Containment Ventilation Flashcards
What are the Phase “A” trips for Ctmnt Ventilation?
- CPS/CPX valves close
- CIPS/CIPX valves close
- CPR valves close
- CUV Fans
- CIR Fans
What trips on a Phase “B” signal for Ctmnt Ventilation?
- CLVs (ENV qual)
- CRDM Fans (ENV qual)
- Pressurizer Fans
- Reactor Cavity Fans
What trips on a CVI signal for Ctmnt Ventilation?
- CPS/CPX Fans and valves
- CIPS/CIPX Fans and valves
- CPR Fan and valves
What does the CIV Train A isolate/trip?
- CIV Train A closes Inside Ctmnt valves plus Trips CIPS fan
What does the CIV Train B isolate/trip?
- CIV Train B closes Outside Ctmnt valves plus trips all other fans
What Ctmnt Ventilation trips on a Load Conservation?
- CUVs Fans
- CIRs Fans
- CPRs Fan
- Pzr Fan
- Rx Cavity Fans
- Hot Sleeve Fans
What Ctmnt Ventilation doesn’t trip on a Load Conservation?
- CLVs (Lower Ctmnt #)
- CRDM fans (Nat Circ cooldown)
What happens with Ctmnt Ventilation when a 1# in lower ctmnt signal is received?
- CEQ fan Cooling Valves Open
- U1 CEQ Fan starts on 283 sec time delay
(Fan suction valves open on fan start) - U2 CEQ Fan starts on 2 min time delay
(Fan suction valves open on fan start)
How will VDC-207 fail on a loss of ctrl air?
- open
What starts/opens on a 1# in Ctmnt signal?
- CEQ fans start and suction valves open on the start
What do you use to reduce pressure in ctmnt if # > 0.3# ?
- CPR (norm)
- CPS/CPX
What will give you a Containment Vent Isolation?
- High Rad in Upper or Lower Ctmnt
- SI
- Manual Phase A
- Manual SI
- Manual Phase B/CVI
Which Cntmt Rad Monitors will give a Train “A” CVI?
Train A – 1101 and 1301/1305
Which Cntmt Rad Monitors will give a Train “B”CVI?
Train B – 1201 and 1401/1405
What Ctmnt Ventilation will trip on a charcoal filter fire?
- CIPX Fan
- CPR Fan
(Both will restart once temp is < 400°F)
What is your CEQ fan trying to maintain while its running?
< 4% Hydrogen atmosphere in Ctmnt
What are the places where the CEQ fans take a suction?
- SG enclosures
- Pzr Enclosure
- CLV fan rooms
- IR
- Upper Cntmt Dome
- Lower Ctmnt general area
Which ONE of the following does NOT need to be realigned following a Phase A ctmnt isolation signal reset?
A. Control air to containment.
B. Containment upper ventilation fans.
C. RCP seal return.
D. Cooling water to reactor supports.
- B. CUVs
What provides power to CEQ fans?
EZC-B (Train B)
EZC-C (Train A)
Where does the CEQ fan exhaust to?
- Lower Vent unit fan area
During normal plant operation, control air to Containment Pressure Relief Inlet Volume Damper, VDC-207, is lost due to a small leak at the air valve.
How is Containment Pressure Relief System operation affected? (ASSUME the leak does NOT result in a loss of control air to any other component or system).
A. The system is inoperable as the damper fails closed.
B. The system can be operated at full flow as the damper fails open.
C. The system can only be operated at the flow that existed at the time of the failure as the damper fails as is.
D. No effect, the damper has a full capacity bypass line.
- B. The system can be operated at full flow as the damper fails open.
Unit 2 is operating at 100% power. A small instrument air leak inside Containment causes a slow rise in Containment pressure. Containment pressure is currently 0.29 psig. In order to ensure that adequate margin to Containment Technical Specification pressure limits is maintained, which ONE of the following indicates the appropriate action to reduce Containment pressure?
A. Maximize NESW cooling to the Containment Ventilation Units
B. The Containment should be vented using the Containment Purge System.
C. The Containment should be vented using the Containment Pressure Relief system.
D. All Upper/Lower Containment Ventilation Fans (CUV/CLV) should be started or verified running.
- C. The Containment should be vented using the Containment Pressure Relief system.
Which Ctmnt Vent Fan has the only electric heater that is outside ctmnt?
- CIPS Fan
