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1. Systems > Ctrl Room Ventilation > Flashcards

Ctrl Room Ventilation Flashcards

1
Q

What is the purpose of the Ctrl Rm Ventilation?

A
  • Maintain control room below 120°F during 4 hour coping period of Station Blackout
  • Maintain normal temp less than 85°F
  • Keep CR pressurized
  • Maintain acceptable smoke levels in CR
  • Keep temperature in CR less than 97 deg F during accident
  • Remove iodine and particulate
  • Maintain rad levels during DBA less than 5 Rem
  • Isolate CR during toxic gas release
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2
Q

How does ESW interface with the CRAC?

A
  • Cooling water for condensers

- Backup supply for cooling coils

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3
Q

When is the backup cooling capability lost with respect to ESW to the cooling coils?

A
  • Backup capability lost if ESW > 65°F
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4
Q

What are the CR Pressurization Fan starts?

A
  • SI in either Unit (Train Spec)
  • CR High Rad (unit specific)
  • CRCV Fire (CO2 or Halon actuation)
  • Manual
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5
Q

What the trips of the CRAC chiller package?

A
  • Load Con**
  • High Discharge Pressure
  • Low Suction Pressure
  • Low Temperature
  • Low Oil Pressure
  • Overload
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6
Q

How do VRV-315/325 fail on a loss of air?

A
  • Fail open with full flow to chillers

(ACRDA are motor operated and fail as is on loss of pwr)**

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7
Q

Describe a design function of the Control Room Ventilation System?

A
  • Maintains control room habitable for 30 days post accident while maintaining dose less than 5 rem TEDE to satisfy 10 CFR 50.36
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8
Q

If U-1 gets a CRCV Fire signal and All U-1 CR Vent Sys Auto actions occur as expected
THEN
U-1 gets a CR High Rad signal,
Does U-1 CR vent Sys realign?

A
  • No, “First in Wins.” The U-1 CR Vent System stays aligned for the U-1 CRCV Fire signal
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9
Q

When will HV-ACR-DA-2A Clean Up Intake Damper

HV-ACR-DA-2A go to part open?

A

-If HV-ACR-DA-2 isn’t in part open after 45 sec since actuation

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10
Q

What does TS 3.3.7 B (CREV system Actuation Instrumentation) State?

A
  • If One or more required functions with two trains inoperable
    IMMEDIATELY:
  • Place one CREV train in pressurization/cleanup mode
    AND
  • Enter applicable Conditions and Required Actions for 1 CREV train made Inoperable by Inoperable CREV actuation instrumentation
    OR
  • Place both CREV trains in pressurization/cleanup mode
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11
Q

What does TS 3.7.10 B (CREV system) State?

A
  • If 1 or more CREV trains Inoperable due to CRE Boundary in Modes 1-4
    IMMEDIATELY:
  • Initiate action to implement mitigating actions
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12
Q

What does TS 3.7.10 F (CREV system) State?

A
  • If 2 CREV trains inoperable during movement of irradiated fuel assemblies
    OR
  • 1 or more CREV trains inoperable due to an inoperable CRE boundary during movement of irradiated fuel assemblies
    IMMEDIATELY:
  • Suspend movement of irradiated fuel assemblies
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13
Q

What does TS 3.7.10 G (CREV system) State?

A

If 2 CREV trains inoperable in Modes 1,2,3,4 for reason other than B (CRE Boundary) and C (filter)
IMMEDIATELY:
- Enter LCO 3.0.3

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14
Q

What does TS 3.7.11 D (CRAC system) State?

A
  • If 2 CRAC trains Inoperable during movement of irradiated fuel assemblies
    IMMEDIAELY:
  • Suspend movement of irradiated fuel assemblies
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15
Q

What does TS 3.7.11 E (CRAC system) State?

A

If 2 CRAC trains inoperable
IMMEDIATELY:
- Enter LCO 3.0.3

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16
Q

What is the makeup source to chilled water loops and humidifiers?

A

Demin water

17
Q

What is the normal position of the control room dampers

A
  • 1/1A (CRAC outside supply): OPEN
  • 2/2A (CREV outside supply): CLOSED
  • 3 (CREV recirc): OPEN
18
Q

What is the position of the control room dampers for a toxic gas release

A
  • 1/1A (CRAC outside supply): CLOSED
  • 2/2A (CREV outside supply): CLOSED
  • 3 (CREV recirc): CLOSED
19
Q

What is the position of the control room dampers for a cable vault fire

A
  • 1/1A (CRAC outside supply): CLOSED
  • 2/2A (CREV outside supply): PARITALLY OPEN
  • 3 (CREV recirc): CLOSED
20
Q

What is the position of the control room dampers for a high rad alarm

A
  • 1/1A (CRAC outside supply): CLOSED
  • 2/2A (CREV outside supply): PARTIALLY OPEN
  • 3 (CREV recirc): OPEN
21
Q

What is the position of the control room dampers for an SI in either unit

A
  • 1/1A (CRAC outside supply): CLOSED
  • 2/2A (CREV outside supply): PARTIALLY OPEN
  • 3 (CREV recirc): OPEN
22
Q

For toxic gas, do the dampers align automatically or manually

A

Manual

23
Q

What are the rad monitor numbers that actuate CREV for each unit

A
  • 7401 (U1)

- 8401 (U2)

1. Systems (56 decks)

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