05000272/LER-1979-004-03, During Normal Operations, Status Alarm Panel Indicated Loop 1 Steam Pressure 100 Psi Less than Loop 4.Steam Pressure Channels Checked & Loop 4 Channel 4 Read 100 Psi High.Caused by Frozen Sensing Line

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• 05000272/LER-1979-004-03, /03L-0 on 790103:Loop 4 Channel IV Was 100 Psi Too High.Caused by Steam Pressure Transmitter Being Frozen by an Outside Air Damper Directing Cold Air Onto the Sensing Lines