PNO-I-98-051, on 981112,licensee Shutdown Seabrook Station, After Visual Insp Indicated Damage to Main Generator a Phase Output bus.One-week Outage Planned to Troubleshoot & Repair Bus Ductwork.Licensee Did Not Issue Press Release
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| ML20155K559 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 11/13/1998 |
| From: | Cowgill C, Ray Lorson NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| References | |
| PNO-I-98-051, PNO-I-98-51, NUDOCS 9811160019 | |
| Download: ML20155K559 (1) | |
Similar Documents at Seabrook | |
|---|---|
Category:PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO
MONTHYEARPNO-I-98-051, on 981112,licensee Shutdown Seabrook Station, After Visual Insp Indicated Damage to Main Generator a Phase Output bus.One-week Outage Planned to Troubleshoot & Repair Bus Ductwork.Licensee Did Not Issue Press Release1998-11-13013 November 1998
[Table view]PNO-I-98-051:on 981112,licensee Shutdown Seabrook Station, After Visual Insp Indicated Damage to Main Generator a Phase Output bus.One-week Outage Planned to Troubleshoot & Repair Bus Ductwork.Licensee Did Not Issue Press Release PNO-I-98-022, on 980611,Seabrook Station Commenced Plant Shutdown After Declaring Control Bldg Air Conditioning Sys Inoperable.Licensee Evaluating Problems Associated W/Air Conditioning Sys.State of Nh Has Been Notified1998-06-12012 June 1998 PNO-I-98-022:on 980611,Seabrook Station Commenced Plant Shutdown After Declaring Control Bldg Air Conditioning Sys Inoperable.Licensee Evaluating Problems Associated W/Air Conditioning Sys.State of Nh Has Been Notified PNO-I-97-025A, on 970426,protest Related to Twentieth Anniversary of Mass Arrest at Seabrook in 1997 Update Made. Forty Protestors Arrested for Trespassing After Climbing owner-controlled Fence1997-04-28028 April 1997 PNO-I-97-025A:on 970426,protest Related to Twentieth Anniversary of Mass Arrest at Seabrook in 1997 Update Made. Forty Protestors Arrested for Trespassing After Climbing owner-controlled Fence PNO-I-97-025, on 970426,Clamshell Alliance Planning Twentieth Anniversary civil-disobedience Rally at Seabrook Site. Licensee Made Special Arrangements to Escort Reporters to Cover Demonstration from Inside Site Boundary Fence1997-04-25025 April 1997 PNO-I-97-025:on 970426,Clamshell Alliance Planning Twentieth Anniversary civil-disobedience Rally at Seabrook Site. Licensee Made Special Arrangements to Escort Reporters to Cover Demonstration from Inside Site Boundary Fence PNO-I-93-050, on 930907,security Force Member (Sfm) Accidentally Discharged Shotgun within Arms Room as Weapon Being Prepared for Storage.Weapon Had Already Been Unloaded & Cleared.Sfm Subjected to Fitness for Duty Testing1993-09-0707 September 1993 PNO-I-93-050:on 930907,security Force Member (Sfm) Accidentally Discharged Shotgun within Arms Room as Weapon Being Prepared for Storage.Weapon Had Already Been Unloaded & Cleared.Sfm Subjected to Fitness for Duty Testing PNO-I-90-055, on 900720,nonlicensed Supervisor Tested Positive from Drug Test Administered on 900718.Test Indicated Presence of Cocaine.Individual Unescorted Site Access Suspended for 14 Days.State of Nh Notified1990-07-23023 July 1990 PNO-I-90-055:on 900720,nonlicensed Supervisor Tested Positive from Drug Test Administered on 900718.Test Indicated Presence of Cocaine.Individual Unescorted Site Access Suspended for 14 Days.State of Nh Notified PNO-I-90-052, on 900702,power Reduction to 10% Initiated Due to Discovery That 6-inch Elbow in Heater Drain Tank Spill Line Thinned to Less than Required Min Wall Thickness & Offsite Phone Communication Degraded.State of Nh Notified1990-07-0303 July 1990 PNO-I-90-052:on 900702,power Reduction to 10% Initiated Due to Discovery That 6-inch Elbow in Heater Drain Tank Spill Line Thinned to Less than Required Min Wall Thickness & Offsite Phone Communication Degraded.State of Nh Notified PNO-I-90-048, on 900618,util Security Organization Notified of Bomb Threat Reported to State of Nh Police.Threat Received by Prof Psychic Providing Info on Patient Claiming to Possess Enough Dynamite to Blow Up Plant1990-06-19019 June 1990 PNO-I-90-048:on 900618,util Security Organization Notified of Bomb Threat Reported to State of Nh Police.Threat Received by Prof Psychic Providing Info on Patient Claiming to Possess Enough Dynamite to Blow Up Plant PNO-I-89-048C, on 890629,corporate Officer Relieved of Duties.Action Based on Executive Mgt Decision by Facility Owners Per Review of Action Taken Following Manual Reactor Trip Event1989-06-30030 June 1989 PNO-I-89-048C:on 890629,corporate Officer Relieved of Duties.Action Based on Executive Mgt Decision by Facility Owners Per Review of Action Taken Following Manual Reactor Trip Event PNO-I-89-048B, on 890626,W Russell Directed Formation of Augmented Insp Team to Review Circumstances Surrounding 890622 Manual Reactor Trip Event.Onsite Team Activities Currently Planned to Begin on 890628 & End on 8906301989-06-26026 June 1989 PNO-I-89-048B:on 890626,W Russell Directed Formation of Augmented Insp Team to Review Circumstances Surrounding 890622 Manual Reactor Trip Event.Onsite Team Activities Currently Planned to Begin on 890628 & End on 890630 PNO-I-89-048A, on 890623,TT Martin Issued Confirmatory Action Ltr (CAL) 89-11 Re 890622 Manual Reactor Trip Event.Cal Confirms Commitments Made by E Brown That Prior to Restart of Unit,Licensee Will Complete post-trip Review Process1989-06-23023 June 1989 PNO-I-89-048A:on 890623,TT Martin Issued Confirmatory Action Ltr (CAL) 89-11 Re 890622 Manual Reactor Trip Event.Cal Confirms Commitments Made by E Brown That Prior to Restart of Unit,Licensee Will Complete post-trip Review Process PNO-I-89-048, on 890622,reactor Manually Tripped While Natural Circulation Startup Test Being Conducted.Steam Dump Valve to Main Condenser Stuck Open Resulting in RCS Temp & Pressurizer Level Decrease.Operators Restored Charging Sys1989-06-22022 June 1989 PNO-I-89-048:on 890622,reactor Manually Tripped While Natural Circulation Startup Test Being Conducted.Steam Dump Valve to Main Condenser Stuck Open Resulting in RCS Temp & Pressurizer Level Decrease.Operators Restored Charging Sys PNO-I-89-045, on 890613,criticality Delayed for 7 Days Due to Problems W/Mods Made to Steam Supply Valves to Emergency Feedwater Pump Turbine.State of Nh & Commonwealth of Ma Notified1989-06-14014 June 1989 PNO-I-89-045:on 890613,criticality Delayed for 7 Days Due to Problems W/Mods Made to Steam Supply Valves to Emergency Feedwater Pump Turbine.State of Nh & Commonwealth of Ma Notified PNO-I-89-042, on 890601,instrumentation & Control Technician Shirt Contaminated w/Cl-36 While Handling Discarded Radiation Protector.Caused by Leaking Check Source.Skin Dose Estimate for Affected Individual Surveyed1989-06-0505 June 1989 PNO-I-89-042:on 890601,instrumentation & Control Technician Shirt Contaminated w/Cl-36 While Handling Discarded Radiation Protector.Caused by Leaking Check Source.Skin Dose Estimate for Affected Individual Surveyed ML20247L8621989-05-25025 May 1989 PNS-I-89-006:on 890524,Seabrook,NH Police Notified Plant of Bomb Threat Received by Boston Television Station.Licensee Determined Bomb Threat to Be Noncredible.Heightened Security Awareness Initiated in & Around Station ML20150B8341988-07-0505 July 1988 Corrected PNO-I-88-070:on 880702,public Meeting Held Re Emergency Preparedness Exercise on 880627-28.Meeting Attended by Approx 150 People W/Only Loud Verbal Comments & Heckling Occurring.Comments Received Negative & Positive PNO-I-87-031, on 870410,diver Working on Marker Buoy for Circulating Water Discharge Tunnel Diffusers Reported in Trouble & Slipped Below Water.Cause Unknown.Coast Guard Pulled Diver Out.Licensee Investigation in Progress1987-04-10010 April 1987 PNO-I-87-031:on 870410,diver Working on Marker Buoy for Circulating Water Discharge Tunnel Diffusers Reported in Trouble & Slipped Below Water.Cause Unknown.Coast Guard Pulled Diver Out.Licensee Investigation in Progress PNO-I-87-009, on 870211,both Doors of Equipment Hatch Air Lock Declared Inoperable.Caused by Failed Linkage on Mechanical Interlock for pressure-equalizing Ball Valves. Valves Closed Manually & Cooldown Per Tech Specs Terminated1987-02-11011 February 1987 PNO-I-87-009:on 870211,both Doors of Equipment Hatch Air Lock Declared Inoperable.Caused by Failed Linkage on Mechanical Interlock for pressure-equalizing Ball Valves. Valves Closed Manually & Cooldown Per Tech Specs Terminated ML20211B5931986-10-10010 October 1986 PNS-I-86-017:on 861009,disc Jockey at Radio Station in Leominster,Ma Received Telcon That Bomb Will Go Off at Plant Late This Wk or Next.Licensee Notified.Bomb Search Procedures Implemented W/Negative Results ML20214X4121986-09-29029 September 1986 PNS-I-86-016:on 860926,bomb Threat Received from United Front of America.Bomb Search & Mgt Recall Procedures Conducted.Three Pieces of Taped Pipe Found in Radwaste Processing Bldg Control Room.Fbi & State of Nh Notified ML20212N5581986-08-25025 August 1986 PNS-I-86-013:on 860824,Boston Globe Newspaper Received Bomb Threat Re Plants.Police Notified & Bomb Search Procedures Instituted W/Negative Results ML20206M3171986-06-25025 June 1986 PNS-I-86-009:on 860624,audio Cassette Tape Containing General Threat Message Against Plant Received by Governor of State of Nh.Search Procedure Implemented,Yielding Negative Results.Assessment of Threat Continuing PNO-I-86-007, on 860123,bomb-like Device Discovered in Containment Encl Ventilation Fan Room.Both Plant & State of Nh Police Notified.Plant Police Conducting Investigation.No Bomb Threat Received1986-01-24024 January 1986 PNO-I-86-007:on 860123,bomb-like Device Discovered in Containment Encl Ventilation Fan Room.Both Plant & State of Nh Police Notified.Plant Police Conducting Investigation.No Bomb Threat Received ML20198B3681982-08-0404 August 1982 PNS-I-82-007:on 820803,NRC Received Collect Call from Individual Identified as F Vola.Individual Stated, Seabrook Going to Blow Up. NRC Notified Region I Duty Officer & Licensee Security Organization Put on Alert ML20216J8831978-08-0202 August 1978 PNO-78-137:on 780721,const Permits for Plant,Units 1 & 2 Were Suspended,Effective 780721 ML20216K0321978-07-24024 July 1978 PNO-78-136:on 780721,construction Permit for Seabrook Facility Suspended.Since That Time No Work Performed. Applicant Taking Only Such Actions Necessary to Protect Environ Integrity of Site ML20249A6261978-06-28028 June 1978 PNS-78-030:on 780628,twelve Members of Protest Group, Southerners Mobilizing for Survival,Visited Region II Ofc to Stage Protest Against Licensing of Seabrook Nuclear Plant & to Request That Work Be Halted at Vogtle Plant ML20236L0381977-01-0606 January 1977 PNO-77-005:on 770106 Licensee Notified Region I That Board of Directors of Util Passed Resolution to Reduce Construction Activity at Seabrook Site to Lowest Practical Level Due to EPA Recent Decision Re Facility CWS 1998-06-12 Category:TEXT-INSPECTION & AUDIT & I&E CIRCULARS MONTHYEARIR 05000443/19990101999-09-24024 September 1999
[Table view]Insp Rept 50-443/99-10 on 990726-30 & 0809-13.No Violations Noted.Major Areas Inspected:Corrective Action Program IR 05000443/19990051999-08-25025 August 1999 Insp Rept 50-443/99-05 on 990621-0801.No Violations Noted. Major Areas Inspected:Aspects of Licensee Operations, Engineering,Maint & Plant Support ML20210P3251999-08-0303 August 1999 Notice of Violation from Insp on 980129-0527.Violation Noted:On 990116,Willimas Power Corp (Wpc),Contractor for Naesco,Discriminated Against Wpc Electrician Due to Employee Involvement in Protected Activity ML20210N5781999-08-0303 August 1999 Notice of Violation & Proposed Imposition of Civil Penalty in Amount of $55,000.Violation Noted:On 980116,licensee Contractor Discriminated Against Contractor Electrician Due to Employee Involvement in Protected Activity ML20210P3431999-08-0303 August 1999 Notice of Violation from Insp on 990129-0527.Violation Noted:On 980116,G Pageau Engaged in Deliberate Misconduct That Caused Naesco to Be in Violation of 10CFR50.7 ML20211A7351999-07-29029 July 1999 EN-99-029:on 990803,notice of Proposed Imposition of Civil Penalty in Amount of $55,000 Issued to Licensee.Based on Severity Level III Violation Involving Licensee Contractor That Discriminated Against Contractor Electrician IR 05000443/19990061999-07-26026 July 1999 Insp Rept 50-443/99-06 on 990510-0620.No Violations Noted. Major Areas Inspected:Aspects of Licensee Operations, Engineering,Maint & Plant Support,Including Security Controls ML20196E0261999-06-21021 June 1999 Insp Rept 50-443/99-01 on 990321-0509.Violations Noted. Major Areas Inspected:Aspects of Licensee Operations,Maint, Engineering & Plant Support IR 05000443/19990031999-05-20020 May 1999 Insp Rept 50-443/99-03 on 990308-0408.Non-cited Violations Noted.Major Areas Inspected:Licensee Engineering Activities Which Included in-depth Review of PCCW Sys IR 05000443/19990011999-04-20020 April 1999 Insp Rept 50-443/99-01 on 990207-0321.Violations Noted.Major Areas Inspected:Licensee Operations,Engineering,Maint & Plant Support IR 05000443/19980111999-02-26026 February 1999 Insp Rept 50-443/98-11 on 981228-990207.No Violations Noted.Major Areas Inspected:Licensee Operations,Engineering, Maint & Plant Support IR 05000443/19980101999-01-28028 January 1999 Insp Rept 50-443/98-10 on 981115-1227.No Violations Noted. Major Areas Inspected:Aspects of Licensee Operations, Engineering,Maint & Plant Support IR 05000443/19980091998-12-11011 December 1998 Insp Rept 50-443/98-09 on 981004-1114.Violations Noted. Major Areas Inspected:Operations,Engineering,Maintenance & Plant Support ML20198C1441998-12-11011 December 1998 Notice of Violation from Insp on 981004-1114.Violation Noted:On 981113, a Service Water & a Cooling Tower SWS Removed from Service to Conduct Planned Maint on SWS Valve & Applicable TS Action Statement Not Identified & Tracked IR 05000443/19983011998-11-25025 November 1998 NRC Operator Licensing Exam Rept 50-443/98-301 (Including Completed & Graded Tests) for Tests Administered on 981016- 981016-23.All Five SRO & All Four RO Applicants Passed All Portions of Exam PNO-I-98-051, on 981112,licensee Shutdown Seabrook Station, After Visual Insp Indicated Damage to Main Generator a Phase Output bus.One-week Outage Planned to Troubleshoot & Repair Bus Ductwork.Licensee Did Not Issue Press Release1998-11-13013 November 1998 PNO-I-98-051:on 981112,licensee Shutdown Seabrook Station, After Visual Insp Indicated Damage to Main Generator a Phase Output bus.One-week Outage Planned to Troubleshoot & Repair Bus Ductwork.Licensee Did Not Issue Press Release IR 05000443/19980061998-11-0606 November 1998 Insp Rept 50-443/98-06 on 980823-1003.No Violations Noted. Major Areas Inspected:Operations,Maint,Engineering & Plant Support IR 05000443/19980081998-10-16016 October 1998 Insp Rept 50-443/98-08 on 980921-25.No Violations Noted. Major Areas Inspected:Long Term MOV Program Under GL 89-10 Program at Seabrook Station & Will Review long-term MOV Program Under GL 96-05 IR 05000443/19980071998-10-0202 October 1998 Errata to Insp Rept 50-443/98-07 on 980803-07,including Coversheet & Executive Summary Pages ML20154B1681998-09-28028 September 1998 Insp Rept 50-443/98-09 on 980803-07.Violations Noted.Major Areas inspected:medium-voltage & low-voltage Power Circuit Breakers IR 05000443/19980051998-09-25025 September 1998 Insp Rept 50-443/98-05 on 980705-0822.No Violations Noted. Major Areas Inspected:Operations,Maint,Engineering & Plant Support Re Licensee Security Facilities & Equipment in Areas of Protective Area Assessment Aids IR 05000443/19980041998-07-30030 July 1998 Insp Rept 50-443/98-04 on 980517-0704.Violations Noted. Major Areas Inspected:Operations,Engineering,Maintenance & Plant Support ML20236W2411998-07-30030 July 1998 Notice of Violation from Insp on 980517-0704.Violation Noted:On 980504,licensee Did Not Take Action to Promptly Identify Whether Steam Pressure Protection Channels for a & D Steam Generators Operable,After Three Found Inoperable IR 05000443/19980031998-07-0909 July 1998 Insp Rept 50-443/98-03 on 980602-04.No Violations Noted. Major Areas Inspected:Insp Observed & Evaluated Licensee Biennial full-participation Exercise in Simulator Control Room,Technical Support Ctr & Operations Support Ctr PNO-I-98-022, on 980611,Seabrook Station Commenced Plant Shutdown After Declaring Control Bldg Air Conditioning Sys Inoperable.Licensee Evaluating Problems Associated W/Air Conditioning Sys.State of Nh Has Been Notified1998-06-12012 June 1998 PNO-I-98-022:on 980611,Seabrook Station Commenced Plant Shutdown After Declaring Control Bldg Air Conditioning Sys Inoperable.Licensee Evaluating Problems Associated W/Air Conditioning Sys.State of Nh Has Been Notified IR 05000443/19980021998-06-12012 June 1998 Insp Rept 50-443/98-02 on 980329-0516.No Violations Noted. Major Areas Inspected:Operations,Engineering,Maint & Plant Support ML20217L8231998-04-27027 April 1998 Notice of Violation from Insp on 980201-0328.Violation Noted:On 980313,inspector Identified That Four Individuals Performing Work Inside Posted Contaminated Area Failed to Comply W/Radiation Work Permits & Posted Instructions ML20217L8311998-04-27027 April 1998 Insp Rept 50-443/98-01 on 980201-0328.Violations Noted. Major Areas Inspected:Operations,Engineering,Maintenance & Plant Support ML20217L0631998-04-0101 April 1998 Notice of Violation from Insp on 971207-980131.Violation Noted:Measures Not Established to Assure That Significant Conditions Adverse to Quality Promptly Identified & Corrected ML20216B1271998-02-27027 February 1998 Insp Rept 50-443/97-08 on 971212-980131.No Violations Noted. Major Areas Inspected:Aspects of Licensee Operations, Engineering,Maint & Plant Support IR 05000443/19970091998-02-20020 February 1998 Insp Rept 50-443/97-09 on 971215-18 & 980120-21.Violations Noted.Major Areas Inspected:Maint ML20203E4091998-02-20020 February 1998 Notice of Violation from Insp on 971215-18 & 980120-21. Violations Noted:On 970313,licensee Changed Procedures as Described in UFSAR & Failed to Perform Written SE to Determine That Change Did Not Involve USQ IR 05000443/19970991998-01-23023 January 1998 SALP Rept 50-443/97-99 for 960505-971206 IR 05000443/19970071998-01-0707 January 1998 Insp Rept 50-443/97-07 on 971005-1206.No Violations Noted. Major Areas Inspected:Operations,Engineering,Maint & Plant Support Re Implementation of Security Program ML20199L3191997-11-20020 November 1997 Notice of Violation from Insp on 970816-1004.Violation Noted:Mfp Reassembled & Tested W/O Terminating Lead (D4) Defeating Electrical Trip Capability of MFP IR 05000443/19970061997-11-20020 November 1997 Insp Rept 50-443/97-06 on 970816-1004.Violations Noted.Major Areas Inspected:Licensee Operations,Engineering, Maint & Plant Support IR 05000443/19970051997-10-27027 October 1997 Insp Rept 50-443/97-05 on 970825-0910.No Violations Noted. Major Areas Inspected:Process of Operating Experience, Trending,Tagging & self-assesment ML20211G0121997-09-23023 September 1997 Insp Rept 50-443 on 970616-0815.Violations Noted.Major Areas Inspected:Operations,Maint,Engineering & Plant Support & Emergency Preparedness Program ML20211G0061997-09-23023 September 1997 NOV from Insp on 970616-0815.Violation Noted:Staff Changed Lineup of Safety Injection Sys Test Header from Primary Drain Tank to Refueling Water Storage Tank W/O Properly Changing Procedure Os 1005.05,Safety Injection Operation ML20210N5811997-08-13013 August 1997 Corrected NOV Consisting of Revised Pages IR 05000443/19970031997-08-13013 August 1997 Corrected Insp Rept 50-443/97-03 Consisting of Changes to Section S1.2.c ML20196J6501997-07-30030 July 1997 Notice of Violation from Insp on 970522.Violation Noted: Vehicle Number Ldv 16-02 Found Unattended W/Keys in Ignition & Running & Not in Control of Authorized Person ML20196J6691997-07-30030 July 1997 Insp Rept 50-443/97-03 on 970415-0615.Violations Noted.Major Areas Inspected:Operations,Maint,Engineering & Plant Support ML20140D1281997-05-30030 May 1997 Insp Rept 50-443/97-02 on 970304-0414.Violations Noted. Major Areas Inspected:Operations,Engineering,Maintenance & Plant Support ML20140D1241997-05-30030 May 1997 Notice of Violation from Insp on 970304-0414.Violation Noted:On 950305,35 Licensee Designated Vehicles in Use Outside Protected Area for Purposes Other than Servicing, Repairs,Emergencies or Moving Supplies from Warehouse PNO-I-97-025A, on 970426,protest Related to Twentieth Anniversary of Mass Arrest at Seabrook in 1997 Update Made. Forty Protestors Arrested for Trespassing After Climbing owner-controlled Fence1997-04-28028 April 1997 PNO-I-97-025A:on 970426,protest Related to Twentieth Anniversary of Mass Arrest at Seabrook in 1997 Update Made. Forty Protestors Arrested for Trespassing After Climbing owner-controlled Fence PNO-I-97-025, on 970426,Clamshell Alliance Planning Twentieth Anniversary civil-disobedience Rally at Seabrook Site. Licensee Made Special Arrangements to Escort Reporters to Cover Demonstration from Inside Site Boundary Fence1997-04-25025 April 1997 PNO-I-97-025:on 970426,Clamshell Alliance Planning Twentieth Anniversary civil-disobedience Rally at Seabrook Site. Licensee Made Special Arrangements to Escort Reporters to Cover Demonstration from Inside Site Boundary Fence IR 05000443/19970011997-04-0808 April 1997 Insp Rept 50-443/97-01 on 970114-0303.No Violations Noted. Major Areas Inspected:Licensee Operations,Engineering,Maint & Plant Support IR 05000443/19960111997-03-0707 March 1997 Insp Rept 50-443/96-11 on 961130-970113.No Violations Noted. Major Areas Inspected:Operations,Maint,Engineering & Plant Support ML20133A5351996-12-24024 December 1996 Notice of Violation from Insp on 961001-1129.Violation Noted:On 940127,licensee Implemented Change 1 to Rev 7 to Station Procedure, Startup Feed Pump Operation, That Authorized Sys Configuration During Normal Plant Operation 1999-09-24 |
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November 13, 1998
~ PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-I-98-051 Thic' preliminary notification constitutes EARLY notice of events of POSSIBLE cafety 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.
Engility Licensee Emeroency Classification New Hampshire Yankee Notification of Unusual Event Saabrook 1 Alert 1
Manchester,New Hampshire Site Area Emergency Dockets: 50-443 General Emergency 1 X Not Applicable l l
Subject:
REACTOR SHUTDOWN IN EXCESS OF 72 HOURS The licensee shut down Seabrook Station on November 12, 1998, after a visual inspection indicated damage to the main generator "A" phase output bus. The bus degradation was detected during a routine predictive maintenance activity, which identified elevated temperatures external to i the bus'ductwork. The damage occurred on the ductwork and the flexible connections to the input of the generator step-up (GsU) transformer. This transformer and bus also serve as one of the offsite power sources. The
. operators are in the process of placing the unit in the cold shutdown condition per the facility Technical Specification. The second offsite power supply and both emergency diesel generators are available. The t licensee formed an event team to determine the probable cause for the
. damage and to supervise the bus repairs. A one-week outage is planned to troubleshoot and repair the bus ductwork. -
The resident inspector observed portions of the plant shutdown and {
initial visual inspections of the bus ductwork. i i
The licensee did not issue a press release but did inform several members of the media.
Th~e state of New Hampshire and the Commonwealth of Massachusetts have been notified.
Contact:
R. Lorson C. Cowgill (603)474-3589 (610)337-5233 i
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