SFP

Question 1

What are the SFP Pump trips?

Answer 1

• Load Shed
• Load Conservation
• Overload/Overcurrent

Question 2

Per TS 3.7.15 (Fuel Storage Pool Boron Concentration), what is the boron concentration required in the SFP?

Answer 2

≥ 2400 ppm

Question 3

Per TS 3.7.14 (Fuel Storage Pool Water Level), what is the minimum water level allowed in the SFP?

Answer 3

23’ above top of fuel (Basis: Iodine removal)

Question 4

What are the power supplies for the SFP Pumps?

Answer 4

11C for North SFP Pump
21C for South SFP Pump

Question 5

How do we keep from inadvertently draining the SFP?

Answer 5

No Gravity Drains
SFP Pp Suctions 19.5” below surface
Anti-Siphon Holes 4” below surface
Skimmers 6” below surface
Return Lines > 6’ above fuel

Question 6

Per TS 3.7.14 A (Fuel Storage Pool Water Level), what is done if the level requirement is not met?

Answer 6

IMMEDIATELY
-Suspend fuel movement

Question 7

Per TS 3.7.15 A (Fuel Storage Pool Boron Concentration), what must be done if the boron concentration is out of spec?

Answer 7

IMMEDIATELY
- Suspend movement of fuel
AND
- Initiate action to restore compliance
OR
- Initiate action to perform fuel storage pool verification

Question 8

What is a secondary function of the SFP system?

Answer 8

clarify and purify the water in the SFP, transfer canal, and purify the RWST

Question 9

Where do SFP discharge lines terminate and what do they do to prevent siphoning?

Answer 9

Discharge lines terminate no lower than 6’ above the top of the fuel assemblies and anti-siphon holes are located 4” below normal level

Question 10

What happens to SFP Cooling on a Phase ‘A’?

Answer 10

CCW to the SFP HX Isolates

Question 11

If U1 is providing cooling to the SFP Hx and has a SI, what happens?

Answer 11

U2 will need to align cooling through the South Pump

assumes a Phase A signal is also generated

Question 12

What trips a Refueling Water Purification Pump (RWPP)?

Answer 12

Load Conservation

Question 13

Core Alterations are in progress on Unit 2. RCS boron concentration has been verified to be 2360 ppm (two samples analyzed).
The crew is required to …

Answer 13

Suspend core alterations and positive reactivity changes. Initiate boration to correct.

Question 14

What provides inflation air to the SFP Weir Gate?

Answer 14

Plant Air system

Question 15

Will cross-tie of the SFP System through the purification piping prevent boiling?

Answer 15

No! Just delays it.

IF makeup is > 175 gpm in addition, MAYBE

Question 16

What are the important design features for the SF Racks and New Fuel Racks in regards to Reactivity IAW TS 4.3?

Answer 16

• **Keff ≤ 0.95 even with unborated water. (0.98 foam)
• ** 21” Center to center between fuel assemblies (new fuel racks)
• Nominal enrichment < 4.95% of U-235.

Question 17

How far does the suction for the SFP pumps terminate below the surface?

Answer 17

19”

Question 18

What is the primary source of heat production in the SFP?

Answer 18

Fission Products

Question 19

With the design features for the SFP, what level is the lowest possible?

Answer 19

Never below 629’4”

Question 20

Why is the minimum level of 23 ft above the fuel required per the bases?

Answer 20

To meet the assumptions of iodine DF follwoing a fuel handling accident