ML19254E226

Press Release Re Discovery of Possibility for Reduced Power Condition When Facility Is in Startup Mode.Util Confirming Study Results & Developing Engineering Mods. Procedures Being Evaluated

ML19254E226
Person / Time
Site:	Yankee Rowe
Issue date:	10/29/1979
From:	YANKEE ATOMIC ELECTRIC CO.
To:
References
PR-791029, NUDOCS 7910310350
Download: ML19254E226 (1)

Text

YkNKEE ITOMIC ELECTRIC COMPANY

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.Ya W h, t

Rowe,Mossachusetts 01367 uxse m

October 29, 1979 PRESS RELEASE Preliminary computer studias have found a reduced voltage condition could exist when Yankee Rowe is in a startup mode of operation (less than 20 per-cent power).

Should this occur, the voltage on the safety related buses could be at reduced levels in the unlikely event of a LOCA. This exists only if the outside voltage is at the minimtmi expected value with all four main coolant pumps in operation. The computer studies do not indicate this condition could exist when the plant is at greater than 20 percent power.

The Company is in the process of confirming these results and arriving at suitable engineering modifications to alleviate the situation.

In :he interim, we are evaluating various procedural changes to assure ade tuate voltage to the safety related buses for the forthconting startup.

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