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ATR SRO Level of Knowledge > Air Systems > Flashcards

Air Systems Flashcards

TRA00239

1
Q

List the 676 Air Compressors

A

676-M-1 and 676-M-2

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2
Q

What are the major components of the 676 air system that supplies TRA 670?

A

Air Compressors (M-1/M-2)
Glycol Pumps (M-3 through M-6)
Fluid Coolers (M-7/M-8)
Air Dryers (M-9/M-10)
UH-5/UH-6)

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3
Q

Draw the TRA-676 Air System.

A
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4
Q

Draw simplified TRA-676 Air System.

A
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5
Q

How does the 676 air system function (lead/lag)?

A

Upon low pressure, lead compressor starts to restore pressure.
Operates in variable speed to maintain at setpoint. If pressure remains below low pressure setpoint, lag compressor starts and supplies additional air.
If both lead and lag are running, when high pressure setpoint is reached, lag compressor unloads.
If high pressure remains in for long enough, lead compressor will also unload.
After a programmed time, delay, compressor shuts off.

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6
Q

How many 676 air dryers are there?

A

There are two 676 air dryers: M-9 and M-10

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7
Q

How many 676 oil/water separators are there?

A

There are two 676 oil/water separators

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8
Q

Describe the operation of the glycol fluid cooling system for 676.

A

Two identical systems. Two cross-ties enabled either skid to cool either air compressor.

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9
Q

What are the 676 power supplies?

A

676-E-2 powers:
676-M-1 Compressor
676-M-3/4 glycol pumps
676-M-8 Glycol Fluid Cooler
676-M-9 Air Dryer
UH-5 Heater

676-E-3 powers:
676-M-2 Compressor
676-M-5/6 glycol pumps
676-M-7 Glycol Fluid Cooler
676-M-10 Air Dryer
UH-6 Heater

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10
Q

What components are supplied by the 670 instrument air system?

A

Pneumatic instruments
Control panels
Reg Valves
Bubblers
Door Seals
H&V Dampers
Emergency shutdown for M-43 (AMOT)
M-43 barring mechanism

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11
Q

What is the backup for door seal pressurization if instrument air is lost to 670?

A

Nitrogen bottles backup instrument air to the door seals.

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12
Q

What is the function of the Canal Area Mezzanine Air Tanks?

A

Three tanks used to reopen dampers after a loss of IA.

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13
Q

Which door seal is fed by Instrument Air?

A

Door 51

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14
Q

What components are supplied by 670 plant air system?

A

Air sparge to bypass demins
HP starting air backup (both M-43 and M-6)
Reactor instruments thimble purge
Service outlets

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15
Q

What is the sequence of events during a loss of instrument air?

A

Per AOP-6.1:
N-16 suction valves shut and discharge valve opens on loss of IA (cavitation)
LO Alarm at 120 psig
LOLO Alarm at 95 psig
Manual Rx Scram at 85 psig
Additional actions required if cannot maintain above 65 psig

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16
Q

What components are supplied by the HP Air System?

A

PCS Surge Tank
Diesel starting air
HDW expansion tank
Diesel shutdown safety function (AMOT M-43)

17
Q

Draw the HP Air System

A
18
Q

What are the power supplies for HP Air Compressors?

A

M-65 supplied from Diesel 670-E-11
M-66 supplied from Commercial 670-E-10

19
Q

Give the automatic trip for HP Air Compressors.

A

HPAC oil pressure <15 psig

20
Q

What is the function of the HP Air to the PCS Surge Tank?

A

50 cubic feet of air to dampen pressure transients. Manually controlled from DCS

21
Q

What is the function of the HP Air to the HDW Expansion Tank?

A

120 psig air dampens pressure transients.

22
Q

What is the normal HP Air pressure?

A

Nominal pressure for HP Air System is 285 psig.

23
Q

What are the TRA609 air compressors?

A

609-M-6 Rogers Compressor
609-M-7 Sullair Compressor
609-M-8 Sullair Compressor

24
Q

Describe the normal operation of the 609 air compressors.

A

Compressor autostart at 120 psig.
120 second timer:
If compressor is running in auto and maintains unload setpoint for 15 minutes, unloads and shuts down.

25
Q

What is the cooling water source for the 609 air compressors?

A

Raw water is normal cooling
Firewater is backup cooling

26
Q

What is the automatic shutdown for 609 air compressors (other than unload)?

A

Cooling water supply pressure <15 psig

27
Q

Draw the 609 air system.

A
28
Q

What are the main and control power supplies to the 609 air system?

A

609-M-6 fed from 609-E-1
609-M-7 fed from 609-E-102
609-M-8 fed from 609-E-101
Control power to 7 and 8 fed from 609-E-1

29
Q

What two 609 compressors are available on a loss of commercial power?

A

M-6 and M-8

30
Q

How is cooling water admitted to the 609 air compressors?

A

Solenoid valve opens when compressor is running.

31
Q

Why is a muffler installed on the 609 air system?

A

609 air system supplies more than required since it used to supply the entire complex. The muffler was put in place to sustain a constant air load on the system.

32
Q

What is the backup system for both 676 and 609 air systems?

A

Both have connections for portable air compressors.

ATR SRO Level of Knowledge (16 decks)

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