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ATR SRO Level of Knowledge > Firewater and Fire Protection > Flashcards

Firewater and Fire Protection Flashcards

TRA00095

1
Q

Where does ATR get firewater from?

A

Snake River Plain Aquifer

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2
Q

Give layout of ATR Complex Water Overview, Including Firewater.

A
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3
Q

What is the power supply for DW1?

A

Comm Power TRA-786 4160V

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4
Q

What is the power supply for DW3?

A

Diesel Power 786-M-1 4160V

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5
Q

What is the power supply for DW4?

A

Comm Power 670-E-1 4160V

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6
Q

What is the capacity of the Ground Level Storage Tanks?

A

375,000 gallons each

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7
Q

What supplies water to the GLSTs?

A

Deep Wells

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8
Q

How many GLSTs are there?

A

There are 3 GLSTs

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9
Q

What firewater loops are there?

A

ATR and Utility Area Firewater Loops

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10
Q

What tank is associated with ATR firewater loop?

A

Million gallon tank.

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11
Q

What separates firewater loops?

A

Double check valves.

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12
Q

What do the double check valves do for our firewater system?

A

Makes it so that firewater can go from Utility Area to ATR fire loop but not the other way around.

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13
Q

What maintains constant pressure on the firewater loops?

A

Raw Water Overhead Storage Tank

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14
Q

What firewater header pressure is maintained by the OST?

A

65 psig

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15
Q

What is the tank capacity for the OST?

A

OST has a capacity of 150k gallons.

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16
Q

What is the likely cause of FW main pressure low with no FW pumps running?

A

Bailey valve out of position.

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17
Q

Where is the bailey valve located?

A

TRA0619 pump house.

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18
Q

Where is the controller for the bailey valve?

A

Panel in the demineralizer building.

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19
Q

What is the impact of loss of instrument air on complex water system?

A

Overhead storage tank level must be manually controlled as bailey valve will fail as-is.

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20
Q

What building is the RWOST level control located in?

A

TRA-608

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21
Q

How do you locally control the bailey valve?

A

Isolate/bleed off instrument air and control it.

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22
Q

What are the power supplies for the 619 raw water pumps?

A

619-1 480V comm
619-6 2400V comm
619-7 2400V comm
619-8 2400V comm/diesel

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23
Q

Describe low firewater system header pressure actuation for the fire system?

A

A pressure drop to 65psig initiates timer, which resets at 75psig before timer counts down
TRA-633-1 starts 75 seconds after loss of commercial power (even with no loss of pressure)

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24
Q

What feeds Diesel fire pump block heaters and battery chargers?

A

Fed by commercial power

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25
How are diesel fire pumps shut down?
Must be SD manually.
26
Describe OFF/AUTO/MANUAL switch modes for DFPs?
OFF - Places the pump in OFF MANUAL - place the pump in manual bypass and select which battery bank starts it (1 or 2) AUTO - Starts on low pressure of firewater system.
27
Describe 619 firewater pumps.
TRA 619-12 (Electric FP): 2400V, 3500 GPM pump TRA 619-10 (Diesel FP): V-12 2-stroke engine 3500 GPM
28
Power for TRA 619-12 Electric FP?
Powered from both commercial and diesel power
29
Required action if Diesel FP controller fails?
Start locally.
30
What action is required on Mechanical Overspeed for FPs?
Rest locally
31
Describe firewater pump battery banks.
Two sets of 12V batteries wired in series for 24V bank (starting current)
32
Describe 633-1 Diesel FP.
John Deere 2500 GPM pump.
33
Describe Auto-start for TRA-633 FP?
Starts automatically on loss of commercial power for 75 seconds. Does this because battery charger is no longer supplying battery bank.
34
Designator for million gallon tank?
TRA-781
35
What is the control band for the million gallon tank?
290-310 inches
36
What FPs are supplied by TRA-781 million gallon tank?
688-M-1 and M-2
37
What systems can fill TRA-781 million gallon tank?
TRA-619 cooling tower pumps or ATR Fire Loop
38
Describe the TRA-688 Diesel FPs.
TRA-688-M-1 and M-2 V6 2-Stoke Detroit Diesel 2500 GPM per pump
39
Capacity of 688 FP fuel tanks?
500 gallon diesel fuel tank on each 688 FP
40
Why must 688 diesels be continuously monitored when running?
No overpressure protection on the system. Need to prevent runaway diesel.
41
Why are there no relief valves on the 688 diesel fire pump systems?
EFIS - defeat EFIS function if a relief valve opens and dumps water prior to being injected in the reactor
42
How to start 688 diesels on the batteries?
Manual Crank 1 and 2 to start on each battery bank.
43
From where do you fill 688 diesel FP fuel tanks?
Tanks are filled from inside of the building on the east and west sides.
44
What trips exist on diesel FPs during testing?
Engine Overspeed Low Oil Pressure High Temperature
45
What trips exist on diesel FP following low pressure autostart?
Overspeed only.
46
Where are the overspeed sensors installed?
Mounted directly on the diesel engine.
47
What provides freeze protection for TRA-781 and 688 fire equipment?
Recirc pump and heater 25 GPM pump starts at 40F ambient Two 15 kW heaters heat automatically Recirc to 781.
48
List the uses of the firewater at ATR.
ATR Emergency Fire Water Injection (EFIS) Fire Fighting Canal Fire Water Makeup Backup enterprise diesel cooling (via PCV-4-7 @ 50 lbs utility cooling water pressure) Yard watering Reactor Spray System
49
What is the purpose of the firewater reactor spray system?
Air-wash down to decrease concentration of FPs No credit taken for this system in the SAR Not an ESF or safety system.
50
List the Firewater Pump start times.
688-M-1 DFP -> 5 sec 688-M-2 DFP -> 15 sec #1 DFP -> 25 sec #2 DFP -> 35 sec EFP -> 45 sec All start at 65 psig
51
Why a 10 second delay between FP starts?
Prevents all pumps starting at the same time.
52
Draw Critical Firewater Path.
53
what is the design for the Reactor Room Spray System?
Reduce Iodine concentration in the building air to 1% of original value in 10 hours.
54
Where are the Rx Spray switches?
One in the RCR, Second in the TRA guardhouse TRA-658
55
Where is Backup Enterprise Cooling PCV-4-7 located?
North wall of the switchgear room.
56
What EFIS line supplies M-43 diesel on a loss of cooling?
Bottom Head EFIS through PCV-4-7.
57
Describe firewater emergency interface with Canal level.
670-E-510 monitors canal level and injects firewater if level gets to 8'. Normal is 19.8'.
58
Describe critical firewater path.
Deepwells to ground Storage Tanks, feed to 633 and 619 fire pumps, which deliver to upper and lower EFIS.
59
What is the basis for the minimum level in TRA-781 million gallon tank?
>227 inches Allows 50 minutes to ensure only a single TRA-688 pump is running Allows additional 75 mins to start up and align deepwell pumps for long-term firewater supply.
60
What is the minimum level in TRA-781 that is considered usable?
At or above 8"
61
What satisfies TSR 3.5.5 Cask Handling, Irradiated FE storage and Irradiated Experiment Storage?
Canal firewater makeup system OPERABLE with: TRA-781 >227 inches and 1 OPERABLE FWP 688-M-1/2 OR TRA-719 >19ft 1 in and 633-1 OPERABLE
62
What is the deepwell requirement per TSR 3.2.1.2 EFIS
With irradiated fuel or experiments in vessel: TRA-781 >227 inches FWPs 688-M-1/2 OPERABLE EFIS flow path OPERABLE (either bottom OR upper) Critical Firewater Path OPERABLE Two deepwell pumps OPERABLE with 1 powered by diesel
63
What is the EFIS requirement per TSR-3.2.1.2?
EFIS flow paths (bottom and upper) OPERABLE
64
Where is the main fire panel?
ATR Front Door (contains workstation and PA system)
65
Where does ATRs fire panel communicate to?
CFA
66
Where are the ATR fire system Notifier AFP-200 panels located?
RDAS Near SATS/PPS D Room
67
Types of detectors in our fire protection system.
Ionization Smoke Detector Photoelectric Smoke Detector Thermal Heat Detector Heat Actuating Device
68
Pros and Cons of Ionization Smoke Detectors
PROS: Good at detecting small amounts of smoke Able to detect gases before fire fully develops CONS: Spurious alarms
69
Pros and Cons of Photoelectric Smoke Detectors
PROS: Good at detecting smoky fires-smoldering CONS: False alarms
70
Why use heat detector instead of smoke detector?
Normally used in dirty environments or where dense smoke is produced. Less sensitive. Thermistors decrease in resistance as temp rises.
71
What actuates Halon?
Any two smoke detectors except in RCR
72
How does manual pull station for halon system work?
Immediate discharge of halon system. Overrides all controls, including abort switch
73
How does the halon abort button work?
Delays discharge if activated before 30 second TD. Must be continually pressed to inhibit the system. Stops the timer. Releasing initiates a 10 second timer before activation. Abort button can be operated multiple times, with each operation resetting the discharge timer to 10 seconds.
74
Describe RCR halon system.
Three cylinders that operate simultaneously as one system. One on the roof of the RCR Two in Halon Cylinder Storage Shed adjacent to the east wall of TRA-670.
75
Describe RDAS fire protection.
RDAS protected by single Halon system.
76
Describe PPS Room fire protection.
Each room protected by an independent halon system. Cylinders for each are outside each room.
77
What types of sprinkler systems are used at ATR?
Wet Pipe Dry Pipe Pre-Action Deluge
78
Does halon auto actuate in RCR?
No

ATR SRO Level of Knowledge (35 decks)

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