CVCS (BAST, Makeup, and Transfer System)

Question 1

BASTs

Answer 1

• 2 tanks

- TRM requirement to have enough boric acid to borate to cold shutdown (>3080gal, 20,000-22,500ppm,>145F)

Question 2

A Boric Acid Transfer Pump, and 2 immersion heaters for each Storage Tank.
Power supplies?

Answer 2

• Tank A- MCC-5

- Tank B-MCC-6

Question 3

Modes of operations

Answer 3

• Automatic
• Borate
• Dilute
• Alternate Dilute

Question 4

MOV-350

Emergency Boration Vlave

Answer 4

• Powered by MCC-5
• Lines up BA pump directly to Charging Pump suction for Emergency Boratian
• normally 65gpm

Question 5

Heat Tracing power supplies and why?

Answer 5

• ITS min temp is 145F, boric acid starts to solidify

- Powered by MMC-6 or 5 (Primary/Secondary)

Question 6

Boric acid filter

Answer 6

• Located in CCW pump room
• Max dp is 20psid
• can be bypassed for cartridge replacement

Question 7

Batching tank and acid blender

Answer 7

• 2 floor aux building batch tank
• Blender promotes mixing of boric acid solution and primary water, shortens the pipe length required to homogenize the mixture. Located in CCW pump room

Question 8

Primary Water Pumps

Answer 8

• A-MCC-1

- B-MCC-2