ML19291C260

Forwards Addl Info Re Loss of Offsite Power,In Response to NRC 790925 Ltr.Includes Sketch of Offsite Power Feeds & ROs 50-219/77-17-3L,50-219/78-03/03L-0,50-219/78-14/3L-0, 50-219/74/17,50-219/78-10/1T-0 & AO 73-19

Date released: 11/01/2019	Download: ML19291C260

RO 50-219/78-10/1T-0:on 780607,during Sys Checkout,Breaker Permissive Switch for Breaker S1B Found in Trip Position. Switching Orders Did Not Specify Placing Permissive Switch Back to Normal After 780221 Trip

ML19291C283
Person / Time
Site:	Oyster Creek
Issue date:	06/23/1978
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
References
Download: ML19291C283 (4)

AO 50-219/74/17:on 740307,during Transfer of Power from Auxiliary to Startup Transformer,Closing Switch for Breaker S1B Would Not Operate.Caused by Component Failure of Closing Spring Not Being in Charged Position

ML19291C282
Person / Time
Site:	Oyster Creek
Issue date:	03/15/1974
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
References
Download: ML19291C282 (3)

RO 50-219/78-14/3L-0:on 780824,during Plant Shutdown,Power Sources for Auxiliary Electrical Power Sys Did Not Meet Reactor Power Operation Requirements,Causing Breakers to Trip.Cause Under Investigation

ML19291C277
Person / Time
Site:	Oyster Creek
Issue date:	09/22/1978
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
References
Download: ML19291C277 (3)

RO 50-219/78-03/3L-0:on 780214,startup Transformer Lockout 865A Alarm Annunciated in Control Room.Caused by Fault in Cable.Cable Standoffs Inspected,Cleaned & Varnished. Evaluation Being Performed on Cable

ML19291C270
Person / Time
Site:	Oyster Creek
Issue date:	03/15/1978
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
References
Download: ML19291C270 (3)

RO 50-219/77-17-3L:on 770728,bus C Lost Power When Breakers 1C & EC Opened Due to Activation of Relays.Cause Unknown. Breaker EC Closed & Megger Readings Retaken.Current Transformers Inspected.Relay Wiring Checked

ML19291C266
Person / Time
Site:	Oyster Creek
Issue date:	08/26/1977
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
References
Download: ML19291C266 (4)

AO 73-19:when Closing Signal Was Applied to Breaker S1A,loss of Power Occurred at 4160-volt Ac Bus 1A Causing Trip of Various Pumps.Caused by Incorrect Setting of Current Transformer Ratio Matching Taps.Taps Set Properly

ML19291C264
Person / Time
Site:	Oyster Creek
Issue date:	09/08/1975
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
References
Download: ML19291C264 (5)

Forwards Addl Info Re Loss of Offsite Power,In Response to NRC 790925 Ltr.Includes Sketch of Offsite Power Feeds & ROs 50-219/77-17-3L,50-219/78-03/03L-0,50-219/78-14/3L-0, 50-219/74/17,50-219/78-10/1T-0 & AO 73-19

ML19291C259
Person / Time
Site:	Oyster Creek
Issue date:	01/18/1980
From:	Finfrock I JERSEY CENTRAL POWER & LIGHT CO.
To:	Office of Nuclear Reactor Regulation
References
Download: ML19291C259 (3)