LOT 202.26 Service / Instrument Air

Question 1

• LOT 202.26 Service / Instrument Air*
• • *

What cools the instrument air compressors?

Answer 1

• Compressor 11 - 13:*
• *CL-ACW**
• Compressor 14:*
• *Air Cooled**

Question 2

• LOT 202.26 Service / Instrument Air*
• • *

What happens as IA pressure lowers?

Answer 2

• 122 psig / 119 psig / 116 psig / 113 psig:*
• *Compressors 11 - 13 / 14 Start**
• Lead / Standby / Lag / Air Cooled*
• 100 psig:*
• *Service Air Isolation Closes**
• Reset on ZLP-134 (TGB 29’ by compressors 11/12/13)*
• 90 psig:*
• *IA to yard Closes**
• 88 psig:*
• *Low Power FRVs drift closed**
• 80 psig:*
• *IA Dryer Bypass Opens**
• Reset by valve*
• *Letdown Header Orifice header isolation valves drift Closed**
• 67 psig:*
• *MFRVs drift Closed**

60 psig:
Manually Trip the Rx
MSIVs drift Closed

Service / IA Air pressure indicated on CP008.

Question 3

• LOT 202.26 Service / Instrument Air*
• • *

What is powered from MCC 1G5?

Answer 3

Compressor 14

• *Emergency Cooling Water Pump****
• Supplies Compressor 11 or 12 (Loss of CL-ACW pumps)*

Dryer Skid 11

Note:
Was taken out of procedure, so not used anymore.