SFP cooling and cleanup system

Question 1

Single train of SFP cooling designed to maintain _____F after ____ core offload. CC temp assumed _____F.

Answer 1

<=145.2F
1/3
<=105F

Question 2

Single train maintains _____F after one full core offload.

Answer 2

<=165.3F

Question 3

Both trains will maintain _____F following back to back refuelings, 1/3 of one core and full core from other unit.

Answer 3

<=141F

Question 4

Minimal water level of ______ above fuel ensures sufficient depth to remove _____.

Answer 4

23’
99% of assumed 10% iodine gap activity from rupture of an irradiated fuel assembly.

Question 5

SFP boron concentration _____ ppm.

Answer 5

> =300 ppm

Question 6

Minimum water depth of ____ above the top of fuel during moves will ensure _____ mrem/hr.

Answer 6

9’
4 mr/hr

Question 7

SFP hi water alarm temp ____
Cooling placed in service____
RP to start monitoring for AA___

Answer 7

149F
120F
95F

Question 8

What cools the SFP HXs?

Answer 8

CC

Question 9

Power supplies

Answer 9

U1 SFP 134X
U2 SFP 234X
Skimmer 134V
0A Purification 132X
0B Purification 131X

Question 10

SFP Level Low alarm

SFP Level High alarm

Answer 10

424’2”

424’9.5”

Question 11

U1 side leak detection locations

U2 side leak detection locations

Answer 11

1. U1 transfer canal
   SW corner of SFP
   Failed fuel region
   SE corner of SFP
2. NE corner of SFP
   NW corner of SFP
   U2 transfer canal

Question 12

How is dewatering of SFP prevented?

Answer 12

1. Suction <7’ below norm. water lvl
2. Anti-siphon on disch. 4” below h20
3. Disch.line stops 6’ > fuel
4. Sluice gate drops lvl only 6’10” if opened, still 18’8” >fuel
5. Leak detection system on seams
6. MCB level alarm
7. No drains in SFP