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

What are the Cntmt Temp bands? [T.S. 3.6.5]

Answer 5

• Upper 60°F-100°F
• Lower 60°F-120°F
  Basis:
• HI Temp Limit - equipment concerns
• Low Temp Limit - more mass still remain < 12#

Question 6

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

Answer 6

• Yes

Question 7

If Divider Barrier Seal Integrity is lost how long do you have to get it back? (TS 3.6.13 A)

Answer 7

• One or more personnel access doors or equipment hatches open or inoperable
  WITHIN 1 HR:
• restore to OPERABLE and closed

Question 8

If the Cntmt Recirc Drains are INOP how long do you have to restore them? (TS 3.6.14)

Answer 8

• Within 1 Hr

Question 9

What causes a Cntmt Phase A Isolation?

Answer 9

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

Question 10

What causes a Cntmt Phase B Isolation?

Answer 10

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

*Energize to Operate

Question 11

What does TS 3.6.2 A (Airlock) State?

Answer 11

1.One or more ctmnt air locks with one or more cmnt air lock doors inoperable
WITHIN 1 HR:
- Verify the Operable door is closed in the affected air lock

Question 12

What does TS 3.6.1 A (Ctmnt) State?

Answer 12

• If Ctmnt becomes inop
  WITHIN 1 hr
• restore to operable

Question 13

How many Refueling Canal Drains must be operable?

Answer 13

• 2 of 3

Question 14

How are the Refueling Canal Drains sized?

Answer 14

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

Question 15

What does TS 3.6.3 B (Ctmnt Isolations) State?

Answer 15

• If 1 or more ctmnt penetrations/flowpaths are inop
  WITHIN 1 HR:
• Isolate flow path

Question 16

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

Answer 16

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

Question 17

What does TS 3.6.2 B (Airlock) State?

Answer 17

• One or more ctmnt air locks with ctmnt air lock interlock mechanism inoperable
  WITHIN 1 HR:
• Verify an Operable door is closed in the affected air lock

Question 18

What does TS 3.6.2 C (Airlock) State?

Answer 18

• One or more ctmnt air locks inoperable for reasons other than Condition A or B
  IMMEDIATELY:
• Initiate action to evaluate overall ctmnt leakage rate per LCO 3.6.1
  AND
  WITHIN 1 HR
• Verify a door is closed on the affected air lock

Question 19

What does TS 3.6.4 A (Ctmnt #) State?

Answer 19

- Containment pressure not within limits -1.5 < # < +0.3
WITHIN 1 HR
- Restore ctmnt # to within limits
BASIS:
- High Limit 
   Keeps us below design limit of 12#
- Low Limit
   Ensures that the design neg diff pressure is not exceeded

Question 20

What does TS 3.6.12 A (Ice Condenser Doors) State?

Answer 20

• One or more condenser inlet doors inoperable due to being physically restrained from opening
  WITHIN 1 HR
• Restore inlet doors to operable status

Question 21

What does TS 3.6.13 B (Divider Barrier) State?

Answer 21

• Divider Barrier Seal INOP
  WITHIN 1 HR:
• Restore to operable

Question 22

What does TS 3.6.14 A (Ctmnt Recirc Drains) State?

Answer 22

• One ice condenser floor drain inoperable
  WITHIN 1 HR:
• Restore ice condenser floor drain to Operable status

Question 23

What does TS 3.6.14 B (Ctmnt Recirc Drains) State?

Answer 23

• One required refueling canal drain inoperable
  WITHIN 1 HR:
• Restore required refueling canal drain to Operable status

Question 24

What does TS 3.6.14 C (Ctmnt Recirc Drains) State?

Answer 24

• One required CEQ fan room drain inoperable
  WITHIN 1 HR:
• Restore required CEQ fan room drain to Operable status

Question 25

What does TS 3.6.14 D (Ctmnt Recirc Drains) State?

Answer 25

- One flood-up overflow wall flow path inoperable WITHIN 1 HR: - Restore flood-up overflow wall flow path to Operable status

Question 26

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

Answer 26

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

Question 27

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

Answer 27

- 1 p/sf

Question 28

Which radiation monitors close inside ctmnt isolation valves?

Answer 28

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

Question 29

Which radiation monitors close outside ctmnt isolation valves?

Answer 29

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

Question 30

What are the RCS leak detection monitors in ctmnt?

Answer 30

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)

Question 31

Where are the requirements for the containment Leak rate testing program (SR 3.6.1.1 and SR 3.6.2.1) discussed?

Answer 31

- Section 5.5.14 describes the containment leakage rate testing program - 0.18% of containment air weight per day - Peak # < 12#