VF

Question 1

What is the purpose of the Fuel Handling Building Ventilation System?

Answer 1

Provides a safe environment in the Fuel Building to house nuclear fuel

Question 2

What are the VF Systems three principal purposes?

Answer 2

-Control fission product emissions following a fuel handling accident (The Only Safety Related Function).
-Maintain a suitable environment for the operation, maintenance, and testing of equipment.
-Maintain a suitable access and working environment for personnel

Question 3

In order to perform its safety related function, the VF system is capable of producing and maintaining what pressure?

Answer 3

A negative pressure of 0.25” w.g

Question 4

What is the unit difference when YV is aligned to cool the VF system?

Answer 4

-Unit 1, the YV supply is manually throttled to maintain the supply air temperature greater than or equal to 70°F.
-Unit 2 only, a thermostat controls the flow of the heating and cooling water supplies to maintain 60F at the outlet of the Supply Unit.

Question 5

What system supplies cooling what to the VF system?

Answer 5

YV

Question 6

When will VF be placed in filter mode?

Answer 6

-EMF-42 High Rad Trip 2 (Auto action)
-EMF-35, 36 High Rad Trip 2 (Auto action)
-VC-YC switch to “local” position (Auto action)
-For testing as required
-When EMF-42 is inoperable to comply with the associated SLC-16.7-10 action.

Question 7

How is the VF system affected by a safety injection?

Answer 7

The filter trains trip on LOCA sequencer actuation

Question 8

How is the VF system affected by a blackout signal?

Answer 8

-Exhaust fans are automatically restarted by a blackout sequencer signal. The train, which receives the start signal first, will start regardless of which train was previously running.

Question 9

What occurs in the VF system when the Local VC/YC “CONTROL ROOM/LOCAL” switch is placed in “LOCAL”?

Answer 9

VF filters receive a signal to align to the filtered mode.

Question 10

What is the purpose of the Tornado Isolation Dampers on the VF system?

Answer 10

Provides a pressure barrier to protect the Fuel Pool Building from the effects of a large tornado induced negative differential pressure

Question 11

Per TE-OP-CNS-0120 (SEVERE WEATHER PREPARATIONS), what two conditions would require shutting down the VF system?

Answer 11

Tornado warning
Hurricane

Question 12

Can both trains of VF run at the same time?

Answer 12

No, only one train will start due to interlock.

Question 13

What is the Mode of Applicability for LCO 3.7.13 Fuel Handling Ventilation Exhaust System (FHVES)?

Answer 13

During movement of recently irradiated fuel assemblies in the fuel building