AP-9 (loss of inst air)

Question 1

AP-9

What are the major actions catagories to Loss of instrument Air?

Answer 1

• Stabilize plant
• Alert personnel
• Restore inst air hdr press
• Identify leak location
• Isolate leak

Question 2

AP-9

What conditions during loss of instrument air will warrent a Rx trip?

Answer 2

If the following cannot be controlled in their normal operating bands:

• L _s/g
• L _pzr
• P _pzr

Question 3

AP-9

Why should long term use as Service air as a backup source be avoided?

Answer 3

prevent contamination of Instrument Air from Service air

Question 4

AP-9

What are the major actions associated W/ appx B.

Answer 4

Achieve & Maintain HSBY w/ Rx trip and loss inst air

• Maintain Tavg w/ 10% stm dmps
• Maintain Lpzr with CCP
• Secure Sec plant
  
  • close MSIV’s
  • trip MFW
  • Recirc cond thru polisher
• Maintain HSBY