What is used to remove large deposits in the bottom of the steam generator, described as a large filtration element for this system?

• A. Steam Generator Blowdown
• B. All Volatile Treatment
• C. Secondary System Impurities
• D. Biofouling

Answer: (A)

The key idea is that deposits and sludge can build up at the bottom of a steam generator, acting like a large filtration element that concentrates impurities. Steam generator blowdown is the controlled removal of a portion of the water from the generator to lower the concentration of dissolved and suspended solids. By continuously or routinely discharging this water, you flush out the accumulated solids from the bottom, preventing hard scaling and excessive sludge buildup. This keeps the internal surfaces cleaner and helps maintain efficient heat transfer and safe operation.

Other concepts describe chemistry management or different problems, not the removal method itself. All Volatile Treatment focuses on adjusting water chemistry to control corrosion and volatility of impurities, rather than physically removing accumulated deposits. Secondary System Impurities refers to the impurities present, not a removal process. Biofouling is microbial growth that can contribute to deposits, not the mechanism used to purge them.