RQ-I-4811 (Aux Building & Control Room Ventilation)

Question 1

How do we maintain the Auxiliary Building at a slightly negative pressure?

Answer 1

Auxiliary ventilation exhaust systems are of greater capacity than supply systems, thus maintaining the entire Auxiliary Building at a slightly negative pressure.

Question 2

What is the status of Control Room Air Conditioning if we lose all ESW to CRAC?

Answer 2

With no ESW to the cooling coils or the chiller condenser, the CRAC is INOPERABLE.

Question 3

What causes AFX to trip?

Answer 3

• Load Conservation
• Charcoal Bed Fire
• Overload
• Manual