AP-4 (loss vital or NV inst AC

Question 1

indications for loss of PY-11

Answer 1

• Chnl set 1 postage stamps trip (all that de-energize to trip)
• auto makeup unavailable
• LT-112 fails low
• PT-505 fails low
• IR-35 deenergizes

Question 2

indications for loss of PY-12

Answer 2

• Chnl set II bistables trip (all that are de-energize to tirp)
• lights for Chnl set III go out
• PT-505 fails low
• PT-506 fails low
• CVCS-8152 fails closed
• FT-128 fails low

Question 3

indications for loss of PY-13

Answer 3

• Chnl set III bistables trip (de energ to trip)
• LI-920 fails low (RWST lvl)
• SCMM unnavailable
• LCV-110 and 111 (MDAFW) de-energize

Question 4

indications for loss of PY-14

Answer 4

• Chnl set IV bistables trip (de-energ to trip)
• Chnl set I bistable lights go out
• letdown isolates
• N-31 and N-32 energize
• CVCS makeup controller unavailable

Question 5

Indications of Loss of :

PY-11A

PY-13A

PY-15

PY-16

PY-17

Answer 5

11A

• Chnl set II bistable lights off

13A

• Chnl set IV bistable lights off

15

• unrelated alarms (TCV’s fail as is)

16

• unrelated alarms ( CCW surge tank LI’s fail low)

17

• generator alarms (valve position for turbine valves indicates trouble)