CCW

Question 1

What are the CCW Pump auto starts with the pump switch in auto?

Answer 1

• Load Shed
• SI
• Low discharge # @ 80#

Question 2

What are the CCW Pump auto starts with the pump switch in neutral?

Answer 2

• Load Shed

- SI

Question 3

What are the CCW Pump trips?

Answer 3

• Load shed
• Overload
• Overcurrent

Question 4

What are the CCW Safeguards loads?

Answer 4

• RHR Hx
• RHR pp Seal Hx
• CTS pp Seal Hx
• SI pp LO Cooler & Seal Hx
• CCP LO cooler

Question 5

What are the CCW Misc loads?

Answer 5

• SFP Hx - #1 load
• Letdown Hx
• Excess Letdown Hx
• RCP LO and Thermal Barrier Hx
• RCP Seal Water Hx
• CEQ Fan Motor Air Coolers
• WGC
• Reactor Vessel Support Coolers
• Cnt Penetration Coolers
• Sample HXs
• NBAE
• MS Penetration Coolers
• Recip CP
• Hydrogen Monitor
• PACHMAS

Question 6

What isolates on a Phase “A” for CCW?

Answer 6

• SFP Hx Isolates
• Excess LD Hx Isolates
• Reactor Support Cooler Isolates
• NBAE Isolates

Question 7

What isolates on a Phase “B” for CCW?

Answer 7

• RCP Cooling Isolates
  (Thermal Barrier and Lube Oil coolers)
• Requires Manual Trip of RCPs within 2 min **

Question 8

What are the SI actions for CCW?

Answer 8

• CCW Hx Outlet Opens (also open on LOOP) **
• RHR Hx Outlet Opens to 3000 gpm
• ESW to CCW Hx throttles to 5500 gpm
• Letdown Hx Isolates

Question 9

What are the power supplies for the CCW pumps?

Answer 9

• T11/21A West CCW Pump

- T11/21D East CCW Pump

Question 10

What power supply does the Spare CCW pump use?

Answer 10

• Utilizes controls and power supply of pump being replaced

Question 11

How tall is the baffle plate in the CCW Surge Tank and what is it for?

Answer 11

• Baffle plate is for train separation and its 48 in high = 3,300 gallons **

Question 12

Does the surge tank have any auto makeup?

Answer 12

• No, Demin water makeup water valves (CRV-410/411) have no auto actions and they fail closed **

Question 13

When will the CCW Surge tank vent valve (CRV-412) auto close?

Answer 13

• Vent valve (CRV-412) closes on CCW high rad signal

Question 14

How do the demin water makeup water valves (CRV-410/411) fail?

Answer 14

• They fail closed on loss of air or DC power **

Question 15

When does the CCW header low pressure alarm come in?

Answer 15

• Low pressure alarm is at 85 psig **

Question 16

How many Gallons per inch in the CCW Surge Tank?

Answer 16

-69 gal per inch

Question 17

What is the purpose for the Cntmt Penetration Coolers?

Answer 17

• Prevent concrete from drying out and cracking (spalling)

Question 18

What is the purpose of the RCP Thermal Barrier safety ?

Answer 18

• Lifts at 2485# and allows for ctrled shutdown

Question 19

When will the CCW Hx outlet valves open?

Answer 19

• SI

- Load Shed

Question 20

Are the CCW HX Valves credited to open on a LOOP?

Answer 20

• No

Question 21

What happens to CCW Sys when Cntmt press reaches 1.0 psig?

Answer 21

• CEQ fan motor cooler CIVs open

Question 22

What does the CCW Outlet Valve throttle flow to on an SI signal?

Answer 22

• Full open

Question 23

Why is there one line from CCW to the RCPs, and two lines coming out for the return from the RCPs?

Answer 23

• So we can isolate the thermal barrier if it leaking from the RCS

Question 24

What are the nominal minimum and maximum flow rates for the CCW pumps

Answer 24

• 3000 gpm minimum

- 9000 gpm maximum

Question 25

Do the CCW surge tank makeup valves automatically open

Answer 25

No

Question 26

What is the source of the emergency makeup to the CCW

Answer 26

ESW to the CCW pump suction via temp mod (will not maintain surge tank level)

Question 27

What is the most important load on the CCW miscellaneous header

Answer 27

SFP Hx