IA: Instrument Air Flashcards

1
Q

Is the IA System safety related?

A

No

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2
Q

What is the power supply to the IA Compressors?

A

NG

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3
Q

PVNGS has ___ compressors that can provide _____% capacity each.

A

3

100%

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4
Q

What is the IA pressure requirement to operate components?

A

80 psig

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5
Q

What is the backup supply to IA? When does it open?

A

N2

85 psig

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6
Q

How many air compressors are normally running?

A

1

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7
Q

What cools the IA Compressors normally?

A

TC

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8
Q

What cools the IA Compressors during an outage?

A

DS

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9
Q

What will isolate IA to containment?

A

CSAS

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10
Q

If IAA-UV-2 closed automatically, can it be overridden?

A

Yes

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11
Q

What position does IAA-UV-2 fail?

A

Closed on a loss of power (PKA)

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12
Q

IA Receivers are sized to provide _____ seconds of storage.

A

30 seconds

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13
Q

How often does the IA Master Controller cycle IA Compressors?

A

Once a week

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14
Q

What is the normal IA band?

A

109 psig - 119 psig

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15
Q

At _____ psig the delay timer is used to determine if additional IA Compressors need to be loaded.

A

109 psig

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16
Q

At _____ psig the delay timer is used to determine if additional IA Compressors need to be unloaded.

A

119 psig

17
Q

At _____ psig all IA Compressors are unloaded.

A

124 psig

18
Q

When the IA Master Controller starts a compressor, it runs unloaded for _____ seconds.

A

20 seconds

19
Q

When the IA Master Controller stops a compressor, it runs unloaded for _____ seconds and then ______.

A

15 seconds

stops

20
Q

What sequence do the IA compressors default to if the Master Controller fails?

A

A-B-C

21
Q

What happens if you press the Emergency Stop button on an IA Compressor?

A

It will immediately stop without unloading

22
Q

The IA Compressor discharges high pressure and temperature oil-air mixture to the ____________.

A

Separator

23
Q

What provides the motive force for oil to circulate through an IA Compressor?

A

Pressure in the Separator Tank

24
Q

What is the temperature rise from inlet to outlet on an IA Compressor?

A

+ 95F

25
Q

Normal loaded amps for and IA Compressor is _______A. Normal unloaded amps is _________A.

A

150 A loaded

90 A unloaded

26
Q

Where is all the IA stuff in the Control Room?

A

B07

27
Q

When does the Low Pressure alarm come in for IA in the Control Room?

A

95 psig

28
Q

At what pressures does the N2 backup to IA isolation, PV-52, open and close?

A

Opens at < 85 psig

Closes at 105 psig

29
Q

How many air dryers are normally in service in the IA system?

A

1

30
Q

When will operation of a CR hand switch stop a running IA Compressor?

A

Always

31
Q

At what pressure is Service Air maintained?

A

115 psig - 125 psig

32
Q

If the Service Air Compressor runs unloaded for _____ minutes then the drive motor trips.

A

30 minutes

33
Q

What comes on first: Standby IA Compressors or the IA low pressure alarm?

A

Standby Compressors then low pressure alarm