Control Room Tell tale signs of loss of power

Question 1

How can you tell if NNN-D11 was lost?

Answer 1

Alarm window on board 1
RCP seal injection controllers (left 2 go dark)

Question 2

How can you tell if NNN-D12 was lost?

Answer 2

Alarm window on board 2
RCP seal injection controllers (right 2 go dark)

Question 3

How can you tell if NNN-D15 was lost?

Answer 3

Board 6 alarm pattern is across.

Hood spray indicator out

In unit 1 FWPT A steam valves will start closing, recirc valve will start opening. Trip ‘A’ MFP (IN UNIT ONE ONLY)

Question 4

How can you tell if NNN-D16 was lost?

Answer 4

Board 6 alarm pattern is down.

one of the controllers next to hood spray

In unit 1 FWPT B steam valves will start closing, recirc valve will start opening. Trip ‘B’ MFP (IN UNIT ONE ONLY)

Question 5

How can you tell if PNA or PNB was lost?

Answer 5

monitors on Board 5 on applicable channel

CREFAS/ CPIAS/ FBEVAS both trains actuate

(All class auxiliaries start) SP, EW, EC

Question 6

How can you tell if PNC was lost?

Answer 6

‘C’ CPC monitor goes blank, No SESS or RU alarms

The pac-man for 3/4 of the core on Ovation on core mimic screen, you have to select on one of the ancillary screens because the screen we normally look at loses power.

Question 7

How can you tell if PND was lost?

Answer 7

D’ CPC monitor goes blank
The anti-pac man for 1/4 the core on Ovation on core mimic screen, main screen we look at still available, we do lose other screens.

Question 8

How can you tell if NKN-D42 was lost?

Answer 8

lose CHP’s
lose letdown
Lose EDP ‘A’ handswitch lights
NAN-S02 LC breaker lights lost
A Diesel Air Start SEIS light on