NESW

Question 1

Name the NESW suction sources?

Answer 1

Unit 1 intake and discharge tunnels.

Unit 2 intake and discharge tunnels.

Question 2

What are the three NESW headers?

Answer 2

Turbine
Aux/Containment.
Misc.

Question 3

What are the loads on the NESW turbine headers?

Answer 3

TSC AC (unit 1 only)
EHC cooler.
AFP bearing coolers.
PAC.
PAC after cooler.
CAC.
CAC after cooler.
Containment chill water condensers.
Seal oil coolers (unit 2 only).

Question 4

What are the loads on the NESW Aux/Containment headers?

Answer 4

Steam Generator flash tanks.
Blow down HX.
Upper containment Vent units (4) .
Lower containment Vent units (4).
Interment room vent units (2).
RCP motor air coolers (4).

Question 5

What are the loads on the NESW Misc. header?

Answer 5

Chemical cleaning mix tank.
Turbine room sump ring header.
MUP.
Plant Heating Boiler blow down tank.
Glycol Chillers.

Question 6

What is unique about the NESW misc. header?

Answer 6

It is supplied by both units.

Question 7

What would happen If you isolated the NESW misc. header from both units?

Answer 7

The glycol chillers would trip.

Question 8

What are the Auto starts of the NESW pumps?

Answer 8

Low discharge pressure Unit 1 is 55# Unit 2 is 60#.
Blackout Sequence.
SI.

Question 9

What are the NESW pump power supplies?

Answer 9

Unit 1
South 11B.
North 11C.
Unit 2
South 21B.
North 21C.

Question 10

What is the NESW strainer auto backwash sequence?

Answer 10

1. Drain valve opens.
2. Backwashes for preset time.
3. Drain valve closes.

Question 11

What happens to NESW if you have a phase B actuation?

Answer 11

Both pumps will be running as a result of the SI.

All containment NESW supply and return isolation valves will close.