ESF Actuations

Question 1

What will cause an SI?

Answer 1

• Manual
• High Containment Pressure (2/3 @ 1# rising)
• Low PZR # (2/3 @ 1775# lowering)
• Differential Pressure Between Steam Lines (2/3 detectors and 1S/G < 2 others, 100#)
• Low SG # (2 S/G’s <500#)

Question 2

What will cause Containment Spray?

Answer 2

• Manual
• Hi-Hi Containment # (2/4 @ 2/8# rising)

Question 3

What will cause Containment Isolation Phase “A”?

Answer 3

• Manual
• SI Actuation

Question 4

What will cause Containment Isolation Phase “B”?

Answer 4

• Manual
• CTS Actuation

Question 5

What will cause a Steam Line Isolation?

Answer 5

• Manual
• Hi-Hi Containment # (2/4 @ 2.8#)
• High Steam Flow (1/2 on 2 S/G’s, 1.42E6(1.6E6)lbm/hr) with P-12 (2/4 loop Tavg < or
  equal to 541F)
• Low SG # (On 2 S/G’s <500#)

Question 6

What will cause a Turbine Trip AND FWI?

Answer 6

• Hi-Hi SGWL (2/3 on 1 S/G @ 67%)
• SI
• Rx Trip with Low Tave

Question 7

What will cause MDAFP’s to start?

Answer 7

• Lo-Lo SGWL (2/3 NR on 1S/G @ 5%(22%))
• 4kV Bus Loss of Voltage (2/3 on T-A or T-D busses, <94V(<93V))
• 4kV Bus Loss of Voltage (2/3 on BOTH T busses in same train, <94V(93V))
• SI
• Loss of both MFP’s (2/2 stop valves closed) (Only when switch in AUTO)
• AMSAC (3/4 FW flow <25%)

Question 8

What will cause TDAFP to start?

Answer 8

• Lo-Lo SGWL (2/3 on 2 S/G’s @ 5%(22%))
• RCP Bus UV (1/2 on 2/4 busses @ 88V lowering)
• AMSAC (3/4 FW flows <25%)