40AO-9ZZ15 Loss of Annunciators

Question 1

What are entry conditions for 40AO-9ZZ15 Loss of Annunciators?

Answer 1

• Annunciator check fails
• All windows lit for no reason
• Invalid alarms on panel
• Alarm windows dimly lit
• All windows flash bright and extinguish
• No alarm when there should be
• PWR OR GND TRBL alarm

Question 2

What are the power supplies for the Annunciator Logic Cabinets?

Answer 2

Rule of 58

Cabinet 1:

• Norm - NKN-D43
• Alt. - NNN-D15

Cabinet 2:

• Norm - NKN-D42
• Alt. - NNN-D16

Question 3

How are the units affected by a loss of NKN-M45 with a SIAS?

Answer 3

• U1/2 - Loss of ALL annunciators
• U3 - Loss of HALF annunciators
• U3 NNN-D16 B/U power is class vs SIAS L/S

Question 4

Are the Annunciator Logic Cabinets inverters NORMAL seeking or POWER seeking?

Answer 4

• Normal seeking

Question 5

What action during 40AO-9ZZ15 Loss of Annunciators could provide operators with AUDIBLE alarm indications?

Answer 5

• Ensure PC audible alarms are turned ON

Question 6

What action during 40AO-9ZZ15 Loss of Annunciators is required if PC is NOT available?

Answer 6

• Stabilize plant
• Stop unnecessary evolutions
• COLSS PC ALARM response
• Contact OCS

Question 7

During 40AO-9ZZ15 Loss of Annunciators, when would it be required to Notify Unit Ops Manager?

Answer 7

• ≥ 4 annunciator panels are non-functional