Spray Ponds Flashcards
The design basis for the Ultimate Heat Sink requires sufficient cooling for a period of ______ without water makeup to cool down the unit and maintain it in a safe condition under the most adverse historical meteorological conditions.
26 days
One of the design bases of the Spray Pond (Ultimate Heat Sink)is to provide sufficient cooling for a period of ____ days without _________ to cool down the unit and maintain it in a safe condition under the most adverse historical meteorological conditions.
26, water makeup
12’ is the water volume that would be depleted over 26 days following a design basis LOCA if no makeup were available.
What components does the Spray Pond system cool?
- EW heat exchangers
- DG heat exchangers:
- lube oil cooler
- fuel oil cooler
- turbocharger
- discharge air intercoolers
- jacket water cooler.
The minimum spray pond level for spray pond pump operation (NPSH) is _____ and the Tech Spec levels are _____for the control room indication and _____ locally
1’ 6”
14’0”
13’6” (12’ plus 1’6” for NPSH)
The 12’ is the water volume that would be depleted over 26 days following a design basis LOCA if no makeup were available.
Each spray pond has ______ spray headers with ______risers. Each riser has _____ nozzles for a total of _____ nozzles per pond.
4, 20, 4, 320
State the conditions that will auto start the spray pond pumps.
- Diesel Generator running
- SIAS or CSAS
- CREFAS
- CRVIAS
- AFAS
- LOP
The spray pond pump house exhaust fan starts when when the pump is started and it turns off ___ minutes after the pump is stopped.
5
When securing a spray pond filter pump, what must be done prior to stopping the pump and why?
You must close the pump discharge valve prior to securing the pump to ensure that the pump casing does not drain back to the pond and necessitate extensive priming of the pump when a start is desired.
An area operator is performing a spray pond filter backwash and gets distracted and leaves without securing the backwash. What will happen to spray pond level with no further action?
a. The level will stop lowering at 13’11” when the backwash valves will auto close on a low spray pond level signal
b. The level will lower until the the filter pump trips at a spray pond level of 13’7.5”
c. The level will lower continuously unless action is taken
d. The level will initially decrease until automatic DS makeup actuates at 13’11”
b
The filter pump will automatically restart when the low level signal clears.
Which one of the following is NOT an analysis performed by chemistry on the spray ponds?
a. Zinc
b. Phosphates
c. Chlorine
d. Silica
b
The analyses performed are : Chlorine Silica Zinc MBA - microbiological activity Conductivity Radioactivity
The chemicals added to the spray ponds to kill bacteria and reduce bacteria related corrosion are ______ and _______.
sodium hypochlorite (chlorine) and biocide
______ acid is added to the spray ponds to lower pH as needed:
a. Sulfuric
b. Muriatic
c. Hypochloric
d. Boric
a
Regarding the two make sources to the Spray Pond System, _____ makeup has more calcium, but less biological activity.
A) TB, Cooling Tower Makeup and Blowdown System
B) DS, Domestic Water System
C) DW, Demineralized Water System
D) PW, Plant Cooling Water System
B) DS, Domestic Water System
Isolating which of the following Spray Pond System ‘A’ components will result in Spray Pond Inoperability per Tech. Spec. 3.7.8?
A) ‘A’ DG Jacket Water Cooler
B) Spray Pond Backwash Filters
C) All Diesel Generator Coolers on ‘A’ Train
D) ‘A’ Essential Cooling Water Heat Exchanger (Spray Pond side ONLY)
D) ‘A’ EW Heat exchanger
According to the bases for LCO 3.7.9, the Ultimate Heat Sink temperature should no exceed \_\_\_\_ degrees F and the level of each Essential Spray Pond should not fall below \_\_\_\_\_ feet usable water depth during normal operation. A) 98, 12.0 B) 89, 12.0 C) 89, 13.5 D) 98, 13.5
B) 89F, 12.0 ft
