Which type of leakage is associated with the main concern of releasing radioactive materials, requiring quick detection, and is addressed in the TS documents?

• A. Secondary System Impurities
• B. PWR primary to secondary leakage
• C. All Volatile Treatment
• D. Biofouling

Answer: (B)

The situation hinges on a leakage path that can carry radioactive material from the reactor coolant into another part of the plant, so it must be detected quickly. In a PWR, the primary coolant becomes radioactive through activation products, and leakage into the secondary system can transfer that radioactivity into steam and the turbine, or even to the surroundings if not controlled. Technical Specifications specifically address this primary-to-secondary leakage, setting limits and requiring rapid detection and action to isolate the leak and protect the public and plant equipment. The other choices don’t describe a leak path that would release radioactivity: secondary system impurities refer to non-radioactive contaminants in the secondary loop; all volatile treatment is a chemistry control program for water chemistry; and biofouling is biological buildup on surfaces. So the leak type that aligns with the concern of releasing radioactive materials and needing quick detection is the primary-to-secondary leakage.