P71 PCW

Question 1

What plant chiller trips auto-restart?

Answer 1

Low chilled water flow 34” w.c. diff
Low condenser flow 25” w.c. diff.
Undervoltage
Low oil temp (55°F reset @ 71°F)
Low discharge temp 36°F

Question 2

How long does the plant chiller oil pump run?

Answer 2

50 seconds prior to start
150 seconds after shutdown
If activated it Runs 10 minutes then auto stops if chiller is not running

Question 3

How long after starting before chiller can be restarted?

Answer 3

30 minutes

Question 4

What does plant chill water oil heater do?

Answer 4

115V heater maintain oil temp between 135°F and 145°F

Question 5

What water supplies chilled water head tank?

Answer 5

P21 makeup water

Question 6

What cools plant chill water?

Answer 6

PSW

Question 7

What does the 2 primary pump feed?

Answer 7

3 secondary loops
Aux steam tunnel
Rad waste 
Rad waste control room
CTMT penetration #83 (RWCU return)

Question 8

What are the power supplies for plant chillers/

Answer 8

“A” 13AD
“B” 13AD
“C” 14AE

Question 9

When will the standy primary chilled water pump auto start?

Answer 9

<77psig discharge pressure

Question 10

What are 3 major loads of PCW?

Answer 10

Aux steam tunnel
Diesel rooms coolers (not tech spec required one)
Circ pump motor thrust bearing

Question 11

What are the only valves that will isolate for PCW?

Answer 11

148, 149, 150 CTMT isolation

Question 12

When will the PCW isolation valves isolate?

Answer 12

Group 6

Question 13

Will PCW isolation valves cause a pump trip

Answer 13

No

Question 14

What will be lost on CTMT/DW isolation of PCW?

Answer 14

CTMT Cooling