AOP-37, Loss of Instrument Air

Question 1

What is the purpose of AOP-37, Loss of Instrument Air?

Answer 1

Provides operator actions that must be accomplished subsequent to a loss of instrument air.

Question 2

What are the entry criteria for AOP-37, Loss of Instrument Air?

Answer 2

• EK-1101, “CONTAINMENT INSTR AIR LO PRESS” (85 psig)
• EK-1102, “INSTRUMENT AIR LO PRESS” (85 psig)
• EK-1103, “SERVICE AIR LO PRESS” (80 psig)

Question 3

What are the automatic actions for AOP-37, Loss of Instrument Air?

Answer 3

• Standby Instrument Air Compressor(s) starts at 92 psig
• CV-1212, Service Air Header Isol closes at 85 psig in the Instrument Air Header

Question 4

What are the trip criteria for AOP-37, Loss of Instrument Air?

Answer 4

Erratic equipment behavior observed on equipment required for safe plant operation

Approximately 50 psig.

Question 5

What are the immediate actions of AOP-37, Loss of Instrument Air?

Answer 5

None

Question 6

What are the operator actions for AOP-37, Loss of Instrument Air?

Answer 6

As needed:

• Place C-2A/B/C to Hand
• Cross-tie FW Purity Air
• If Instrument Air NOT greater than 85
  
  • THEN announce twice (“Personnel using breathing air stop work and leave your immediate work area now.”)
  • Trip V-7
• Send NPOs to compressors/dryer.
  
  • Bypass dryer
• EOP Supplement 36, CV Tracking Sheet