Aux Building filter exhaust fan is running. What condition will cause it to trip?
low inlet plenum pressure
In order to preclude an unplanned radioactive release, the various reactor plant ventilation systems maintain a negative pressure in their service areas.
Which of the following is the proper setup sequence in support of this purpose?
open the supply/exhaust dampers, start the exhaust fan, start the supply fan
Moisture separators and electric preheat coils are installed as part of certain components in the various reactor plant ventilation systems.
Which of the following purposes of the ventilation systems do these instillations support?
filter air before releasing it to the atmosphere if it contains high particulate activity
A purge of the north electrical tunnel is in progress. What is the normal discharge path of this purge?
fan 3HVR-FN11 discharges through 3HVR*AOD85/86 to the planet ventilation vent on the turbine building roof
What is the normal fan configuration for the aux building general area ventilation system?
exhaust fans 3HVR-FN5/FN7 and supply units 3HVR-HVU2A/2B running
AB exhaust fan 3HVR-FN5 primarily draws air from which location?
upper level AB
The supplemental leak collection and release system draws air from all of the following areas except:
waste disposal building
What will be the status of:
3HVR-AOD36A (sample hood outlet damper)
AOD99A (exhaust fan outlet damper)
AOD36B (sample room normal outlet damper)
AOD99B (sample room exhaust fan bypass damper)
be with the control switch for 3HVR-FN15 in the “NORMAL” position?
99A and 36A CLOSED
99B and 36B OPEN
What will be the status of:
3HVR-AOD36A (sample hood outlet damper)
AOD99A (exhaust fan outlet damper)
AOD36B (sample room normal outlet damper)
AOD99B (sample room exhaust fan bypass damper)
be with the control switch for 3HVR-FN15 in the “SAMPLE HOOD” position?
99A and 36A OPEN
99B and 36B closed to a minimum open position
Plant is at 100%. SIS received.
How will the SLCRS system respond to the SI signal?
both fans start after their respective filter inlet isolation dampers stroke fully open
AB exhaust fan 3HVR-FN7 primarily draws air from what location?
AB lower level
Where does AB exhaust fan 3HVR-FN13A primarily draw air from?
charging pump cubicles and CCP pump area
Where does AB exhaust fan 3HVR-FN11 primarily draw air from?
north and south electrical tunnels
Why is there a difference in the total flow capacity of the AB supply fans 3HVR-HVU2A/2B and AB exhaust fans 3HVR-FN5/FN7?
maintains the AB at a slight negative pressure
