Hydro Plant Risk Assessment Guide
Hydro Plant Risk Assessment Guide
Hydro Plant Risk Assessment Guide
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Table 32 – Actuation Performance<br />
Results<br />
Acceptable – Gate or valve actuates from fully open to fully closed<br />
in the required timeframe. (Takes < 2 minutes for valves and < 10<br />
minutes for gates if requirement is not known.)<br />
Unacceptable – Gate or valve does not actuate from fully open to<br />
fully closed in the required timeframe. (Takes ≥ 2 minutes for<br />
valves and ≥ 10 minutes for gates if requirement is not known.)<br />
Performance based on some deficiency of the electric-powered<br />
gate or valve operator.<br />
Adjustment to<br />
Condition Index Score<br />
No Change<br />
Subtract 1.0<br />
Test T2.3.11: Electrical Operators – Electric Controls<br />
Table 33 – Electric Controls<br />
Results<br />
Good – Control wiring is clean, with no excessive soil, fatigue, or<br />
wear apparent on insulation or jacket material. Wiring is securely<br />
connected to devices, or is loosely connected but can be corrected<br />
without spare parts or special tools. Control devices (pushbuttons,<br />
contactors, switches, coils) are clean and function as designed.<br />
Control enclosures are clean, with no excessive soil, corrosion, or<br />
physical damage.<br />
Fair – Control wiring, enclosures, and devices are clean and in good<br />
overall condition, but spare parts are no longer available. Wiring<br />
insulation or jacket is polyvinyl chloride (PVC) compound.<br />
Moderate – Control wiring has minor wear, fatigue, or soil apparent<br />
on insulation or jacket material. Some control wiring appears<br />
loosely connected to devices, and cannot be corrected, or cannot be<br />
corrected without spare parts or special tools. Control devices<br />
(pushbuttons, contactors, switches, coils) are not clean or do not<br />
function as designed. Control enclosures have some soil, corrosion,<br />
or physical damage.<br />
Severe – Control wiring has wear, fatigue, or soil apparent on<br />
insulation or jacket material. Control wiring has become<br />
disconnected from corresponding devices, and cannot be corrected.<br />
Control devices (pushbuttons, contactors, switches, coils) do not<br />
function. Control enclosures have excessive soil, corrosion, or<br />
physical damage.<br />
Adjustment to<br />
Condition Index Score<br />
No Change<br />
Subtract 0.25<br />
Subtract 0.5<br />
Subtract 1.0<br />
E11-29
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