635 Loss of Heater O2 (65-EOP-5003)

Question 1

OPER/CCR - 1.1.1 - IF outlet temperature on Reactor Feed heater (635F0001), is not responding to changes in Fuel Gas flow, or Oxygen concentrations is less than 2% O2, as indicated by Outlet Oxygen Analyzer (65AI0001), MONITOR Reactor Feed Heater for the following:

Answer 1

CCR - Very Low Oxygen (<2.0%) or zero, as indicated by Reactor Feed Heater Stack Analyzer (65AI0001)

CCR - Fuel Gas to heater is increasing and the outlet temperature is decreasing (no change in feed to the heater)

Question 2

OPER - Stack Smoking

OPER - Abnormal Noise or Rumbling

Answer 2

CCR - Heater coil outlet temperatures are fluctuating with no changes to the other process variables

Question 3

OPER/CCR - 1.1.2 - IF Emergency Alarm Activates or Oxygen concentration is less than 2% O2,
PERFORM the following:

Answer 3

CCR - A - REDUCE Fuel Gas pressure to increase Oxygen concentration greater than 2% O2

Question 4

CCR - B - TURN OFF Fuel Gas DMC to prevent inappropriate adjustments to Reactor Feed Heater

Answer 4

CCR/OPER - C - COMPARE board and outside indications on Damper position and Main Stack Damper position from ground level

Question 5

CCR - D - PLACE appropriate Damper in Manual in current position

Answer 5

1.2 - Complete Supplemental Actions