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| Start date | Site | Title | Topic | |
|---|---|---|---|---|
| 05000266/LER-2008-001 | 16 January 2008 | Point Beach | Point Beach Nuclear Plant Unit 1 | Temporary Modification |
| 05000266/LER-2008-003 | 16 July 2008 | Point Beach | Appendix R Fire Scenario Resulting In Safe Shutdown Required Capability Not Maintained | Safe Shutdown Unanalyzed Condition |
| 05000266/LER-2011-001 | 27 November 2011 | Point Beach | Loss of Offsite Power to Unit 1 Safeguards Buses | |
| 05000266/LER-2012-003 | 6 June 2011 | Point Beach | 2B-04 Safeguards 480V Bus De-Energized | |
| 05000266/LER-2013-001 | 6 February 2013 | Point Beach | Loss of Offsite Power to Unit 1 Safeguards Buses | |
| 05000266/LER-2016-002 | 1 April 2016 31 May 2016 | Point Beach | Operation or Condition Prohibited by Technical Specifications LER 16-002-00 for Point Beach, Unit 1, Regarding Operation or Condition Prohibited by Technical Specifications | Safe Shutdown Offsite Circuit |
| 05000269/FIN-2014007-04 | 30 June 2014 23:59:59 | Oconee | Degraded Voltage Relay Scheme | |
| 05000269/LER-2014-001 | 28 March 2014 | Oconee | Unanalyzed condition associated with the 13.8kV emergency power cables located in the underground trench. | Safe Shutdown Unanalyzed Condition |
| 05000275/FIN-2014007-01 | 30 September 2014 23:59:59 | Diablo Canyon | Failure to Document Degraded Emergency Diesel Generator Fuel Injector Nozzles in the Corrective Action Program | |
| 05000275/LER-2007-001 | 12 May 2007 | Emergency Diesel Generator Auto-start on Loss of Offsite 230kV Startup Power | ||
| 05000277/FIN-2014004-01 | 30 September 2014 23:59:59 | Peach Bottom | Corrective Actions Not Timely for EOC of Appendix R Broken Wires | Fire Protection Program |
| 05000282/FIN-2014004-02 | 30 September 2014 23:59:59 | Prairie Island | Failure to have Adequate Procedures to Address Low Bus Voltage Conditions | Significance Determination Process |
| 05000293/LER-2001-006 | Reactor Vessel Water Level | |||
| 05000293/LER-2003-002 | Reactor Vessel Water Level | |||
| 05000293/LER-2003-003 | 1 June 2003 | |||
| 05000293/LER-2003-005 | 6 September 2003 | |||
| 05000293/LER-2008-006 | Pilgrim | Automatic Scram Resulting From Switchyard Breaker Fault During Winter Storm 05000 | Safe Shutdown Reactor Vessel Water Level | |
| 05000321/LER-2010-004 | 3 June 2010 | Hatch | Emergency Diesel Generator lA Excess Fuel Oil Return Tubing Failure | Mission time Anticipated operational occurrence |
| 05000323/LER-2005-002 | 19 November 2005 | Unplanned Emergency Diesel Generator Auto-start During Testing Due to Personnel Error in Relay Testing | ||
| 05000325/LER-2004-003 | 15 August 2004 | Docket Number08 15 2004 2004 -- 003 - 00 10 13 2004 05000 | Operation Prohibited by Technical Specifications due to Inoperable Emergency Diesel Generator | Safe Shutdown Past operability |
| 05000325/LER-2016-002 | 4 March 2016 | Brunswick | Emergency Diesel Generator 3 Inoperable Due to Failure to Auto-Start | Safe Shutdown Time to boil Commercial Grade Dedication Enforcement Discretion Probabilistic Risk Assessment FLEX Offsite Circuit |
| 05000325/LER-2017-002 | 17 April 2017 | Brunswick | Foreign Material in Switch Results in Unplanned Automatic Start of Emergency Diesel Generators | Foreign Material Exclusion |
| 05000331/FIN-2014003-05 | 30 June 2014 23:59:59 | Duane Arnold | Licensee-Identified Violation | Significance Determination Process |
| 05000333/FIN-2008005-03 | 31 December 2008 23:59:59 | FitzPatrick | Licensee-Identified Violation | |
| 05000333/FIN-2009004-02 | 30 September 2009 23:59:59 | FitzPatrick | Licensee-Identified Violation | |
| 05000333/LER-2003-001 | Jamas A, Fitzpatrick Nuclear Power Plant 05000333 1 Of 7 | Automatic Reactor Shutdown Due to Grid Instability Associated With the August 14, 2003 Transmission Grid Blackout and related Plant MODE Change with the A EDG Subs stem Inoperable | Reactor Vessel Water Level Qualified Offsite Circuit Offsite Circuit | |
| 05000333/LER-2005-006 | Iodine | lasperable 115 kV Line in Excess of Technical Specification Allowed Out of Service Time | Probabilistic Risk Assessment Reserve Station Service Transformer Offsite Circuit | |
| 05000333/LER-2016-001 | 23 January 2016 23 March 2016 | FitzPatrick | System Actuations during Manual Scram in Response to Frazil Ice Blockage and Residual Transfer LER 16-001-00 for James A. FitzPatrick Regarding System Actuations during Manual Scram in Response to Frazil Ice Blockage and Residual Transfer | Ultimate heat sink Residual transfer Frazil ice Downpower |
| 05000334/LER-2007-002 | 27 November 2007 | Docket Number | Undetected Loss of 138 kV 'A' Phase to System Station Service Transformer Leads to Condition Prohibited by Plant Technical Specification | Time of Discovery Temporary Modification Qualified Offsite Circuit Offsite Circuit |
| 05000335/FIN-2013004-02 | 30 September 2013 23:59:59 | Saint Lucie | Partial Loss of Offsite Power due to Non-segregated Bus Failure | Significance Determination Process |
| 05000335/LER-1982-037, Forwards LER 82-037/03L-0 | 13 September 1982 | Saint Lucie | Forwards LER 82-037/03L-0 | |
| 05000335/LER-2003-002 | 0 5 0 0 03 3 5 Page 1 of 3 | |||
| 05000335/LER-2004-004 | 25 September 2004 | Dual Unit Loss Of Offsite Power During Hurricance Jeanne | Safe Shutdown | |
| 05000335/LER-2012-001 | 10 February 2012 | Unit 1 Inadvertent Start of EDG upon Unexpected Under Voltage Condition | ||
| 05000336/FIN-2015007-03 | 30 June 2015 23:59:59 | Millstone | Inadequate Evaluation of Circuit Breaker Interrupting Capability | Significance Determination Process |
| 05000336/FIN-2016008-01 | 30 September 2016 23:59:59 | Millstone | Unapproved OMA in Lieu of Meeting III.G.2 Fire Protection Requirements for Fire Area R-14, Lower 4kV Switchgear Room and Cable Vault | Safe Shutdown Operator Manual Action Significance Determination Process Exemption Request Fire Protection Program |
| 05000341/FIN-2012007-03 | 31 March 2012 23:59:59 | Fermi | Failure to Identify EDG\\\'s Neutral Grounding Resistor Exceeded its Design Values | Condition Adverse to Quality |
| 05000352/LER-2013-002 | Limerick | Condition That Could Have Prevented Fulfillment of the Offsite Power Safety Function | Time of Discovery Offsite Circuit | |
| 05000354/FIN-2009007-04 | 31 December 2009 23:59:59 | Hope Creek | Degraded Voltage Protection Scheme Design | |
| 05000354/LER-2001-001 | 8 May 2001 | Docket Number | ||
| 05000362/LER-2002-001 | 27 February 2002 | Docket Number | Significance Determination Process | |
| 05000366/LER-2001-001 | 8 March 2001 | Half scram Temporary Modification | ||
| 05000366/LER-2004-001 | 18 February 2004 | Edwin I. Hatch Nuclear Plant - Unit 2 | 1 OF 5 | |
| 05000366/LER-2016-001 | 13 April 2016 8 June 2016 | Hatch | 2C EDG Fuel Oil Relief Valve Leakage Caused Train Inoperability LER 16-001-00 for E.I. Hatch, Unit 2, Regarding 2C EDG Fuel Oil Relief Valve Leakage Caused Train Inoperability | Time of Discovery Mission time Design basis earthquake |
| 05000368/LER-2017-002 | 26 April 2017 26 June 2017 | Arkansas Nuclear Arkansas Nuclear One – Unit 2 | Automatic Start of an Emergency Diesel Generator Due to the Momentary Loss of Offsite Power due to Severe Weather LER 17-002-00 for Arkansas Nuclear One, Unit 2, Regarding Automatic Start of an Emergency Diesel Generator Due to the Momentary Loss of Offsite Power due to Severe Weather | Safe Shutdown High winds Mission time |
| 05000369/FIN-2018010-01 | 31 March 2018 23:59:59 | Mcguire McGuire | Failure to Update Offsite Circuit Operability Limit for Single Busline Alignment | Offsite Circuit |
| 05000373/LER-2005-001 | 2 February 2005 | Single Failure Vulnerability of Division 1 and 2 Protective Relay Circuitry Due to Latent Design Deficiency | Safe Shutdown Unanalyzed Condition Temporary Modification | |
| 05000373/LER-2013-006 | 13 August 2013 | Inadvertent Automatic Start of the 1A Diesel Generator Cooling Water Pump Due to Improper Adjustment of Mechanically Operated Contact Switch | ||
| 05000374/LER-2003-001 | Nuclear wwwexeloncorp corn Exelon Generation Company, LLC LaSalle County Station 2601 North 21"Road Marseilles, IL 61341-9757 March 11, 2003 10 CFR 50.73 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 LaSalle County Station, Unit 2 Facility Operating License No. NPF-18 NRC Docket No. 50-374 Subject: L Licensee Event Report In accordance with 10 CFR 50.73(a)(2)(iv), Exelon Generation Company, (EGC), LLC, is submitting Licensee Event Report Number 03-001-00, Docket No. 050-374. Should you have any questions concerning this letter, please contact Mr. Glen Kaegi, Regulatory Assurance Manager, at (815) 415-2800. Respectfully, ,i(-e-d-oe-A-- g tz/kia-/e-ta Susan R. Landahl Plant Manager LaSalle County Station Attachments L Licensee Event Report cc: L Regional Administrator - NRC Region III NRC Senior Resident Inspector - LaSalle County Station NRC FORM 366 U.S. NUCLEAR REGULATORY (7-2001) - COMMISSION - - LICENSEE EVENT REPORT (LER) (See reverse for required number of digits/characters for each block) APPROVED BY OMB NO. 3150-0104 EXPIRES 7-31-2004 Estimated burden per response to comply with this mandatory information collection request: 50 hrs. Reported lessons learned are incorporated into the licensing process and fed back to industry. Send comments regarding burden estimate to the Records Management Branch (T-6 E6), U. S. Nuclear Regulatory Commission, Washington, DC 20555-0001, and by Internet e mail to bis I enrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs, NOEB-10202 (3150-0104), Office of Management and Budget, Washington, DC 20503 If a means used to impose information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond o, the information collection I. FACILITY NAME LaSalle County Station, Unit 2 I DOCKET NUMBER 05000374 I PAGE 1 of 3 4.TITLE Manual Scram Due to Lowering Reactor Water Level as a Result of a Trip of the 2B Condensate/Condensate Booster Pump . | |||
| 05000382/FIN-2014008-02 | 30 June 2014 23:59:59 | Waterford | Failure to Identify and Correct Condition Adversely Affecting Flooding Mitigation Design | Condition Adverse to Quality |