What action does the MFP system take to manage hydrazine levels?

The correct answer addresses the specific action within the Main Feed Water Pump (MFP) system that is designed to manage hydrazine levels effectively. Establishing flow through one polisher allows the system to treat the feedwater, ensuring that it meets quality standards for preventing corrosion and other issues associated with the chemical makeup of the feedwater.

In this context, the polisher is a type of filtration system that can remove impurities, including dissolved gases like hydrazine, which is sometimes used as an oxygen scavenger in boiler water treatment. By directing the flow through one polisher, the system effectively utilizes its filtration capabilities to maintain the desired hydrazine concentration.

This targeted approach is crucial because maintaining appropriate hydrazine levels is essential for protecting the integrity of the boiler system and optimizing performance while minimizing the risk of corrosion.

The other options, while related to the broader aspects of feedwater management, do not directly address how hydrazine levels are regulated within the context of the MFP system. Increasing water circulation and utilizing secondary filters may have some impact on feedwater quality, but they do not specifically control hydrazine levels. Additionally, incorporating chemical agents pertains to a more general treatment strategy rather than a specific action within the system itself for this