LOT 202.01 S/G

Question 1

• LOT 202.01 S/G*
• • *

What is the minimum Rx power that the SGs can be fed through the main feed nozzle?

Answer 1

4%

Prevents thermal stratification at low feedwater flows

Note:
Cannot use main feed when RCS temperature < 340 ˚F.

Question 2

• LOT 202.01 S/G*
• • *

What is the quality of steam the SGs will provide to the secondary?

Answer 2

99.9% Quality

First stage moisture separator: 18 Swirl Vanes

Second stage moisture separator: 6 dryers (Torturous Path)

Question 3

• LOT 202.01 S/G*
• • *

How many level, pressure, and steam flow instruments are there per S/G?

Answer 3

• Level:*
• *4 Narrow Range**
• 2 NR on CP006*
• Selected Level on CP006 Recorder*
• *1 Wide Range**
• Recorder on CP018*
• ASP*
• Steam Pressure:*
• *4 SG Pressure**
• 2 SG Pressures on CP006*
• Steam Flow:*
• *2 Steam Flow**
• Both on CP006*
• Selected Flow on CP006 Recorder*

Question 4

• LOT 202.01 S/G*
• • *

When will AMSAC trip the turbine?

Answer 4

SGNR Level ≤ 15% [1/1 on 3/4] [25 sec TD]

Question 5

• LOT 202.01 S/G*
• • *

When will the SG Safeties lift?

Answer 5

1285 psig ± 3%

1295 psig ± 3%

1305 psig ± 3%

1315 psig ± 3%

1325 psig ± 3%

• Limits SG pressure to 110% (1413.5 psig) of design pressure (1285 psig) during most severe system transient.
• Located in IVC 58’

Note:
Relieves to atmosphere (Roof)

Question 6

• LOT 202.01 S/G*
• • *

What is the maximum D/P between the primary and secondary?

Answer 6

• Primary → Secondary:*
• *1600 psig**
• Secondary → Primary:*
• *670 psig**

Question 7

• LOT 202.01 S/G*
• • *

What are the the DBAs for the SG PORVs?

Answer 7

Small Break LOCA

Feedwater break

Loss of Feedwater

LOOP

Question 8

• LOT 202.01 S/G*
• • *

What is the normal level and pressure of the SGs?

Answer 8

• SGNR Level:*
• *70.7%**
• Full Load Pressure:*
• *1050 psig**
• No Load Pressure:*
• *1185 psig**

Question 9

• LOT 202.01 S/G*
• • *

What is the purpose of the outlet flow restrictor?

Answer 9

• *Restricts blowdown of S/G during SLB****
• Safety Function*
• *Develops steam flow signal**
• Normal Operations*

• Limit primary cooldown rate
• Limit stress on the S/G internals

Question 10

• LOT 202.01 S/G*
• • *

If the primary or secondary is ≥ 200 psig, what must the temperature of the SG be?

Answer 10

≥ 70 ˚F

TRM 3.7.2 SG Pressure/Temp Limitation
Applicability: All times

Question 11

• LOT 202.01 S/G*
• • *

What is on the ASP for the SG system?

Answer 11

Wide Range Level

PORVs

Question 12

• LOT 202.01 S/G*
• • *

When will the SG PORVs lift?

Answer 12

1225 psig (± 7 psig)

• Used to Cooldown plant when condenser not available
• All four PORVs together have capacity of 25% (6.25% each)
• Located in IVC 58’

Note:
Relieves to atmosphere (Roof)