AOP-26 "Loss of SFP Cooling"

Question 1

AOP-26 entry conditions

Answer 1

• EK-1307 “Fuel Pool Clg Pumps P-51A and/or P-51B Trip” AND P-51A or P-51B aligned to spent fuel pool cooling
• EK-1309 “Spent Fuel Pool HI/LO Level” (LO level @ 646’)
• Spent Fuel Pool level lowering as indicated on LI-2141, Channel A SFP Level, or LI-2142, Channel B SFP Level
• TIA_0925_D, “PPC Urgent Alarm, SFP High Temperature” (140 F)
• TIA_0926_D, “PPC Urgent Alarm, SFP North Tilt Pit High Temperature” (140 F)

Question 2

AOP-26 automatic actions

Answer 2

NONE

Question 3

AOP-26 reactor trip criteria

Answer 3

NONE

Question 4

AOP-26 immediate actions

Answer 4

• Place irradiated fuel bundles that are in hoist boxes in 1 of the following locations:
  1. bundle’s previous location
  2. bundle’s future location
  3. tilt machine, then tilt horizontal
  4. reactor engineering specified location
• Lower SFP Elevator to lower limit
• Move irradiated fuel bundles in Ultrasonic Test Rig or Ultrasonic Fuel Cleaning Rig to their fuel storage rack location