At 9:40 a.m., the plant operators declared a site area emergency (SAE) per existing procedures which called for an SAE whenever "vital" power is lost for more than 15 minutes.
The electrical fault described above also affected unit 2 by causing breakers in the 230kv switchyard to trip cutting off power to RAT 2-B and vital bus B on unit 2. EDG 2-B subsequently started and restored power to the vital bus.