Seismic Monitoring

Question 1

What Earthquake could reasonably be expected to affect NMP?

Answer 1

Operating Basis Earthquake

Question 2

What is OBE vibratory ground motion?

Answer 2

0.075g

Question 3

What Earthquake is the maximum in which the plant can still safely shutdown?

Answer 3

Safe Shutdown Earthquake (SSE)

Question 4

What is Safe Shutdown Earthquake (SSE) vibratory ground motion?

Answer 4

0.15g

Question 5

What is the setpoint of the seismic switch?

Answer 5

0.075g

Question 6

What is the setpoint of the seismic trigger?

Answer 6

0.01g

Question 7

What happens on a Seismic Trigger?

Answer 7

Alarm, indication Black to White, Tapes Start.

Question 8

Where is teh event indication light?

Answer 8

PWRS 1

Question 9

What do the amber lights indicate?

Answer 9

OBE level, 0.075g

Question 10

What do the red lights indicate?

Answer 10

SSE level, 0.15g

Question 11

What is the purpose of seismic monitoring?

Answer 11

Monitors and records the input motion and the plant response in the event of an earthquake.