Electrical

Question 1

3.8.1 AC - Sources Operating

Answer 1

The Following AC Electrical sources shall be Operable:
A. Two qualified circuits between the offsite transmission network and the on-site Class 1E AC Electrical Power Distribution System;

AND

B. Four Diesel Generators capable of supplying the on-site Class 1E AC electrical Power Distribution System

Applicability: Modes 1,2,3,4

Notes:
1. LCO 3.0.4.b is NOT applicable to DGs
2. Enter applicable conditions and required actions of LCO 3.8.9, “Distribution Systems-Operating” when any condition is entered with no AC power source or any shutdown board resulting in a de-energized shutdown board

Question 2

CSST C Supplies Which Train Shutdown Boards

Answer 2

1A-A and 2A-A 6.9 Shutdown Boards

Question 3

CSST D Supplies Which Train Shutdown Board

Answer 3

1B-B and 2B-B 6.9 Shutdown Board

Question 4

Which Transformers are grouped together?

Answer 4

CSST A and D

CSST B and C

Question 5

480v Shutdown Board Normal Voltage Limits

Answer 5

450 - 515 volts

Question 6

6.9kv Shutdown Board Normal Voltages

Answer 6

6560 - 7260 volts

Question 7

Load Shed Circuit Operation

Answer 7

CSST A or B OOS
BOTH Hand Switches in Active
Dual Unit trip
Trips #3 and #4 RCPs on both units
(Prevents no more than 4 RCPs on a single CSST)