Which of the following is a reason for maintaining the charging pump cooling system (CCE) temperature at or greater than 85 degrees F?
prevent condensation in the charging pump oil system
Where are the major CCE components located?
SW corner AB 24’
Normally the CCE system operates with one pump running, the suction and discharge cross connects open, and flow through both trains.
Identify how the alignment changes on a SI signal?
standby pump auto starts, suction and discharge cross connects close, resulting in 2 independent cooling trains
What is the purpose of the divider plate inside the SI pump component cooling (CCI) surge tank?
allows one train of CCI to remain undrained in the event of a system leak
During normal charging pump cooling system operation, the running CCE cooling pump trips.
Which statement describes the response of the CCE system?
the standby CCE pump auto starts
What condition will cause the charging pump cooling pump suction cross connects to auto close?
LOOP
SI
The “A” charging pump cooling pump is in AUTO and REMOTE.
What will cause a start of the pump?
LOP
SIS
low discharge header pressure
What will directly cause the SI cooling pump (3CCI*P1A) to auto start?
“A” SI pump running signal
Which of the following systems provide make up water to the SI cooling system surge tank?
CCP
What is the purpose of the CCE system?
remove heat form the charging pumps lube oil systems and transfer that heat to the service water system
What is the purpose of the CCI system?
remove heat from the SI pumps lube oil systems and transfer that heat to the service water system
Plant 100% and normal lineup.
What is the status of the CCI system?
no CCI pumps running and no CCI pump suction or discharge cross connect valves
Service water temp drops to 33F. What are the operators required to do with the CCI system and why?
run both CCI pumps to prevent freezing on the fresh water side of the CCI HX
A SI in in progress
CCI pump ruptures at the discharge of the “A” SI pump lube oil cooler
CCI surge tank level drops
M/U valve opens, CCI tank level continues to drop
What will be the result of the piping failure?
only the “A” train of CCI will drain, since CCI surge tank has divider plate
