LOT 202.18 Generator Seal Oil

Question 1

• LOT 202.18 Generator Seal Oil*
• • *

Where can the Seal Oil Pumps be operated from?

Answer 1

• *Locally (29’ TGB)**
• No controls for Seal oil pumps in MCR*

Question 2

• LOT 202.18 Generator Seal Oil*
• • *

What collects H₂ leakoff in the Generator Seal Oil System?

Answer 2

Defoaming Tanks

H₂ then drains to H₂ Receiver Tank

Question 3

• LOT 202.18 Generator Seal Oil*
• • *

When is Generator Seal Oil required to be in operation?

Answer 3

H₂ in the generator

Main Turbine shaft spinning

Question 4

• LOT 202.18 Generator Seal Oil*
• • *

What pressure does the Air Side Seal Oil Pump (ASSO) maintain the generator seal oil system normally operate at?

Answer 4

• *87 psig**
• 12 psig > than H₂ pressure (75 psig)*

Pressure equalizing valves maintain Air side and Oil side at the same pressure.

Question 5

• LOT 202.18 Generator Seal Oil*
• • *

What pressure does the HSSO D/P Regulator, ASSO D/P regulator, and the Turbine Backup Pressure Regulator maintain?

Answer 5

• ASSO D/P Regulator:*
• *12 psid**
• 5 psid starts DC Pump*
• Turbine (ASSO) Backup Pressure Regulator:***
• *8 psid**
• Supplied from Turbine LO*

Note:
If supplying air side seals from the BOP in the TGLO System, must reduce H₂ pressure to < 2 psig.

Question 6

• LOT 202.18 Generator Seal Oil*
• • *

What cools the HSSO and ASSO Coolers?

Answer 6

CL-ACW

Maintains 100 ˚F - 120 ˚F

Note:
Maintained within 4 ˚F of ASSO.