United States Nuclear Regulatory Commission - Protecting People and the Environment

Part 21 Reports: 2011

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Log No Notifier Description Report Date Event No. / Accession No.
2011-60-00 Entergy Nuclear Operations Inc. Inoperable Service Water Pump Due to a Faulty Inertia Latch in a DB-50 Supply Breaker (a 10 CFR 50.73 report) 12/01/2011 ML11348A196
2011-59-00 Comanche Peak Unit 2 EDG 2-02 Inoperable Due to Remaining in the Droop Mode Versus Isochronous Mode (a 10 CFR 50.73 report) 12/14/2011 ML11356A220
2011-58-00 USEC UF6 Accumulator Tank Had Through Wall Cracks that Caused Leakage 12/20/2011 ML11362A352
2011-57-02 Dresser Consolidated Capacity Failure of Model 1982 Pressure Relief Valve 03/19/2012 ML12080A079
2011-57-01 Dresser Consolidated Capacity Failure of Model 1982 Pressure Relief Valve 01/09/2012 ML12011A050
2011-57-00 Dresser Consolidated Capacity Failure of Model 1982 Pressure Relief Valve 12/20/2011 ML11361A393
2011-56-01 Fisher Controls Possible Disc Pin Issue on a Fisher Type A11 Butterfly Valve 01/23/2012 ML12025A168
2011-56-00 Fisher Controls Possible Disc Pin Issue on a Fisher Type A11 Butterfly Valve 12/13/2011 ML11348A244
2011-55-01 Flowserve Potential Defective Part in Limitorque SMB-0 Heavy Spring Pack 06/27/2012 ML12181A143
2011-55-00 Flowserve Potential Defective Part in SMB-0 Heavy Spring Pack 12/06/2011 ML11342A072
2011-54-00 Curtiss Wright Flow Control Co. Defective Spring Clips Used as Seismic Restraints on Two Scientific Modules 12/05/2011 ML11341A060
2011-53-00 Flowserve Limitorque SMB-5T Actuator Clutch Lug Failure 11/29/2011 ML11334A077
2011-52-00 North Anna 3 Early Site Permit Postulated Seismic Acceleration is Less than Projected Based on New Information 11/16/2011 ML11321A323
2011-51-00 Browns Ferry GE HGA Relay Failure Causes Core Spray to be Inoperable (a 10 CFR 50.73 Report) 10/14/2011 ML11287A036
2011-50-01 Baldor Electric Co Motor Power Leads Undersized 12/22/2011 ML12003A224
2011-50-00 Baldor Electric Co Motor Power Leads Undersized 11/09/2011 ML11318A023
2011-49-01 Seabrook General Electric CR-120B Relays Supplied by National Technical Systems Fail Bench Test 11/17/2011 ML11327A010
2011-49-00 Seabrook General Electric CR-120B Relays Supplied by National Technical Systems Fail Bench Test 11/01/2011 ML11306A194
2011-48-00 Waterford Vendor Notification of Non-Conforming Part Renders Both Trains of QSPDS Inoperable (a 10 CFR 50.73 Report) 09/26/2011 ML11272A035
2011-47-00 Palisades Service Water Pump Shaft Coupling Failure (a 10 CFR 50.73 Report) 10/03/2011 ML112760550
2011-46-01 Louisiana Energy Services Potentially Undersized Welds on Centrifuge T-Column Base Plate Connectors 11/23/2011 ML11329A081
2011-46-00 Louisiana Energy Services Potentially Undersized Welds on Centrifuge T-Column Base Plate Connectors 10/21/2011 ML11298A191
2011-45-00 Engine Systems, Inc. Emergency Diesel Generator Piston Delamination 10/18/2011 ML11298A190
2011-44-01 ATC Nuclear Notification of Defective Moore 535 Controllers 07/07/2012 ML121910333
2011-44-00 ATC Nuclear Notification of Defective Moore 535 Controllers 10/06/2011 ML11284A017
2011-43-00 Ametek SolidState Controls Diode Failures Due to Deterioration 09/28/2011 ML11277A271
2011-42-00 Rosemount Nuclear Instruments Notification that Certain Rosemount Pressure Transmitters May Not Perform Their Intended Safety Function 09/06/2011 ML11251A198
2011-41-01 Emerson Process Management, LLC Possible Weld Rod Certification Issues 09/07/2011 ML11252B082
2011-41-00 Emerson Process Management, LLC Possible Weld Rod Certification Issues 08/05/2011 ML11221A104
2011-40-00 Engine Systems, Inc. Emergency Diesel Generator Failed Air Start Motor 08/01/2011 ML11215A009
2011-39-01 Qualtech NP Potential Defects in Qualtech NP Safety Related Motor Control Center Buckets 08/05/2011 ML11220A349
2011-39-00 Qualtech NP Potential Defects in Qualtech NP Safety Related Motor Control Center Buckets 07/15/2011 ML11214A109
2011-38-00 ABB, Inc. Defective Capacitors Cause Under-Frequency Trip Setpoint Drift In ABB KF Protective Relays 07/22/2011 ML11214A108
2011-37-01 Browns Ferry Inadequate Design of EDG Governor Hydraulic Oil Pipe Causes Leak (a 10 CFR 50.73 report supplement) 03/21/2012 ML12083A194
2011-37-00 Browns Ferry Inadequate Design of EDG Governor Hydraulic Oil Pipe Causes Leak (a 10 CFR 50.73 report) 06/27/2011 ML11180A267
2011-36-00 Beaver Valley, Unit 2 Defective Fuel Injection Pump Supply Lines Supplied by Manufacturer (a 10 CFR 50.73 Report) 05/19/2011 ML11145A171
2011-35-00 Emerson Process Management Valve Failed Leak Test Due To A Disc/Shaft Assembly Machining Issue 07/08/2011 ML11193A007
2011-34-00 Automatic Valve Corporation Seal Failure And Leakage Associated With Model B5497-301 Valves 07/01/2011 ML11186A891
2011-33-01 Summer Appendix R Analyses Fails to Recognize Hot-Short Failure Resulting in the Loss of An Essential Electrical Bus 06/29/2011 ML11186A904
2011-33-00 Summer Appendix R Analyses Fails to Recognize Hot-Short Failure Resulting in the Loss of An Essential Electrical Bus 06/29/2011 ML11182A917
2011-32-00 Fitzpatrick Rosemount Model 710 Trip Units Would Not Turn On During Testing 06/16/2011 ML11171A066
2011-31-01 Oconee Non-Conservative Valve Actuator Program Software 07/13/2011 ML11199A006
2011-31-00 Oconee Non-Conservative Valve Actuator Program Software 06/13/2011 EN 46955
2011-30-01 Shaw Areva MOX Services Applied Technical Services, Inc - Noncompliance to Percent Elongation Requirements On UT Standards Material 07/13/2011 ML11196A048
2011-30-00 Shaw Areva MOX Services Applied Technical Services, Inc - Noncompliance to Percent Elongation Requirements On UT Standards Material 06/09/2011 ML11164A148
2011-29-01 Flowserve Possible Deficiency in Environmental Testing of Limitorque Geared Limit Switch for Inside Containment 08/02/2011 ML11214A160
2011-29-00 Flowserve Possible Deficiency in Environmental Testing of Limitorque Geared Limit Switch for Inside Containment 06/03/2011 ML11159A031
2011-28-00 Velan Valve Potential Defect In Certain Velan Supplied Globe Valves 06/03/2011 ML11159A030
2011-27-00 Braidwood, Unit 1 Manufacturing Defect in ABB ITE-27N Undervoltage Relay (a 10 CFR 50.73 Report) 05/03/2011 ML111230612
2011-26-00 ASCO Valve, Inc. U-Rings Fabricated with Incorrect Material 05/12/2011 ML11136A217
2011-25-01 Engine Systems, Inc. Potential Defect in Magnetrol Level Switch from Engine Systems 05/13/2011 ML11146A108
2011-25-00 Engine Systems, Inc. Potential Defect in Magnetrol Level Switch from Engine Systems Incorporated 04/15/2011 ML11117A306
2011-24-01 Crystal River, Unit 3 Calculations for Reactor Vessel Internals Baffle Bolts Found Non-Conservative 07/13/2011 ML11203A514
2011-24-00 Crystal River, Unit 3 Calculations for Reactor Vessel Internals Baffle Bolts Found Non-Conservative 04/26/2011 ML11117A305
2011-23-01 ABB, Inc. SS5 Solid State Relays Trip Below Expected Current 09/28/2011 ML11273A048
2011-23-00 ABB, Inc. SS5 Solid State Relays Trip Below Expected Current 05/02/2011 ML111250239
2011-22-02 Curtiss Wright Flow Control Co. Potential Defect in Submersible Valve Position Sensors 01/04/2012 ML12006A203
2011-22-01 Curtiss Wright Flow Control Co. Potential Defect in Submersible Valve Position Sensors 08/12/2011 ML11234A046
2011-22-00 Curtiss Wright Flow Control Co. Potential Defect in Submersible Valve Position Sensors 04/22/2011 ML11126A231
2011-21-02 SOR Inc Process Instrumentation Pressure Switch With Possible Sub-Standard Electrical Lead Terminations 05/04/2011 ML11140A087
2011-21-01 SOR Inc Process Instrumentation Pressure Switch With Possible Sub-Standard Electrical Lead Terminations 05/04/2011 ML11126A015
2011-21-00 SOR Inc Process Instrumentation Pressure Switch With Possible Sub-Standard Electrical Lead Terminations 05/04/2011 EN 46821
2011-20-01 ABB, Inc. Potential Deviation In Seismic Ratings of ABB, Inc. KF Relay Family 07/14/2011 ML11208C457
2011-20-00 ABB, Inc. Potential Deviation In Seismic Ratings Of ABB Inc. KF Relay Family 04/15/2011 ML11117A307
2011-19-00 Varian Medical Systems, Inc. Potential Defect Identified in a Varian Medical Systems High Dose Rate Afterloader 04/15/2011 ML11117A308
2011-18-00 TE Connectivity NPKC-7-21A(N) Electrical Splice Kit with Possible Compromised Jacket Seal 04/14/2011 ML11115A039
2011-17-02 Browns Ferry, Unit 1 Failure of a Low Pressure Coolant Injection Flow Control Valve (a 10 CFR 50.73 Report Supplement) 09/30/2013 ML13275A139
2011-17-01 Browns Ferry, Unit 1 Failure of a Low Pressure Coolant Injection Flow Control Valve (a 10 CFR 50.73 Report Supplement) 02/10/2012 ML12045A343
2011-17-00 Browns Ferry, Unit 1 Failure of a Low Pressure Coolant Injection Flow Control Valve (a 10 CFR 50.73 Report) 04/01/2011 ML110960589
2011-16-00 Rotork Controls, Inc. Manufacturing Defect Discovered in 30NA1 Motor Cover Casting 04/07/2011 ML11103A051
2011-15-01 Shaw AREVA MOX Services Yield Strength Deviation on Nelson Post-Annealed Stainless Steel Studs 04/07/2011 ML111010192
2011-15-00 Shaw AREVA MOX Services Yield Strength Deviation on Nelson Post-Annealed Stainless Steel Studs ( Interim Report) 02/2/2011 ML110340154
2011-14-01 Louisiana Energy Services Turnbuckle Collar Threads Out of Tolerance 04/07/2011 ML11103A048
2011-14-00 Louisiana Energy Services Turnbuckle Collar Threads Out of Tolerance 03/24/2011 ML110890543
2011-13-00 Automatic Valve Corporation Valve Plunger Guide Malfunction 03/23/2011 ML110840037
2011-12-01 Fort Calhoun Station Defective Potter Brumfield Relays Discovered During Bench Testing 04/19/2011 ML111101512
2011-12-00 Fort Calhoun Station Defective Potter Brumfield Relays Discovered During Bench Testing 03/21/2011 ML110810064
2011-11-01 McGuire Nuclear Station Paint Chips Discovered in Woodward Governors 04/18/2011 ML11116A096
2011-11-00 McGuire Nuclear Station Paint Chips Discovered in Woodward Governors 03/18/2011 EN 46681
2011-10-00 Fisher Controls International Error in Butterfly Valve Body Drawing 03/04/2011 ML110670170
2011-09-00 Tyco Electronics Specific E7000 Relays with Defective Coils 02/28/2011 ML110610704
2011-08-00 ASCO Valve, Inc. Interim Report on NH90 Hydramotor Rotor-Shaft Assemblies 02/25/2011 ML110590892
2011-07-01 Palo Verde Nuclear Generating Station Misaligned Bell Alarm Switch Brackets on ABB K-600S 480 VAC Class 1E Circuit Breakers 03/23/2011 ML110950658
2011-07-00 Palo Verde Nuclear Generating Station Misaligned Bell Alarm Switch Brackets on ABB K-600S 480 VAC Class 1E Circuit Breakers 02/24/2011 ML110590886
2011-06-00 Oconee Nuclear Station Weld Discontinuities found in Structural Steel Components (Interim Report) 02/17/2011 ML110530493
2011-05-00 Fairbanks Morse Engine Linear Indications (hot tears) on Opposed Piston Emergency Diesel Generator Bearings 02/07/2011 ML110460122
2011-04-01 Catawba Nuclear Station Bus Disconnect Stab Assembly - 600V Essential Motor Control Centers 02/22/2011 ML110550615
2011-04-00 Catawba Nuclear Station Bus Disconnect Stab Assembly - 600V Essential Motor Control Centers 01/24/2011 ML110280015
2011-03-01 Oconee Nuclear Station Foreign Material Found in Spare Heat Exchanger 02/09/2011 ML110460030
2011-03-00 Oconee Nuclear Station Foreign Material Found in Spare Heat Exchanger 01/19/2011 ML110210121
2011-02-01 ABB, Inc. Potential Defect for COM5, COM9 and COM11 Overcurrent Relays 02/08/2011 ML110480083
2011-02-00 ABB, Inc. Potential Defect for COM5, COM9 and COM11 Overcurrent Relays 01/14/2011 ML110250193
2011-01-00 Fairbanks Morse Engine Potential Safety Hazard on Speed Switch Installed on Emergency Diesel Generator 01/18/2011 ML110190072

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Page Last Reviewed/Updated Monday, October 28, 2013