3.8 "Electrical Power Systems"

Question 1

LCO 3.8.1 title

Answer 1

AC Sources - Operating

Question 2

LCO 3.8.1 requirement

Answer 2

The following AC electrical sources shall be operable:

• 2 qualified circuits between the offsite transmission network and the onsite Class 1E AC Electrical Power Distribution System
• 2 EDGs, each capable of supplying 1 train of the onsite Class 1E AC Electrical Power Distribution System

Question 3

LCO 3.8.1 applicability

Answer 3

Modes 1-4

Question 4

LCO 3.8.1 required actions < 1 hour

Answer 4

• 1 offsite circuit inoperable, then perform offsite source checks for the operable offsite circuit w/in 1 hour
• 1 EDG inoperable, then perform offsite source checks w/in 1 hour
• 3 or more AC sources inoperable, then enter LCO 3.0.3 immediately

Question 5

LCO 3.8.2 title

Answer 5

AC Sources - Shutdown

Question 6

LCO 3.8.2 requirement

Answer 6

The following AC electrical sources shall be operable:

• 1 qualified circuits between the offsite transmission network and the onsite Class 1E AC Electrical Power Distribution System
• 1 EDGs, each capable of supplying 1 train of the onsite Class 1E AC Electrical Power Distribution System

Question 7

LCO 3.8.2 applicability

Answer 7

• Modes 5 and 6

- During movement of irradiated fuel assemblies

Question 8

LCO 3.8.2 required actions < 1 hour

Answer 8

• The required offsite circuit inoperable, then declare affected required feature(s) with no offsite power available inoperable OR suspend core alterations and movement of irradiated fuel assemblies, initiate action to suspend operations involving positive reactivity additions, AND initiate action to restore required offsite power circuit to operable immediately
• The required EDG inoperable, then suspend core alterations and movement of irradiated fuel assemblies, initiate action to suspend operations involving positive reactivity additions, AND initiate action to restore required EDG to operable

Question 9

LCO 3.8.3 title

Answer 9

Diesel Fuel, Lube Oil, and Starting Air

Question 10

LCO 3.8.3 requirement

Answer 10

• For each EDG, the stored fuel oil, lube oil, and starting air subsystem shall be w/in limits, and both diesel fuel oil transfer systems shall be operable
• Separate Condition entry is allowed for each EDG

Question 11

LCO 3.8.3 applicability

Answer 11

When associated EDG is required to be operable

Question 12

LCO 3.8.3 required actions < 1 hour

Answer 12

Required action and associated completion time not met OR stored fuel oil, lube oil, or starting air subsystem not w/in limits for reasons other than fuel oil or lube oil inventory < 7 day supply and > 6 day supply, or fuel oil properties not w/in limit, then declare associated EDG(s) inoperable immediately

Question 13

LCO 3.8.4 title

Answer 13

DC Sources - Operating

Question 14

LCO 3.8.4 requirement

Answer 14

The Left Train and Right Train DC electrical power sources shall be operable

Question 15

LCO 3.8.4 applicability

Answer 15

Modes 1-4

Question 16

LCO 3.8.4 required actions < 1 hour

Answer 16

NONE

Question 17

LCO 3.8.5 title

Answer 17

DC Sources - Shutdown

Question 18

LCO 3.8.5 requirement

Answer 18

DC electrical power source(s) shall be operable to support the DC electrical power distribution subsystem(s) required by LCO 3.8.10 “Distribution Systems - Shutdown”

Question 19

LCO 3.8.5 applicability

Answer 19

• Modes 5 and 6

- During movement of irradiated fuel assemblies

Question 20

LCO 3.8.5 required actions < 1 hour

Answer 20

1 or more required DC electrical power sources inoperable, then declare affected required feature(s) inoperable OR suspend core alterations, suspend movement of irradiated fuel assemblies, initiate action to suspend operations involving positive reactivity additions, AND initiate action to restore required DC electrical power source(s) to operable status

Question 21

LCO 3.8.6 title

Answer 21

Battery Cell Parameters

Question 22

LCO 3.8.6 requirement

Answer 22

• Battery cell parameters for the Left Train and Right Train batteries shall be w/in limits
• Separate Condition entry is allowed for each battery

Question 23

LCO 3.8.6 applicability

Answer 23

When associated DC electrical power source(s) are required to be operable

Question 24

LCO 3.8.6 required actions < 1 hour

Answer 24

• 1 or more batteries with 1 or more cell parameters not w/in Category A or B limits, then verify pilot cells electrolyte level and float voltage meet Table 3.8.6-1 Category C limits w/in 1 hour
• Required action and completion time not met from condition above, 1 or more batteries w/average electrolyte temperature of the representative cells < 70 F, OR 1 or more batteries with 1 or more battery cell parameters not w/in Category C limits, then declare associated battery inoperable immediately

Question 25

LCO 3.8.7 title

Answer 25

Inverters - Operating

Question 26

LCO 3.8.7 requirement

Answer 26

4 inverters shall be operable

Question 27

LCO 3.8.7 applicability

Answer 27

Modes 1-4

Question 28

LCO 3.8.7 required actions < 1 hour

Answer 28

NONE

Question 29

LCO 3.8.8 title

Answer 29

Inverters - Shutdown

Question 30

LCO 3.8.8 requirement

Answer 30

Inverter(s) shall be operable to support the onsite Class 1E Preferred AC bus electrical power distribution subsystem(s) required by LCO 3.8.10 "Distribution Systems - Shutdown"

Question 31

LCO 3.8.8 applicability

Answer 31

- Modes 5 and 6 | - During movement of irradiated fuel assemblies

Question 32

LCO 3.8.8 required actions < 1 hour

Answer 32

1 or more required inverters inoperable, then declare affected required feature(s) inoperable OR suspend core alterations, suspend movement of irradiated fuel assemblies, initiate action to suspend operations involving positive reactivity additions, AND initiate action to restore required inverters to operable immediately

Question 33

LCO 3.8.9 title

Answer 33

Distribution Systems - Operating

Question 34

LCO 3.8.9 requirement

Answer 34

Left Train and Right Train AC, DC, and Preferred AC bus electrical power distribution subsystems shall be operable

Question 35

LCO 3.8.9 applicability

Answer 35

Modes 1-4

Question 36

LCO 3.8.9 required actions < 1 hour

Answer 36

2 or more inoperable distribution subsystems that result in a loss of function, then enter LCO 3.0.3 immediately

Question 37

LCO 3.8.10 title

Answer 37

Distribution Systems - Shutdown

Question 38

LCO 3.8.10 requirement

Answer 38

The necessary portion of AC, DC, and Preferred AC bus electrical power distribution subsystems shall be operable to support equipment required to be operable

Question 39

LCO 3.8.10 applicability

Answer 39

- Modes 5 and 6 | - During movement of irradiated fuel assemblies

Question 40

LCO 3.8.10 required actions < 1 hour

Answer 40

1 or more required AC, DC, or Preferred AC bus electrical power distribution subsystems inoperable, then declare associated supported required feature(s) inoperable OR suspend core alterations, suspend movement of irradiated fuel assemblies, initiate action to suspend operations involving positive reactivity additions, initiate actions to restore required AC, DC, and Preferred AC bus electrical power distribution subsystems to operable, AND declare associated required shutdown cooling train inoperable and not in operation immediately