Spray Ponds

Question 1

When will a spray pond pump automatically start?

Answer 1

SIAS, CSAS, CREFAS, CREVIAS, DG running

Question 2

How many spray pond nozzles per pond

Answer 2

320 nozzles

Question 3

What are the holes on the bottom of some of the risers in the spray pond for?

Answer 3

Freeze protection

Question 4

What is normal discharge pressure for an operating spray pond pump?

Answer 4

50-55 psig

Question 5

What does the spray pond cool?

Answer 5

• Essential cooling water heat exchanger
• DG fuel oil cooler
• DG JW cooler
• DG air after cooler
• DG lube oil cooler

Question 6

What are the makeup sources for spray pond?

Answer 6

TB and domestic service water

Can use Fire protection in an emergency

Question 7

If the spray ponds are tied together and we lose all makeup sources; how long could the spray ponds supply adequate cooling?

Answer 7

26 days

Question 8

What is the minimum Spray Pond level for Spray pond pump operation?

Answer 8

1’6”

Question 9

What is the tech spec limit for spray pond level?

Answer 9

13’ 6”

Question 10

At what level in the spray pond will the spray pond filter pump trip?

Answer 10

13’ 7.5”

Question 11

At what level in the spray pond will the control room receive a low level alarm?

Answer 11

13’ 11”

Question 12

At what level in the spray pond will the weir begin to overflow to the sump?

Answer 12

14’ 5”

Question 13

At what level in the spray pond will the control room receive a high level alarm?

Answer 13

14’ 8”

Question 14

If we lose makeup capabilities to the spray pond during a loss of coolant accident. What must we do at the spray ponds?

Answer 14

Open the cross tie valves (HCV-207 and HCV-208) and shutdown one train of emergency core cooling.

Question 15

What is the maximum Spray pond motor bearing temp?

Answer 15

194 degrees F

Question 16

What is the maximum design basis upper flow limit of the spray pond?

Answer 16

17,950 gpm

Question 17

Design basis temperature for spray pond?

Answer 17

113 degrees F

Question 18

Explain the re-circulation pump skid

Answer 18

3 pumps. One for each pond. And one that can be aligned to either pond.

Question 19

What are the three flow rates that we can put hypo in?

Answer 19

.25 gpm, .5 gpm, and 10 gpm

Question 20

When do we need to verify chemical injection to the spray pond by?

Answer 20

The verify operation should be checked 2 hours before and one hour after the scheduled trigger

Question 21

When we are using the 10 gpm hypo injection path; what can’t we do? Why?

Answer 21

We can’t run a Spray pond pump. Because the high concentration of hypo can cause increased corrosion in the DG equipment and EW HX.

Question 22

What chemical that we add can’t be added unless the spray pond pump is running?

Answer 22

CCI

Question 23

What are the requirements to add dispersant?

Answer 23

Either the spray pond pump or spray pond filter pump must be running

Question 24

What are the requirements to add sulfuric acid?

Answer 24

The spray pond filter pump must be running

Question 25

How many spray headers go into the spray pond?

Answer 25

four

Question 26

When will we get a hi discharge pressure alarm on a running SP pump?

Answer 26

58 psig

Question 27

When will we get a lo discharge pressure alarm on a running SP pump?

Answer 27

47 psig

Question 28

At what spray pond temperature will we get an alarm in the CR?

Answer 28

85 degrees F

Question 29

What color in the spray pond is better to see?

Answer 29

Light blue is the best and dark green is the worse

Question 30

What are the chemicals added to the spray ponds?

Answer 30

- Hypochlorite - Biocide - Sulfuric Acid - Copper Corrosion inhibitor - Mild Steel corrosion inhibitor - Dispersant

Question 31

Where do the filter backwash sump pumps discharge to?

Answer 31

CW intake structure

Question 32

How long can the DG run loaded and unloaded without the spray pond available.

Answer 32

2.6 min loaded | 15 min unloaded

Question 33

What happens to the spray pond system on a lose of IA?

Answer 33

CR loses ability to see level. Have to verify locally

Question 34

How many headers and risers are in the spray pond?

Answer 34

4 headers 20 risers each 320 nozzles

Question 35

How is it determined which makeup source that we use?

Answer 35

Chemistry through the CCI.

Question 36

Where can the Spray Pond pumps be started from?

Answer 36

CR or in the class switchgear room

Question 37

What automatically starts a spray pond pump?

Answer 37

- SIAS - CSAS - AFAS 1/2 - LOP - CRVIAS - CREFAS

Question 38

What are the spray pond corrosion test racks used for?

Answer 38

installed to monitor the corrosive effects of the spray pond water on piping and the HX's

Question 39

Where do the spray pond chemical injection pumps discharge to?

Answer 39

A "quill" that creates turbulent flow to mix with the recirc flow and dispense to the spray ponds

Question 40

What do the Spray pond recirc pumps do?

Answer 40

circulate water through the injection quill and back to the spray ponds. Any pump can go to either pond

Question 41

What is the essential spray ponds systems mission time?

Answer 41

30 days.

Question 42

Why is dispersant added to the spray pond?

Answer 42

Scale and deposit control

Question 43

Why is cooper corrosion inhibitor added to the spray pond?

Answer 43

Prevent corrosion. Added only when SP pump is running.

Question 44

Why is Sulfuric acid add to the spray pond?

Answer 44

pH control

Question 45

Why is Hypo added to the spray pond?

Answer 45

Biological growth