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 Issue dateTitleTopic
05000483/LER-2023-001, Submittal of LER 2023-001-00 for Callaway, Unit 1, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications29 November 2023Submittal of LER 2023-001-00 for Callaway, Unit 1, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications
05000458/LER-2017-00913 November 2017Potential Loss of Safety Function of Secondary Containment due to Unsecured Personnel Door
LER 17-009-00 for River Bend, Unit 1 Regarding Potential Loss of Safety Function of Secondary Containment due to Unsecured Personnel Door
ULNRC-06398, Special Report 2017-02: Non-Functional Seismic Instrument for Greater than 30 Days8 November 2017Special Report 2017-02: Non-Functional Seismic Instrument for Greater than 30 Days
05000483/LER-2017-00213 October 2017Inadequate Protection from Tornado Missiles Identified Due to Nonconforming Design
LER 17-002-00 for Callaway Plant, Unit 1, Regarding Inadequate Protection from Tornado Missiles Identified Due to Nonconforming Design
Safe Shutdown
Unanalyzed Condition
Tornado Missile
Enforcement Discretion
FLEX
Tornado-Generated Missile
Tornado Missile Protection
Tornado Missile Risk Evaluator
Earthquake
05000483/LER-2017-00115 August 2017Violation of Technical Specification 3.7.9 Due to Ultimate Heat Sink (UHS) Cooling Tower Train Inoperability
LER 17-001-00 for Callaway, Unit 1, Regarding Violation of Technical Specification 3.7.9 Due to Ultimate Heat Sink (UHS) Cooling Tower Train Inoperability
Safe Shutdown
Ultimate heat sink
Mission time
05000286/LER-2017-0029 August 2017Manual Isolation of Chemical and Volume Control System Normal Letdown to Stop a Valve Leak Resulted in an Exceedance of Technical Specification 3.4.9 Condition A Limit for Pressurizer Level
LER 17-002-00 for Indian Point, Unit 3 re Manual Isolation of Chemical and Volume Control System Normal letdown to Stop a Valve Leak Resulted in an Exceedance of Technical Specification 3.4.9 Condition A Limit for Pressurizer Level
Safe Shutdown
05000483/LER-2015-0012 December 2016Completion of a Shutdown Required by the Technical Specifications - TS 3.4.13
LER 15-001-01 for Callaway Plant, Unit 1, Regarding Completion of a Shutdown Required by the Technical Specifications - TS 3.4.13
Probabilistic Risk Assessment
Pressure Boundary Leakage
05000483/LER-2015-0027 September 2016Manual Auxiliary Feedwater System Actuation
LER 15-002-00 for Callaway, Unit 1, Regarding Manual Auxiliary Feedwater System Actuation
05000336/LER-2016-00127 June 2016Turbine Driven Auxiliary Feedwater Putnp Room HELB Door Left Open
LER 16-001-00 for Millstone Power Station Unit 2 RE: Turbine Driven Auxiliary Feedwater Pump Room HELB Door Left Open
05000483/LER-2016-00120 June 2016Control Room Air Conditioning Inoperability Due To Essential Service Water Pressure Transient
LER 16-001-00 for Callaway, Unit 1, Regarding Control Room Air Conditioning Inoperability Due to Essential Service Water Pressure Transient
Safe Shutdown
Unanalyzed Condition
Mission time
05000423/LER-2016-0038 June 2016Loss of Safety Function- Supplementary Leak Collection and Release System
LER 16-003-00 for Millstone Power Station, Unit 3, Regarding Loss of Safety Function-Supplementary Leak Collection and Release System
05000483/LER-2015-00321 January 2016Reactor Trip Caused by Transmission Line Fault
LER 15-003-01 for Callaway, Unit 1, Regarding Reactor Trip Caused by Transmission Line Fault
ULNRC-06162, Special Report 2014-05 Inoperability of Loose Parts Monitoring Instrument for Greater than 30 Day11 December 2014Special Report 2014-05 Inoperability of Loose Parts Monitoring Instrument for Greater than 30 Day
ULNRC-06142, SR-14-002 Callaway, Unit 1 - Special Report 2014-02-PAM Report Inoperability of Post Accident Monitoring (PAM) Instrument16 September 2014SR-14-002 Callaway, Unit 1 - Special Report 2014-02-PAM Report Inoperability of Post Accident Monitoring (PAM) InstrumentPost Accident Monitoring
ULNRC-05991, Special Report 13-001-00 for Callaway, Unit 1, Inoperability of a Seismic Instrument for Greater than 30 Days13 May 2013Special Report 13-001-00 for Callaway, Unit 1, Inoperability of a Seismic Instrument for Greater than 30 Days
ULNRC-05932, Special Report 2012-02 - Pam Report: Inoperability of a Post Accident Monitoring (PAM) Instrument for Greater than 30 Days14 November 2012Special Report 2012-02 - Pam Report: Inoperability of a Post Accident Monitoring (PAM) Instrument for Greater than 30 DaysPost Accident Monitoring
ULNRC-05824, Special Report 2011-01 for Callway, Unit 1 Regarding Inoperability of a Seismic Instrument for Greater than 30 Days10 November 2011Special Report 2011-01 for Callway, Unit 1 Regarding Inoperability of a Seismic Instrument for Greater than 30 Days
ULNRC-05721, Special Report, Inoperable Channel 8 of the Loose Parts Monitoring System (Lpms)22 July 2010Special Report, Inoperable Channel 8 of the Loose Parts Monitoring System (Lpms)
ULNRC-05374, Special Report 07-001 Re Historical Inoperability of Seismic Instrument SGAR00088 March 2007Special Report 07-001 Re Historical Inoperability of Seismic Instrument SGAR0008
ML0413203793 May 2004Special Report for Callaway Plant Unit 1 Regarding Inoperability of 60 Meter Meteorological Monitoring Instrumentation on the Primary Meteorological TowerTime of Discovery
Met Tower