Control room ventilation

Question 1

Starting interlocks
Supply____
Return____
Makeup___

Answer 1

Supply None
Return Supply fan running
Makeup 1. Supply fan running
2. Deluge valves not open

Question 2

Auto starts
Supply _____
Return _____
Makeup ____

Answer 2

Supply None
Return None
Makeup 1. SI 2. Hi rad (Red1/2) PR031/32A, 33/34-0B. RM operate failure 2/2 or Loss of 1/2 power supplies

Question 3

Trips
Supply ______
Return ______
Makeup _____

Answer 3

Supply 1. Fan Hi DP, 15 sec TD, 2. Deluge open, 3. Overcurrent
Return 1. Supply fan off, 2. Overcurrent
Makeup 1. Supply fan off, 2. Lo air flow (45 sec TD), 3. Deluge valve not closed, 4. Overcurrent

Question 4

High radiation signal, one of the following is required to actuate:
1.
2.
3.

Answer 4

1. High gaseous radiation on the control room outside air intake. Either 0PR31J or 32J train A/ 0PR33J or 34J train B.
2. Operate failure on both 31 and 32J or 33 and 34J.
3. Loss of power to one rad monitor

Question 5

A LOOP to ______ will result in the operating VC train restarting in ____.

Answer 5

141/142
Emergency M/U mode

Question 6

SI sequence

Answer 6

1. MU filter fan starts
2. MU filter fan outlet damper modulates open to control flow.
3. MU filter unit intake damper opens
4. Normal intake from outside closes
5. Recirc charcoal adsorber unisolates.
6. Both control room WO pps and chillers receive starts signals. U1 only
   Stby train chiller only starts if cw pump running.
7. Isolates purge dampers if open.

Question 7

SI to CR ventilation must be manually reset with _____ located_____.

Answer 7

by ESF reset PBs on PM06J to realign system.

Question 8

High radiation signal must be clear to realign dampers to normal postion. This is accomplished by ____.

Answer 8

No reset PBs, high radiation signal must be clear

Question 9

MU air bypass line used for ___, ____, or _____ in turbine building.

Answer 9

Fire, High rad, or HELB

Question 10

A single VC Temperature Control System train will
provide the required temperature control to maintain the
control room _______.

Answer 10

<=90F

Question 11

The design basis of the VC Temperature Control System is to
maintain the control room temperature for _____ of
continuous occupancy.

Answer 11

30 days

Question 12

What is the normal air supply for the makeup fan?

Answer 12

Turbine building

Question 13

What happens if CR purge in progress and a SI occurs?

Answer 13

Purge is terminated