Which valves are used for regulating flow during full power conditions?

The correct answer is the Main FeedWater Reg Valves. These valves play a crucial role in regulating the flow of feedwater to the steam generator or boiler during full power operations. Their primary function is to maintain the desired pressure and flow rate, ensuring optimal thermal efficiency and stability of the system under high-load conditions.

Main FeedWater Reg Valves are designed to provide precise control of feedwater flow, enabling the system to respond effectively to varying demands and operational parameters. This regulation is essential for maintaining steam quality and supporting continuous power generation.

In contrast, while the Control Valves may also impact flow, they are often associated with fine-tuning operations rather than the primary regulation of feedwater under full power. Isolation Valves are primarily used to stop or divert flow during maintenance or emergency situations, and Main FeedWater Reg Bypass Valves serve more in a supporting role, allowing for flow diversion when needed, rather than directly regulating the main feedwater supply during normal operations.