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 Issue dateTitleTopic
05000423/LER-2019-00113 February 2020LER 2019-001-00 for Millstone Power Station Unit 3 Regarding Plant Shutdown Required by Technical Specifications, Emergency Diesel Generator Exceeded Allowed Outage Time
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
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
05000423/LER-2017-00120 March 2017Loss of Safety Function - Secondary Containment
LER 17-001-00 for Millstone, Unit 3 Regarding Loss of Safety Function - Secondary Containment
05000336/LER-2016-00220 September 2016Manual Reactor Trip Due to Loss of Two Circulating Water Pumps
LER 16-002-00 for Millstone Power Station Unit 2 Regarding Manual Reactor Trip Due Loss Of Two Circulating Water Pumps
05000423/LER-2016-0059 August 2016Technical Specification Required Shutdown and Manual Reactor Trip Due to Steam Generator Level Oscillation
LER 16-005-00 for Millstone Power Station Unit 3 RE: Technical Specification Required Shutdown and Manual Reactor Trip Due to Steam Generator Level Oscillation
Pressure Boundary Leakage
Power change
05000423/LER-2016-00413 July 2016Manual Reactor Trip Due to Low Hydrogen Gas Pressure In Main Generator
LER 16-004-00 for Millstone Power Station Unit 3 RE: Manual Reactor Trip Due to Low Hydrogen Gas Pressure In Main Generator
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
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
05000423/LER-2016-00223 March 2016Feedwater Isolation Signal Defeated Due to Wiring Error
LER 16-002-00 for Millstone Power Station Unit 3 Regarding Feedwater Isolation Signal Defeated Due to Wiring Error
05000423/LER-2016-00116 March 2016Automatic Reactor Trip on Reactor Coolant System Low Flow Due to Loss of 'B' Reactor Coolant Pump
LER 16-001-00 for Millstone Power Station Unit 3, Regarding Automatic Reactor Trip on Reactor Coolant System Low Flow Due to Loss of 'B' Reactor Coolant Pump
Coast down
05000336/LER-2015-0037 January 2016Valid Actuation of the Reactor Protection System
LER 15-003-00 for Millstone, Unit 2, Regarding Valid Actuation of the Reactor Protection System
Downpower
ML0925900558 September 2009Special Report for Seismic Instrumentation
ML07193028111 April 2007Final ASP Analysis- Millstone (LER 336/06-002)Reserve Station Service Transformer
ML0622802408 August 2006Special Report for Inoperable Radiation Monitor