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RO31 ILT > Containment > Flashcards

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
Q

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

A
  • One flood-up overflow wall flow path inoperable
    WITHIN 1 HR:
  • Restore flood-up overflow wall flow path to Operable status
26
Q

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

A
  • To keep iodine in solution post accident (keeps water at high pH)
27
Q

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

28
Q

What does Ctmnt Penetrat. and Channel Press. System do for us and which one is still in service?

A
  • Zone 3, Electrical Penetrations and the system maintains positive pressure on the containment electrical penetrations to prevent moisture intrusion.
29
Q

Which radiation monitors close inside ctmnt isolation valves?

A
  • Odd numbered Radiation monitors close 100 series (inside ctmnt iso valves) and CIPS Fan
30
Q

Which radiation monitors close outside ctmnt isolation valves?

A
  • Even numbered Radiation monitors close 200 series (Outside ctmnt iso valves) and rest of Ctmnt Vet Supply Fans
31
Q

What are the RCS leak detection monitors in ctmnt?

A
  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
Q

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

A
  • Section 5.5.14 describes the containment leakage rate testing program
  • 0.25% of containment air weight per day
  • Peak # < 12#

RO31 ILT (56 decks)

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