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Category:Licensee Event Report (LER)
MONTHYEAR05000277/LER-2024-003, (Pbaps), Unit 2, Automatic Reactor Scram Following Main Turbine Trip Due to Degraded Condenser Vacuum2024-09-0505 September 2024
(Pbaps), Unit 2, Automatic Reactor Scram Following Main Turbine Trip Due to Degraded Condenser Vacuum
ML24099A0012024-04-0808 April 2024
(PBAPS) Units 2 and 3, Uncoordinated DC Circuits Cause Unanalyzed Condition
ML24081A1212024-03-21021 March 2024
Automatic Reactor Scram Due to an Invalid Generator Lockout
ML21196A4852021-07-16016 July 2021
LER 2-2021-002-00 for Peach Bottom Atomic Power Station, Unit 2, Safety Relief Valve Inoperability Due to Nitrogen Leakage from Braided Hose Wear
05000278/LER-2017-0012017-12-20020 December 2017
Reactor Pressure Boundary Leakage Due to Weld Failure in One-Inch Diameter Instrument Line, LER 17-001-00 for Peach Bottom Atomic Power Station (PBAPS), Unit 3 Regarding Reactor Pressure Boundary Leakage Due to Weld Failure in One-Inch Diameter Instrument Line
05000277/LER-2017-0012017-03-0808 March 2017
Emergency Diesel Generator Exhaust Stacks Nonconforming Design for Tornado Missile Protection, LER 17-001-00 for Peach Bottom Atomic Power Station (PBAPS), Unit 2 Regarding Emergency Diesel Generator Exhaust Stacks Nonconforming Design for Tornado Missile Protection
05000278/LER-2016-0012016-11-22022 November 2016
Leak in High Pressure Coolant Injection Drain Pipe Results in a Loss of Safety Function, LER 16-001-00 for Peach Bottom, Unit 3, Regarding Leak in High Pressure Coolant Injection Drain Pipe Results in a Loss of Safety Function
05000277/LER-2016-0012016-11-11011 November 2016
Leak in High Pressure Service Water Pipe Results in Condition Prohibited by Technical Specifications, LER 16-001-00 for Peach Bottom, Unit 2, Regarding Leak in High Pressure Service Water Pipe Results in Condition Prohibited by Technical Specifications
05000278/LER-2015-0012016-02-26026 February 2016
Loss of High Pressure Coolant Injection System Function as a Result of Failed Flow Controller Signal Converter, LER 15-001-00 for Peach Bottom, Unit 3, Regarding Loss of High Pressure Coolant Injection System Function as a Result of Failed Flow Controller Signal Converter
ML13058A0432013-02-22022 February 2013
Submittal of Independent Spent Fuel Storage Installation (ISFSI) Cask Event Report
ML1007702362010-03-12012 March 2010
60-Day Security Event Report 2-10-S01
ML0927401622009-09-30030 September 2009
LER 09-S01-00 for Peach Bottom, Units 2 & 3 Regarding Unescorted Access Granted to Contract Worker Who Did Not Provide Complete Work History Information
ML1015505682009-07-10010 July 2009
Event Notification for Peach Bottom on Elevated Tritium Levels Found in On-Site Well
ML0434503772004-12-10010 December 2004
LER-04-S01-00 for Peach Bottom Atomic Power Station (PBAPS) Unit 2 and Unit 3, 60 Day Security Event Report 2-04-S01
ML19095A7391976-12-0505 December 1976
Reporting Abnormal Occurrence No. 50-278-74-33 at Peach Bottom Atomic Power Station for Failure of Main Steam Line High Flow Switch dPIS-3-2-116C to Trip During Surveillance Test
2024-09-05
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Text
- PHILADELPHIA ELECTRIC COHPANY f"G...13:Pil ~ 3
~
4l""t R PtMc_-ottom Atomic iower Station 0
£A) A'-1'"_ St'Hl~J~*-~(,J
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-';w-..-Jmn.06--Y-...---0.!~.U..y.,-O~lii!.4::tor .
Vnited States Atomic Energy Cornmiasion Di~~ctorate of R~gulato~y Operations 631 Park Aveou~
King of Pruasi~, Ponn5ylvania 19406
Subject:
\Abno'i'."m.at 01:curr-en~e 24-Hour Notification Confirming,Vo T. Ullrich'a phone conversation -with Mro Walt llirnnack 11 AoE.C. Region!
Regulatory OpeTation~ Office on December 5 11 1974.
Ref ere nee: . License Number DPR-56
~echnical Specification
Reference:
Table J.2.A Rep-ort Jfo.: 50-278-74-33 Report D.llte: DmcCl!mber S>> 1974 Occu~r~nce Date: December 4. 197~
Facility: Pti!.ach Bottom Ato~ic Pover Station Deltap P~nnaylvan~a 17314 Identification of Occurrencet Failure of Main Steam .Linm High Flot.1 SY!tch dPIS-J-2-116C to tri'E) du.:ing ,!&
aurveillance test.
Conditions Prior to Occur~enee:
Unit 3 at appro~im.at~ly 75% ~ r .
Description of Occurrenc:
Du~in.g ~ routine surv~illanca test, dPIS-3-2-ll6C f&iled to trip.
Designation of Apparent Cau@e of Occurrence:
Probably a slight rnecrumical binding. The bind*ing clea.i"ed during visu.ml examiru.t~on ot tho svitch linkageo Anslysis of Occur:reru:e:
Thmr are no s.af~ty implications since ite com-panion ITTri.tch in a one-of-th~-
tu.ice logic w.s operabl~ and voul.d havia cripped at the prescribed setpointa Corr~tiv~ Actiofi:
Folloving the failure to t~ipp th~ face and scale WC!J!re r!ZrnlOv~d from the instrum~nt in order to ~acch the linkage during an operation to tLy to determine the type of f allure. The St:titch was again tested and 11;hia eim~ ar-..d each ~mcceediog time it
\rorked proper1y~ le tr.a~ ch2n reasse~bled>> tested and continued to vork succecsfull:
Failure Datn:
Previous occurrences on thee~ type m:ritches h.~ve been ~eported as dPtS-2-2-1190 o~ 9/7/7lt S0-277-74-28, 50-277-74-48 5 and 50-278-74-20.
Very truly!yours.
-~(;~~
U. T. Ullrich. Supe~intand~at Pasch.Sott~ Atomic Po-d~r Station
