Section 3.8 Electrical Power Systems

Question 1

• LOT 201.37 Class 1E 125VDC*
• • *

What is the minimum Individual Cell Voltage (ICV) allowed on the Class 1E batteries?

Answer 1

2.07 VDC
LCO 3.8.2.3 Battery Parameters

Battery overall voltage must be ≥128.03 VDC to make battery OPERABLE. (59 cells x 2.17 avg volts/cell)

Question 2

• LOT 201.30 Offsite Electrical*
• • *

How many gallons of fuel oil is required in each Standby Diesel’s fuel tank to make that diesel OPERABLE?

Answer 2

> 60,500 gallons

Question 3

• LOT 201.30 Offsite Electrical*
• • *

Which switchyard lines are not allowed to be counted toward tech specs?

Answer 3

• *Blessing 44 Line**
• Limited capability to provide required voltage*
• *138 KV Blessing Line**
• Lines run below other lines*
• *HILLJE 64 Line**
• Lines run below other lines*
• *HILLJE 44 Line**
• Lines run below other lines*

Question 4

• LCO 3.8.1.1 AC Sources - Operating*
• • *

When is LCO 3.8.1.1 AC Sources - Operating Applicable?

Answer 4

MODES 1-4

Requires 2 offsite sources and 3 ESF DGs

Question 5

• LCO 3.8.1.1 AC Sources - Operating*
• • *

What electrical busses if lost constitutes a loss of an offsite power source?

Answer 5

• Loss of Both Offsite Sources:*
• *Loss of 2 standby Busses to ESF Busses**

Loss of North and South Bus

Switchyard voltage < 340 kV (Normal) or < 358 kV (Alternate)

Power lost to both switchyard battery chargers for 20 hrs

• Loss of One Offsite Source:*
• *Loss of 1 standby bus to ESF switchgear**

Loss of North or South Bus

All ESF Busses powered from same transformer

Question 6

• LCO 3.8.1.1 AC Sources - Operating*
• • *

What must be verified if 1 ESF DG is INOPERABLE in MODES 1-4?

Answer 6

Verify all dependent systems the rely on the remaining OPERABLE ESF DG are OPERABLE.

Ensure AFW 14 OPERABLE while in MODES 1-3