Areas Inspected:Mov Program Associated with GL 89-10 IR 05000245/19982121998-09-25025 September 1998 Insp Repts 50-245/98-212,50-336/98-212 & 50-423/98-212 on 980630-0817.No Violations Noted.Major Areas Inspected: Operations,Maintenance,Engineering & Plant Support IR 05000423/19982111998-09-11011 September 1998 Insp Rept 50-423/98-211 on 980413-24,0511-15,27-29,0609-11 & 23-25.Violation Noted.Major Areas Inspected:Evaluation of Licensee C/As & Other ICAVP Process Activities ML20154D1151998-09-11011 September 1998 Notice of Violation from Insp on 980413-24-0511-15,27-29, 0609-11 & 23-25.Violation Noted:Program Implemented TS 6.8.4.a,failed to Include Provisions to Reduce Leakage from RSS Heat Exchangers to SW Sys IR 05000424/19980061998-09-10010 September 1998 Insp Repts 50-424/98-06 & 50-425/98-06 on 980628-0815.No Violations Noted.Major Areas Inspected:Aspects of Licensee Operations,Engineering,Maint & Plant Support PNO-I-98-039, 980812,Millstone Unit 3 Was Shutdown to Repair Small Leak on Afws Discharge Noted.Current Leakage Does Not Exceed Regulatory Requirements & Shutdown Not Required by Tech Specs.Licensee Issued Press Release on 9808111998-08-12012 August 1998 PNO-I-98-039:980812,Millstone Unit 3 Was Shutdown to Repair Small Leak on Afws Discharge Noted.Current Leakage Does Not Exceed Regulatory Requirements & Shutdown Not Required by Tech Specs.Licensee Issued Press Release on 980811 ML20237D3041998-08-12012 August 1998 Notice of Violation from Insp on 980413-0508.Violations Noted:Two Examples Identified Where Licensee Not Performing Leakage Testing of safety-related Valves in Sys That Could Contain Highly Radioactive Fluids During Accident IR 05000245/19982081998-08-12012 August 1998 Insp Repts 50-245/98-208,50-336/98-208 & 50-423/98-208 on 980428-0629.Violations Noted.Major Areas Inspected: Operations,Maint,Engineering & Plant Support ML20237B0741998-08-12012 August 1998 Notice of Violation from Insp on 980428-0629.Violation Noted:Licensee Failed to Direct Test Personnel to Close & Lock RHR Outboard Drain Valve IR 05000336/19982011998-08-12012 August 1998 Insp Rept 50-336/98-201 on 980413-0508.Violations Noted. Major Areas Inspected:Licensee Ability to Identify & Resolve Deficiencies Focusing,But Not Limited To,Period of CMP Implementation & ICAVP at Parsons Power Group,Inc PNO-I-98-026, on 980701,Millstone Unit 3 Criticality Update Made.Nrc Staff Continues to Provide Augmented Insp of Unit 3 Restart Activities,Including round-the-clock Coverage of Key Operational.Licensee Plans No Press Release1998-07-0101 July 1998 PNO-I-98-026:on 980701,Millstone Unit 3 Criticality Update Made.Nrc Staff Continues to Provide Augmented Insp of Unit 3 Restart Activities,Including round-the-clock Coverage of Key Operational.Licensee Plans No Press Release PNO-I-98-025, on 980630,unit 3 Established Reactor Criticality,However Reactor Was Shut Down When Control Room Operator Noticed Spiking Intermediate Range Monitor.Licensee Troubleshooting1998-06-30030 June 1998 PNO-I-98-025:on 980630,unit 3 Established Reactor Criticality,However Reactor Was Shut Down When Control Room Operator Noticed Spiking Intermediate Range Monitor.Licensee Troubleshooting IR 05000245/19982071998-06-19019 June 1998 Insp Repts 50-245/98-207,50-336/98-207 & 50-423/98-207 on 980301-0427.Violations Noted.Major Areas Inspected:Maint, Operations,Engineering & Plant Support ML20249C6931998-06-19019 June 1998 Notice of Violations from Combined Insp on 980301-0427. Violations Noted:Prior to 980424,instrument Min Accuracy of Wind Speed Channels Were Not Measured as Required by Table 3.3-8 of Unit 2 TS 3/4.3.3.4 IR 05000423/19970831998-06-12012 June 1998 Insp Rept 50-423/97-83 on 980413-24.Violations Noted. Major Areas Inspected:Readiness of Plant Hardware,Staff & Mgt Programs to Support Safe Restart & Continued Operation of Plant Unit 3 ML20249B0421998-06-12012 June 1998 Notice of Violations from Insp on 980413-24.Violations Noted:Only 1 RCS Loop Operable W/Plant in Mode 4 on 980407 IR 05000423/19970821998-06-11011 June 1998 Insp Rept 50-423/97-82 on 980209-20.Violations Noted.Major Areas Inspected:Corrective Actions Processes 1999-09-14 |
. _. _ . _ _ _ _ _ _ . . . _ . __ . .~ _ _. . _ . _
l ..
!: December 15. 1998 R
l [LRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-I-98-062 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially
' ' received without verification or evaluation, and is basically all that is ,
known by Region I staff in-King of Prussia, Pennsylvania on this date.
EacilitV Licensee Emeraency Classification i ~ Northeast Utilities Notification of Unusual Event '
l Millstone 3- .
Alert Waterford Connecticut Site Area Emergency i Dockets: 50-423 General Emergency ,
i X Not Applicable '
Subject:
UNPLANNED SHUTDOWN GREATER THAN 48 HOURS :
(EVENT NOS. 35137 AND 35143)
At approximately 8:45 a.m. on December 11, 1998. Millstone Unit 3 tripped l from 100 percent reactor power during main steam isolation valve (MSIV) partial stroke testing. A solenoid valve integral to the MSIV failed to l reopen when a licensed operator released a test switch. Instead of the MSIV reopening from 10 percent closed, the MSIV fully closed, causing the plant to trip from a low-low steam' generator level. Auxiliary feedwater i
! automa11cally started and brought steam generator level back to normal.
l Plant systems functioned normally and at 9:10 a.m., operators exited emergency operating procedures. Upon full closure of one MSIV, two of :
the five main steam safety valves lifted, to relieve the resultant pressure spike, and then reseated. Subsequent review of steam line i pressure conditions., safety valve setpoint tolerances, and automatic !
-relief valve controls verified the proper operation of their equipment.
' Later that evening after testing the remaining MSIV solenoid valves at r normal operating pressure and temperature, the licensee decided to take l the plant to cold shutdown (Mode 5) in order to investigate all abnormal solenoid valve test results. Subsequently, the licensee decided to j remove and inspect all thirty-two solenoid valves (eight per MSIV).
- During the shutdown, the licensee will also conduct other corrective
. maintenance and some troubleshooting activities on equipment requiring .
' Moce 5 conditions for repair. The licensee will not restart the plant
!'until this corrective maintenance is complete. The licensee is not
' planning to issue a press release.
l Thc State of Connecticut has been notified.
Contact:
BLUMBERG. NORMAN
- (610)337-5199 9812170012 981215 '
09 f PDR 18 E l PNO-I-98-062 PDR ' '
l ;g'ine
.