VFS(2) - Containment Air Filtration

Simplified Diagram

Containment Smoke Detectors

Where alarm?

VFS affect?

Fire panel alarm INSIDE control room area

NO PLS communication from Fire Panel to systems, VFS will NOT auto-trip based on fire panel

Response to “S”

VFS will trip at 5psig due to “T”

The 800 will open via hand switch if <0.1psig

This feature will Auto-Reset

*Hand switches in MCR and RSR

3.6.9

90°F delta

-0.8psig

800s will auto open at -0.8psig containment pressure

Fire Protection

Deluging the charcoal beds will auto-trip the Exhaust Fan (High Temp element)

Water that deluges beds will be contained and directed to WRS

Refresher

DAS Critical Containment Isolation

• CVS L/D (CVS-V045/V047) 

• CTMT Purge Inlet (VFS-V003/V004) 

• CTMT Purge Discharge (VFS-V009/V010) 

• Sump Discharge CTMT Isol (WLS-V055/V057)

VFS

Supply Fan Overview

Stop signals?

Power Supplies?

Location?

Can be MANUALLY loaded onto SDGs

Trip on 2R/hr

VFS

AHU Isolations Intake/Discharge

Behavior?

Fail Position?

Fail CLOSED

VFS

Containment Supply CIV AOVs

VFS-V003/V004

VFS

Containment Return CIV AOVs

VFS-V009/V010

VFS

Containment Vacuum Relief CIV MOVs

VFS-V800A/B

VFS

Containment Vacuum Relief CIV Checks

VFS-803A/B

Designed to lift at 0.2psid

Located INSIDE Cont.

*Notice Piping Design, with a DAS Critical Containment Isolation (V009 and V010 isolated) Containment still has implosion protection

VFS

Fuel Handling Area, Auxiliary, Annex Dampers

D016/018/020

Fail CLOSED

Open: High Rad OR Low-2 dP with Time Delay

VFS

Containment AFUs (MS-02A/B)

VFS

Train Configuration Interlock

Alpha is boss

Building shift Logic