Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Catawba Nuclear Station > Auxiliary Building Ventialation(VA) > Flashcards

Auxiliary Building Ventialation(VA) Flashcards

1
Q

What is the purpose of the Auxiliary Building Ventilation System?

A
  1. Provide a suitable working environment for personnel and equipment. Air exhausted from contaminated and potentially contaminated areas is monitored for radiation and filtered as required prior to release
  2. During accident conditions, Auxiliary Building Ventilation aligns to assure that the ECCS pump rooms are maintained at a negative pressure and air exhausted form these rooms is filtered prior to being released
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How is flow balanced in the system to prevent the spread of contamination?

A

System flow is balanced to always have the flow from non-contaminated areas to contaminated ares, and then out via the exhaust fans

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the Auxiliary Building Ventilation normal temperature range?

A

40F - 110F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What systems assist in maintaining temperature in the Auxiliary Building Ventilation System?

A
  1. Heating is provided by the Building Heating System(YH) whenever outside air temp is less than or equal to 50F and when AHU intake is less than or equal to 40F
  2. Cooling water is provided by the Containment Chilled Water System(YV), and is supplied to control temperature at 60F
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the capacity and power supply to the Auxiliary Building Ventilation System Supply Units?

A
  1. Two 50% capacity supply units
  2. Power supplies:
    A. MXW
    B. MXX
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What will cause an Auxiliary Building Ventilation Supply Unit to automatically start?

A

With its control switch in “AUTO”, each supply automatically starts as its associated unfiltered exhaust fan starts with a 1 minute TD to allow dampers to reposition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What will cause an Auxiliary Building Ventilation Supply unit to trip automatically?

A
  1. Associated Unfiltered exhaust fan shutdown
  2. Motor overload
  3. Smoke detectors on the outlet of the AHU(trips both supply fans)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the capacity and power supply to the Auxiliary Building Ventilation System Unfiltered Exhaust Fans?

A
  1. Two, 50% capacity exhaust fans
  2. Power supplies:
    A. MXW
    B. MXX
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where do the Unfiltered Exhaust Fans discharge to?

A

The Unit Vent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What will cause an Unfiltered Exhaust Fan to automatically start?

A

VC/YC taken to local(train related)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What will cause an Unfiltered Exhaust Fan to automatically stop?

A
  1. EMF-35, EMF-36 trip 2(train related)
  2. Safety Injection Signal(train related)
  3. Associated filtered exhaust fan shutdown
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the start permissive required to start an Auxiliary Building Ventilation Unfiltered Exhaust Fan?

A

The Auxiliary Building Ventilation Unfiltered Exhaust fan receives a start permissive from the Auxiliary Building Filtered Exhaust Fan running

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the capacity and power for the Auxiliary Building Ventilation Filtered Exhaust Fans?

A
  1. There are two 50% capacity filtered exhaust fans
  2. Power supplies:
    A. EMXG
    B. EMXH
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where do the Auxiliary Building Filtered Exhaust Fans discharge to?

A

The Unit Vent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What will cause an Auxiliary Building Ventilation Filtered Exhaust Fan to automatically start?

A
  1. Safety Injection Signal (train related)
  2. Blackout (unit and train related)
  3. VC/YC to LOCAL(train related)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What will cause an Auxiliary Building Ventilation Filtered Exhaust Fan to automatically stop?

A
  1. Motor overload

2. Tornado actuation

17
Q

How many Auxiliary Building Ventilation Filter Units are there, and what is there status during normal operation?

A
  1. There are two filter units, one for each filtered exhaust fan
  2. They are normally bypassed
18
Q

What will automatically place the Auxiliary Building Ventilation Filter Units in the filter mode?

A
  1. 0EMF-41 trip 2 (unit and train independent)
  2. 1(2)EMF-35 trip 2 (unit related)
  3. Safety Injection Signal (train related)
19
Q

What is the purpose of the Auxiliary Building Ventilation Heater Demisters, and when do they operate, and where are they located?

A
  1. The heater demisters extend the life of the charcoal beds by removing moisture
  2. The heater demisters energize when the associated filtered exhaust fan is energized and the associated filter unit return damper is open or intermediate
  3. The heater demisters are located in the ductwork coming from each ECCS area located upstream of the filter unit
20
Q

What ventilation fans exhaust to the Auxiliary Building Filtered Exhaust Fans suction?

A
  1. Counting Room Supply Filter Unit
  2. Counting Room Supply Unit
  3. Radwaste Area AHUs
  4. Filter and Demineralizer Room Exhaust Unit
  5. Aux Shutdown Panel Supply Units
  6. Waste and Recycle Evaporator Cooling Units
  7. Restricted Instrument Shop Cooling Unit
  8. P.D. Pump Room Cooling Unit
  9. Main Steam Doghouse Fans and Heaters
  10. Aux Building Electrical Penetration Rooms
  11. NM Sample Lab
21
Q

What will automatically start the Auxiliary Shutdown Panel Supply Units?

A

Blackout (unit and train related)

22
Q

What is the affect of a Safety Injection signal of the Auxiliary Shutdown Panel Supply Units?

A
  1. Safety Injection signal will trip the auxiliary shutdown panel air handling units
  2. They will be restarted by the load sequencer
23
Q

What is the Auxiliary Building Ventilation System response to placing VC/VY in LOCAL?

A
  • The following is train related*
    1. The Aux Building Filtered Exhaust Fans start
    2. The Aux Building Unfiltered Exhaust Fans start
    3. The Aux Building Supply Units start
24
Q

What is the Auxiliary Building Exhaust Systems response to a Blackout?

A
  • The following is unit and train related*
    1. The Aux Building Filtered Exhaust Fan trips and restarts
    2. Allows a MANUAL start of the Aux Building Unfiltered Exhaust Fans, and that will start the Aux Building Supply Units if they are in AUTO
    3. The Aux Building Unfiltered Exhaust Fan trips
    4. The Aux Shutdown Panel Supply Unit starts
25
Q

What is the Auxiliary Building Ventilation System response to Safety Injection?

A
  • The following is train related*
    1. The Aux Building Filtered Exhaust Fans trip and restart
    2. Closes isolation dampers to non-safety portions of the VA system so that only ECCS areas are exhausted
    3. The Aux Building Unfiltered Exhaust Fans trip, tripping the Aux Building Supply Units
    4. VA Filters are shifted to the Filter Mode
    4. The Vortex Dampers on the Filtered Exhuast Fan Suction modulate to control flow at 6450scfm, much lower than normal operation

The following is unit related
Filter and Demin Room Fans will trip

The following is unit and train related
The Aux Shutdown Panel Supply Units trip then restart

26
Q

What is the purpose of the Auxiliary Radwaste Building Area Chilled Water System, and it’s system designator?

A
  1. Consists of two 50% capacity air cooled chillers
  2. Radwaste AHUs are supplied by 1 of 2, 100% capacity chilled water pumps
  3. Makeup is from YM
  4. System designator is YR
27
Q

What is the purpose of the Auxiliary Building Cooling Water System, and what is the system designator?

A
  1. Provides cooling water to NM sample flow heat exchangers and to HVAC equipment in the Auxiliary Building
  2. The system designator is - YN
28
Q

What are the loads on the Auxiliary Building Cooling Water System?

A
  1. S/G Blowdown Sample Heat Exchangers
  2. Pressurizer Sample Heat Exchanger
  3. ND Sample Heat Exchanger
  4. NC Hot Leg Sample Heat Exchangers
  5. Restricted Instrument Shop Supply Unit
  6. Reciprocating Charging Pump Supply Unit
  7. Waste Evaporator Package Supply Unit
  8. Recycle Evaporator Package Supply Unit
  9. NM Sample Coolers
29
Q

How many chillers and chilled water pumps makeup the Auxiliary Building Cooling Water System?

A
  1. There are three YN pumps, 50% capacity each
  2. There are three closed circuit evaporative chillers
  3. Normal chilled water flow is 250gpm

Catawba Nuclear Station (72 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions