IA: Instrument Air

Question 1

Is the IA System safety related?

Answer 1

No

Question 2

What is the power supply to the IA Compressors?

Answer 2

NG

Question 3

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

Answer 3

3

100%

Question 4

What is the IA pressure requirement to operate components?

Answer 4

80 psig

Question 5

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

Answer 5

N2

85 psig

Question 6

How many air compressors are normally running?

Answer 6

1

Question 7

What cools the IA Compressors normally?

Answer 7

TC

Question 8

What cools the IA Compressors during an outage?

Answer 8

DS

Question 9

What will isolate IA to containment?

Answer 9

CSAS

Question 10

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

Answer 10

Yes

Question 11

What position does IAA-UV-2 fail?

Answer 11

Closed on a loss of power (PKA)

Question 12

IA Receivers are sized to provide _____ seconds of storage.

Answer 12

30 seconds

Question 13

How often does the IA Master Controller cycle IA Compressors?

Answer 13

Once a week

Question 14

What is the normal IA band?

Answer 14

109 psig - 119 psig

Question 15

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

Answer 15

109 psig

Question 16

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

Answer 16

119 psig

Question 17

At _____ psig all IA Compressors are unloaded.

Answer 17

124 psig

Question 18

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

Answer 18

20 seconds

Question 19

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

Answer 19

15 seconds

stops

Question 20

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

Answer 20

A-B-C

Question 21

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

Answer 21

It will immediately stop without unloading

Question 22

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

Answer 22

Separator

Question 23

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

Answer 23

Pressure in the Separator Tank

Question 24

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

Answer 24

+ 95F

Question 25

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

Answer 25

150 A loaded

90 A unloaded

Question 26

Where is all the IA stuff in the Control Room?

Answer 26

B07

Question 27

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

Answer 27

95 psig

Question 28

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

Answer 28

Opens at < 85 psig

Closes at 105 psig

Question 29

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

Answer 29

1

Question 30

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

Answer 30

Always

Question 31

At what pressure is Service Air maintained?

Answer 31

115 psig - 125 psig

Question 32

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

Answer 32

30 minutes

Question 33

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

Answer 33

Standby Compressors then low pressure alarm