AP-17

Question 1

AP-17

What are the different sections to Loss of Charging?

Answer 1

A - loss of all charging

B - charging equip malfunction

C - charging leak (at power)

D - charging leak (on RHR)

Question 2

AP-17

When in section A of loss of charging what condtions will have you trip Rx?

are there any “extra” actions that must be taken in these circumstances?

Answer 2

Loss of Thermal Barrier cooling to RCP’s and cant be immediatly restored

• trip RCP’s
• isolate seal inj to RCPs (before restart CCP)
• close FCV-357 (CCW return isolation)

During ramp to inject SI pumps, Lpzr cannot be maintained > 17%

• nothing extra

Question 3

AP-17

During a loss of all charging, what is the main success path if a CCP cannot be restored?

Answer 3

• Ramp unit
• cool down
• depressurize
• use SI pump to inject and control Lpzr

Question 4

AP-17

When are you directed to AP-1 while progressing through Charging line leak (section B)

Answer 4

• Once you isolate letdown and charging and Lpzr is still lowering