What is the purpose of the hydrogen recombiner building ventilation system?
maintain equipment operability, support personnel access, and support recombiner operation during post-LOCA conditions
What will cause the hydrogen recombiner cubicle inlet damper to auto close?
high rad alarm on 3HVZ*RE09A
Which of the following describes the normal (standby) arrangement of the hydrogen recombiner?
all system isolation valves closed, and are manually opened when recombiner operation is required
What will cause the B hydrogen recombiner positive displacement blower to auto stop?
either HVZMOD20B or 3HVZMOD21B not fully open
When the H2 recombiner equipment room temp reaches its set point of 80 F, which of the following actions occurs?
the equipment room ventilation inlet and outlet dampers OPEN and the equipment room exhaust fan STARTS
With the “A” hydrogen recombiner running, the air blast HX fan breaker trips. Return gas temperature is increasing.
Which of the following directly occurs as a result of return gas temperature exceeding 141F?
the radiant heater breaker trips
How are the hydrogen recombiner containment isolation valves operated when using the installed reach rods?
keep the hand wheel pulled out while operating the valve so that the clutch is not overridden
What is the maximum flow rate measurement through a hydrogen recombiner that will ensure adequate equipment protection and performance?
7.5” H20
What method is used to maintain the hydrogen recombines in pre-warmed state, ready for start up?
the power supply for the radiant heaters is manually switched from 480 VAC to 120 VAC to provide trickle heat to the reaction chamber
What area(s) of the hydrogen recombiner building are served by the recombiner building air conditioning unit?
the lower level control room area of the recombiner building EXCLUDING the recombiner rooms
