Feedwater Line Breaks and Emergency Core Cooling System Quiz

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What is the consequence of a feedwater line break inside the containment drywell?

The consequence is the detection of a LOCA condition, which automatically activates the emergency core cooling (ECC) system to spray cooling water into the core for emergency cooldown.

What happens to the reactor water level at the onset of the feedwater line break?

At the onset of the feedwater line break, the reactor water level drops.

What happens to the dome pressure when the steam volume in the dome increases?

The dome pressure decreases slightly.

What is the result of the void fraction in the core increasing slightly?

<p>The reactor power decreases slightly, leading to the yellow cursor on the screen moving downward.</p> Signup and view all the answers

What happens when LOCA is detected after the drywell is pressurized?

<p>The reactor is scrammed by “high drywell pressure/LOCA detected” trip logic, the ECC is activated, FW pumps will be tripped, and the main steam isolation valve will close to isolate the containment.</p> Signup and view all the answers