Secondary and UCW System

Question 1

What is the purpose of the SCS?

Answer 1

Remove reactor generated heat and controls PCS temperature.

Question 2

Where does SCS waste heat go?

Answer 2

Rejected through the ATR Cooling Tower TRA-771

Question 3

What is the flowrate for SCS?

Answer 3

20000 (2 pump) -34000 (4 pump) GPM

Question 4

What is the capacity of the SCS?

Answer 4

460000 gallon

Question 5

What is the temperature of the SCS?

Answer 5

HX Outlet - 120F
Cooling tower basin - 90 F

Question 6

What is the operating pressure of SCS?

Answer 6

40 psig at pump discharge
20 psig system pressure

Question 7

Draw SCS

Answer 7

Question 8

From what loads does UCW receive waste heat?

Answer 8

ATR Experiment Loop Equipment via HDW system
M-42/43 DGs

Question 9

Relationship between UCW and SCS?

Answer 9

Backups for each other.

Question 10

Describe SCPs.

Answer 10

4 installed Vertical Deepwell turbine pumps
4160V
350 HP
10000 gpm each

Question 11

What is the power supply for SCPs?

Answer 11

670-E-1/2

Question 12

Where are SCPs located?

Answer 12

TRA-671 Secondary Pump House

Question 13

Where are SCP start/stop switches located?

Answer 13

Started from buttons inside pump house.

Question 14

What is the function of Temperature Control Valve TCV-1-10?

Answer 14

Controls primary reactor coolant inlet temp by controlling secondary flow through HXs.

Question 15

What is the power supply for TCV-1-10?

Answer 15

TRA-671 LP-19 Commercial Power

Question 16

Fail position of TCV-1-10?

Answer 16

Fails as is