ML19317F017

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Notifies That on 740105, Facility Experienced Loss of 230 Kv Switchyard.Caused by Ground Loop Signal in Transformer Protection Circuits Tripping Main Breakers.Circuits Removed
ML19317F017
Person / Time
Site: Oconee  Duke Energy icon.png
Issue date: 01/14/1974
From: Peltier I
US ATOMIC ENERGY COMMISSION (AEC)
To: Anthony Giambusso
US ATOMIC ENERGY COMMISSION (AEC)
References
7740114, NUDOCS 8001080721
Download: ML19317F017 (1)


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LWR Rdg RP Rdg JAN 1 4 1g74 RSBoyd DEisenhut RWKlecker Docket Nos.

269 IAPeltier 50-270 EIGoulbourne and 50-287 KGoller KKniel 11 FIASH NOIE TO A. Giambusso WButler OCONEE STATION LOSS OF ITS 230 Kv SWITC11 YARD f its 230 Ky On January 5. 1974, the Oconee Station experienced a loss oThe caus hich affected all switchyard for about an hour.

signal in the station transformer protection circuits wDuke has corrected the I

circuits and tripped out all the main breakers.

(not required for situation by removing the transformer protection circuits During the loss of off-site power the plant syste f

safety).

i as designed.

are any unraviewed safety concerns, 2 was At the time of the switchyard incident Unit I was down a b

l operating.

i ystem When Unit 2 primary pumps were restarted the loose parte conitor ng s l

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detected a very small metalic object about 5/8" in the reactor vesse

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L is reviewing Duke's request for approval to restart L

bottom head.

l Unit 2.

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I. A. Pcitier, Project Manager

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