Containment

Question 1

What are the functions of Containment?

Answer 1

• Limits the release of fission products
• Provides biological shielding.
• Provides source of water for recirc

Question 2

What is the purpose of the Divider Barrier seal?

Answer 2

• prevents flow of steam and air from bypassing the ice condenser

Question 3

What actuates a Cntmt Vent Isolation [CVI]?

Answer 3

• High Radiation (Upper: VRS1100/1200, Lower: ERS1300/1400)
• SI (1# in Lower Ctmnt)
• Manual Phase A switch
• Manual phase B switch
• Manual

Question 4

What Hydrogen concentration do the Hydrogen Recombiners maintain?

Answer 4

< 4%

Question 5

Can you enter Ctmnt doors to do repairs if you are in the TS for doors being inop?

Answer 5

• Yes

Question 6

What causes a Cntmt Phase A Isolation?

Answer 6

• SI (1# in Lower Ctmnt) 2/3 channels
• Manual
• Closes Phase A isolations
• If manually actuated, Causes CVI

Question 7

What causes a Cntmt Phase B Isolation?

Answer 7

• 2.8# in Lower Ctmnt 2/4 channels
• Manual
• Closes Phase B isolations
• If manually actuated, Causes CVI

*Energize to Operate

Question 8

How many Refueling Canal Drains must be operable?

Answer 8

• 2 of 3

Question 9

How are the Refueling Canal Drains sized?

Answer 9

• Sized to allow sufficient flow back to the recirculation sump and minimize steam bypassing the Ice Condenser

Question 10

When are all access hatches through the barrier closed in Ctmnt?

Answer 10

• All access hatches through barrier are closed when RCS > 200°F

Question 11

Why do we use Sodium Tetra-borate in the ice in the ice condenser?

Answer 11

• To keep iodine in solution post accident (keeps water at high pH)

Question 12

How much pressure is needed to open the lower deck doors to the ice condenser?

Answer 12

• 1 p/sf

Question 13

Which radiation monitors close inside ctmnt isolation valves?

Answer 13

• Odd numbered Radiation monitors close 100 series (inside ctmnt iso valves) and CIPS Fan

Question 14

Which radiation monitors close outside ctmnt isolation valves?

Answer 14

• Even numbered Radiation monitors close 200 series (Outside ctmnt iso valves) and rest of Ctmnt Vet Supply Fans

Question 15

What are the RCS leak detection monitors in ctmnt?

Answer 15

1. Humidity (Dew Point)
2. Sump Flows (Sump Pump Run Time Meters)
3. Radiation Monitors (Gaseous and Particulate)

• –> Unit 1 combines Humidity and Gaseous Rad Waste. Particulate is a sole rad monitor
• –> Unit 2 combines Radiation Monitors (Gaseous and Particulate)