Lighting

Question 1

LIST the three types of lighting systems

Answer 1

The lighting system consists of the normal lighting system, the essential lighting system and the emergency light system

Question 2

DESCRIBE the design basis for each lighting system

Answer 2

The normal lighting system is designed to provide sufficient illumination to permit normal plant operation and maintenance functions and comprises ~ 85% of lighting in the plant

The essential lighting system is designed to permit orderly plant shutdown following a loss of offsite power and comprises ~ 15% of lighting in the plant

The emergency lighting system is designed to permit operation in the Control Room and egress from other areas of the plant following a loss of the normal and essential lighting systems

Question 3

LIST the sources of power for the essential and emergency lighting panels upon a loss of power.

Answer 3

Normal lighting is fed from the plant nonessential buses.

Essential lighting is powered by the diesel generator fed buses to provide continued on site lighting following a LOP.

8-hour battery-powered emergency lighting is provided for the areas which are needed for operation of safe shutdown equipment and for access and egress routes thereto

Question 4

STATE the location of the emergency lighting panel and inverter for Control room emergency fluorescent lights

Answer 4

Located in Mech Room where CBA air conditioning units are