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Risk-Informed Approach to Penstock Safety - Pat Regan

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� Vacuum<br />

Equipment Malfunction<br />

� Air valve failure<br />

� Debris plugging air vents<br />

� Icing of air vents<br />

� Mis-operation<br />

� Water Hammer<br />

� Governor failure / wear<br />

� Wicket gate failure<br />

� Pel<strong>to</strong>n needle failure<br />

� Mis-operation

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