CCW

Question 1

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

Answer 1

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

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 are the Phase “A” actions for CCW?

Answer 6

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

Question 7

What are the Phase “B” actions 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 5000 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 5 ft high = 4,000 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

What protects the CCW surge tank if the vent valve is closed?

Answer 14

• Safety valve and vacuum breaker protect surge tank when vent is closed

Question 15

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

Answer 15

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

Question 16

When does the CCW header low pressure alarm come in?

Answer 16

• Low pressure alarm is at 85 psig **

Question 17

How many Gallons per inch in the CCW Surge Tank?

Answer 17

-69 gal per inch

Question 18

What is the purpose of the CCW tank Baffle?

Answer 18

• Provides train separation and redundancy for passive failure during recirculation phase of LOCA

Question 19

When does the CCW Auto Start on a Load shed w/o SI?

Answer 19

• 3 sec

Question 20

When does the CCW Auto Start on a Load shed with SI/CTS?

Answer 20

• 15 sec

Question 21

What is the purpose for the Cntmt Penetration Coolers?

Answer 21

• Prevent concrete from drying out and cracking (spalling)

Question 22

What is the purpose of the RCP Thermal Barrier safety ?

Answer 22

• Lifts at 2485# and allows for ctrled shutdown

Question 23

When will the CCW Hx outlet valves open?

Answer 23

• SI

- Load Shed

Question 24

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

Answer 24

• No

Question 25

How many CCW Trains are required to be Operable in Modes 1-4?

Answer 25

• 2 CCW Trains required

- Restore w/in 72hrs

Question 26

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

Answer 26

• CEQ fan motor cooler CIVs open

Question 27

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

Answer 27

• Full open

Question 28

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

Answer 28

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