CCS

Question 1

What are the Trips and Auto Starts for the CCS Pumps?

Answer 1

Trips:

• Suction Pressure <25 psig for 5 seconds
• Motor Electric Fault
• Undervoltage

Auto Start:
Discharge Pressure <95 psig for 5 seconds

Question 2

What are the power supplies for the CCS Pumps?

Answer 2

CCS-P1A - SWG11
CCS-P1B - SWG13
CCS-P1C - SWG12

Question 3

What are the fail positions of the Temperature Control Valve and the Makeup Water Valve for CCS?

Answer 3

TCV - Max Cooling

M/U - Fails Open

Question 4

What loads on CCS have no TCV associated with their HX?

Answer 4

• Gen Leads Cooling(Bus Duct Cooling)
• CWS Pumps
• CNM-P1’s
• CNM-P2’s
• FWS-P1’s

Question 5

What loads on CCS have a TCV associated with their HX?

Answer 5

The following have a TCV on the CCS side of the HX:

• EHC
• OFG
• TLO
• GMH
• Gen Exciter Coolers

GMC has a TCV in the GMC side of the HX

Question 6

What actions are required on a loss of CCS per SOP-14?

Answer 6

• Scram

- Trip Turbine

Question 7

What are the start limitations for restarting a CCS Pump?

Answer 7

CCS Pump start limitations are as follows:
• Two starts in one hour from ambient temperature. A one hour wait is required before additional start attempts.
• One start at rated temperature (obtained after 30 minute run). A one hour wait is required before additional start attempts.

Question 8

What are the flow limitations for a CCS HX?

Answer 8

Limit of 8500 gpm to prevent tube vibration

Question 9

What are the CCS Pump operating limitations?

Answer 9

CCS Pump operating limitations are as follows:
• Maximum operating motor current is 58.5 amps.
• Minimum flow is 1,000 GPM.
• Maximum (runout) flow is 8,500 GPM

Question 10

What is the max SWP D/P across a CCS HX?

Answer 10

10 psid