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Question 1

What is the SSF designed to do?

Answer 1

Get both units to Mode 3 and hold for three days and then do a shutdown to Mode 5 with damage control measures.

Question 2

What events is the SSF designed for?

Answer 2

Fire
Security events
Loss of all AC power

Question 3

What actions must be accomplished before SSF is activated?

Answer 3

• Reactor is tripped
• Turbine is tripped
• All NC Pumps are tripped
• All Main Feedwater (CF) Pump Turbines are tripped

Question 4

The SSF underground fuel storage tank is sized to operate the SSF D/G for how long?

Answer 4

3 days

Question 5

In the “EMERG” mode of operation, which SSF D/G trips are bypassed?

Answer 5

• low lube oil pressure
• high jacket water temperature trips

Question 6

Which SSF D/G trips does the Overspeed Shutdown Bypass Switch bypass?

Answer 6

• Overspeed
• SSF D/G differential trips

Question 7

If the Fuel Oil Solenoid Manual Override is engaged, are any SSF D/G trips active?

Answer 7

No, while engaged all automatic and manual D/G trips are disabled.

Question 8

What are the SSF D/G trips in the “Test” mode?

Answer 8

• High jacket water temp - Engine out temperature of ≥ 210 °F
• Low lube oil pressure trip - ≤ 15 psig
• Engine overspeed
• Generator differential

Question 9

What are the SSF D/G trips in the “EMERG” mode?

Answer 9

• Engine overspeed
• Generator differential

Question 10

Where does 1SLXG get normal power from?

Answer 10

1TA switchgear

Question 11

From the SSF, what controls are available for Primary Side Volume Control?

Answer 11

• Charging - Standby make-up pump (18 gpm for seals, 8 gpm for NC make-up)
• Letdown - Reactor vessel Head vents (NC-250A and NC-253A)

Question 12

From the SSF, what controls are available for Primary Side Pressure Control?

Answer 12

Sub Bank of “D” PZR heaters

Question 13

Per SLC 16.7-9 Standby Shutdown System (SSS) what is the required capacity for the sub bank of “D” Pzr heaters?

Answer 13

Greater than or equal to 63.5 kW measured at motor control center SMXG

Question 14

Per SLC 16.7-9 Standby Shutdown System (SSS) what is the required capacity for SSF D/G fuel storage tank level?

Answer 14

Greater than or equal to 67 inches

Question 15

From the SSF, what controls are available for Secondary Side Pressure Control?

Answer 15

S/G safeties

Question 16

From the SSF, what controls are available for Secondary Side Volume Control?

Answer 16

CAPT

Question 17

What S/G level at the SSF will fail open SA-5?

Answer 17

2 out of 4 S/G WR level less than 45%.

Question 18

What are the methods for controlling S/G level at the SSF panel?

Answer 18

• Preferred - Stop and start CAPT #1(2) by depressing the ‘ON’ and ‘OFF’ switch for the steam supply valve 1(2) SA-5
• Start and stop CAPT #1(2) by pressing “OPEN” or “CLS/TRIP” on the switch “CAPT #1(2) TRIP T/V CTRL”

**The use of CAPT #1(2) Trip Throttle valve shall only be as a last resort. If it is used to start the pump, there is a possibility that CAPT #1(2) will overspeed.

Question 19

What secondary system valves automatically close when control is transfer to the SSF?

Answer 19

• S/G blowdown containment isolations
• Main steam isolations
• S/G PORVs
• CF containment isolation bypasses
• S/G tempering isolations

Question 20

What valves automatically open when control is transfer to the SSF?

Answer 20

• CAPT CA flow control valves
• “C” S/G CA motor operated isolation

Question 21

How many Incore thermocouples are used at the SSF?

Answer 21

5

Question 22

When must the sub bank of “D” PZR htrs be energized to ensure a PZR bubble remains in the PZR.

Answer 22

• Within 15 hours of using the SSF with Containment Ventilation system (VV) in operation,
  or
• Within 50 hours with VV not in operation

Question 23

To limit flooding of the CAPT in the CA pump room, RN must be secured with how many minutes?

Answer 23

35 minutes

Question 24

Per SLC 16.7-9 Standby Shutdown System (SSS) what is the required action if A required cell in a 24-Volt battery bank is < 1.36 volt on float charge?

Answer 24

Immediately declare the SSF nun-functional