Containment Flashcards

1
Q

What are the functions of Containment?

A
  • Limits the release of fission products
  • Provides biological shielding.
  • Provides source of water for recirc
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2
Q

What is the purpose of the Divider Barrier seal?

A
  • prevents flow of steam and air from bypassing the ice condenser
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3
Q

What actuates a Cntmt Vent Isolation [CVI]?

A
  • High Radiation
  • SI (1# in Lower Ctmnt)
  • Manual Phase A switch
  • Manual phase B switch
  • Manual
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4
Q

What Hydrogen concentration do the Hydrogen Recombiners maintain?

A

< 4%

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5
Q

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

A
  • Upper 60°F-100°F
  • Lower 60°F-120°F
    Basis:
  • HI Temp Limit - equipment concerns
  • Low Temp Limit - more mass still remain < 12#
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6
Q

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

A
  • Yes
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7
Q

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

A
  • One or more personnel access doors or equipment hatches open or inoperable
    WITHIN 1 HR:
  • restore to OPERABLE and closed
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8
Q

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

A
  • Within 1 Hr
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9
Q

What causes a Cntmt Phase A Isolation?

A
  • SI (1# in Lower Ctmnt)
  • Manual
  • If manually actuated, Causes CVI
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10
Q

What causes a Cntmt Phase B Isolation?

A
  • 2.8# in Lower Ctmnt
  • Manual
  • If manually actuated, Causes CVI
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11
Q

What does TS 3.6.2 A (Airlock) State?

A

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

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12
Q

What does TS 3.6.1 A (Ctmnt) State?

A
  • If Ctmnt becomes inop
    WITHIN 1 hr
  • restore to operable
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13
Q

How many Refueling Canal Drains must be operable?

A
  • 2 of 3
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14
Q

How are the Refueling Canal Drains sized?

A
  • Sized to allow sufficient flow back to the recirculation sump and minimize steam bypassing the Ice Condenser
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15
Q

What does TS 3.6.3 B (Ctmnt Isolations) State?

A
  • If 1 or more ctmnt penetrations/flowpaths are inop
    WITHIN 1 HR:
  • Isolate flow path
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16
Q

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

A
  • All access hatches through barrier are closed when RCS > 200°F
17
Q

What does TS 3.6.2 B (Airlock) State?

A
  • 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
18
Q

What does TS 3.6.2 C (Airlock) State?

A
  • 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
19
Q

What does TS 3.6.4 A (Ctmnt #) State?

A
- 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
20
Q

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

A
  • One or more condenser inlet doors inoperable due to being physically restrained from opening
    WITHIN 1 HR
  • Restore inlet doors to operable status
21
Q

What does TS 3.6.13 B (Divider Barrier) State?

A
  • Divider Barrier Seal INOP
    WITHIN 1 HR:
  • Restore to operable
22
Q

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

A
  • One ice condenser floor drain inoperable
    WITHIN 1 HR:
  • Restore ice condenser floor drain to Operable status
23
Q

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

A
  • One required refueling canal drain inoperable
    WITHIN 1 HR:
  • Restore required refueling canal drain to Operable status
24
Q

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

A
  • One required CEQ fan room drain inoperable
    WITHIN 1 HR:
  • Restore required CEQ fan room drain to Operable status
25
What does TS 3.6.14 D (Ctmnt Recirc Drains) State?
- One flood-up overflow wall flow path inoperable WITHIN 1 HR: - Restore flood-up overflow wall flow path to Operable status
26
Why do we use Sodium Tetra-borate in the ice in the ice condenser?
- To keep iodine in solution post accident (keeps water at high pH)
27
How much pressure is needed to open the lower deck doors to the ice condenser?
- 1 p/sf
28
What does Ctmnt Penetrat. and Channel Press. System do for us and which one is still in service?
- Zone 3, Electrical Penetrations and the system maintains positive pressure on the containment electrical penetrations to prevent moisture intrusion.
29
Which radiation monitors close inside ctmnt isolation valves?
- Odd numbered Radiation monitors close 100 series (inside ctmnt iso valves) and CIPS Fan
30
Which radiation monitors close outside ctmnt isolation valves?
- Even numbered Radiation monitors close 200 series (Outside ctmnt iso valves) and rest of Ctmnt Vet Supply Fans
31
What are the RCS leak detection monitors in ctmnt?
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)
32
Where are the requirements for the containment Leak rate testing program (SR 3.6.1.1 and SR 3.6.2.1) discussed?
- Section 5.5.14 describes the containment leakage rate testing program - 0.25% of containment air weight per day - Peak # < 12#