In a PWR, what is the primary function of the hot-leg?

In a PWR, what is the primary function of the hot-leg?

• A. From steam generators to reactor
• B. From reactor to steam generators
• C. Circulates within the steam generator
• D. Pressure relief to atmosphere

Answer: (B)

In a PWR the hot-leg is the high-temperature, high-pressure path that carries the primary coolant from the reactor vessel toward the steam generators. Its main function is to transport heat away from the reactor core so the steam generators can transfer that heat to the secondary side and produce steam for the turbine. The coolant stays in the closed primary loop under enough pressure to stay liquid while heat is removed in the steam generators, and then it returns to the reactor through the cold-leg to be reheated. So the question’s correct idea is that the hot-leg moves heat from the reactor to the steam generators, not the other way around, not circulating inside the steam generator, and not releasing pressure to the atmosphere.

In a PWR the hot-leg is the high-temperature, high-pressure path that carries the primary coolant from the reactor vessel toward the steam generators. Its main function is to transport heat away from the reactor core so the steam generators can transfer that heat to the secondary side and produce steam for the turbine. The coolant stays in the closed primary loop under enough pressure to stay liquid while heat is removed in the steam generators, and then it returns to the reactor through the cold-leg to be reheated. So the question’s correct idea is that the hot-leg moves heat from the reactor to the steam generators, not the other way around, not circulating inside the steam generator, and not releasing pressure to the atmosphere.