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Unit 1 Unit 4 dB reading: 36 decibels 60 decibels Sensitivity value: 40 40 Frequency: 40 kHZ 40 kHZ Fgfg Comment: 1) Unit 3 FRP seal header with crack opening exhibits relatively higher dB readings than Unit 1 (no defect). 2) This header defect is one evident that cause the unit 4 derated condenser vacuum. 3) To avoid a forced outage, a scheduled repair must be made after completing the necessary preparation.

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Predictive approach to avoid a force outage.

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  • Unit 1 Unit 4

    dB reading: 36 decibels 60 decibels

    Sensitivity value: 40 40

    Frequency: 40 kHZ 40 kHZ

    Fgfg

    Comment: 1) Unit 3 FRP seal header with crack opening exhibits relatively higher dB readings than Unit 1 (no defect). 2) This header defect is one evident that cause the unit 4 derated condenser vacuum. 3) To avoid a forced outage, a scheduled repair must be made after completing the necessary preparation.