3.8.4 DC Sources - Operating

Question 1

3.8.4 DC Sources Operating:

The train A and Train B DC electrical power subsystems shall be OPERABLE

Applicability: ??

Answer 1

Modes 1, 2, 3, and 4

Question 2

3.8.4

A. One battery charger on one subsystem inoperable

Answer 2

A.1 Restore battery terminal voltage to greater than or equal to the minimum established float voltage (2 hours)

AND

A.2 Verify current battery float voltage <2 amps (once per 12 hours)

AND

A.3 Restore battery charger to OPERABLE status (72 hours)

Question 3

3.8.4

B. One DC electrical power subsystem inoperable for reasons other than condition A

Answer 3

B.1 Restore DC electrical power subsystem to OPERABLE status
(2 hours)

Question 4

3.8.4

C. Required action and associated completion time not met

Answer 4

C.1 Be in mode 3 (6 hours)

AND

C.2 be in mode 5 (36 hours)

Question 5

3.8.4

Each DC electrical power subsystem consists of _________.

Answer 5

Two 125VDC batteries, the associated battery charger(s) for each battery, and all associated control equipment and interconnecting cabling.

Question 6

3.8.4

The battery cells nominal specific gravity is ____.

Answer 6

1.215 +/- 0.010