Things came to a head in March 2003, when a critical piece of safety equipment, a turbine bypass valve, jammed open in the Hope Creek reactor.
12.
Before entering the machines there are Sluice Valves with provision for 3 " bypass valve to reduce the pressure at the time of opening the main valve.
13.
The first method is to use a throttle air bypass; this may be an external bypass valve or a solenoid valve which opens the throttle 12-20 degrees.
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These bypass valves will automatically or manually modulate as necessary to maintain reactor pressure and control the reactor's heatup and cooldown rates while steaming is still in progress.
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Subsequent design changes implemented an oil cooler bypass valve to eliminate what were seen to be the most likely sources of leakage, the cooler and external lines and fittings.
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The air is usually recycled back into the turbocharger inlet ( diverter or bypass valves ), but can also be vented to the atmosphere ( blow off valve ).
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The bypass valve and bypass path can be internal ( an integral part of the pump or compressor ) or external ( installed as a component in the fluid path ).
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Additional functions of the ECM include operation of the fuel pump by closing the Ground for the fuel pump relay, and control of idle speed by a throttle plate bypass valve.
19.
The two inboard shafts were driven by the high pressure ahead and astern turbines with the ahead turbines having an extra stage for cruising; this was separated from the main turbine by a bypass valve.
20.
The Idle Air Control Valve ( IACV ) ( previously known as an Idle Air Stabiliser Valve-IASV ), receives a changing milliamp signal that varies the strength of an electromagnet pulling open the bypass valve.
