ML19345A713

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AO 73-2:on 730503,severe Electrical Disturbance Took Place on 69 Kv Transmission Line Actuating Low Main Coolant Flow Undercurrent Relays,Resulting in Scram.Following Survey of Sys,Reactor Taken Critical & Returned to Power
ML19345A713
Person / Time
Site: Yankee Rowe
Issue date: 05/14/1973
From: Autio H
YANKEE ATOMIC ELECTRIC CO.
To:
US ATOMIC ENERGY COMMISSION (AEC)
References
AO-73-2, NUDOCS 8011250023
Download: ML19345A713 (2)


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Reference:

License No. DPR-3 (Docket No. 50-29)

Dear Sirs:

Pursuant to'the requirements of Section 5.7 of the Technical-Specifications submitted as Proposed Change No. 105 we hereby report the following abnormal occurrence, designated A.O. No. 73-2.

On May 3,1975 at 0838 hours0.0097 days <br />0.233 hours <br />0.00139 weeks <br />3.18859e-4 months <br /> a severe electrical disturbance took place on a 69 kV transmission line of the New England Power Company. This line operation actuated the plant low main coolant flow under-current relays of the main coolant pump motors for 'locps No. 2 and No. 3 resulting in a reactor scram and turbine generator trip from 575 mkt.

Following a survey of plant equipment and systems, which indica ed no adverse or unsafe condition, the reactor was taken critical and the plant returned to power.

Very truly yours, 0140 4 H. A. Autio Plant Superintendent ilAA

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