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Flashcards in Seismic Monitioring Deck (9)
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1
Q

The safe shutdown earthquake (SSE) and the operating basis earthquake (OBE) magnitude readings are

A

0.20g and 0.10g, respectively

2
Q

The seismic monitoring system is located…

A

…only in Unit 1.

3
Q

The purpose of the seismic monitoring system is…

A

… to detect and record seismic activity and determine its magnitude.

4
Q

If any accelerometer exceeds its setpoint…

A

… it will cause all recorders to start.

5
Q

The Seismic Monitoring Panel receives power from…

A

distribution panel NNN-D11.

6
Q

When seismic motion is reported or the SEISMIC OCCURRENCE alarm is annunciated in the control room, the STA is required to perform…

A

… a Level 1 evaluation within 1 hour.

7
Q

E-plan classifications must be made…

A

… within 15 minutes of when indications are available which show that an EAL has been met or exceeded.

8
Q

Summarize actions to take if the ground motion is greater that OBE.

A

Primary action is to notify each Unit of need to shutdown to mode 3 for any Unit that is in mode 1 or 2, and ensure that alarm response procedures are carried out for system isolation and inspection.

  • Perform emergency plan classification
  • If an OBE has been exceeded, all three units must be shutdown to mode 3.
  • Suspend fuel handling operations.
  • Various plant inspections and walkdowns.
9
Q

When ground motion is between ____ and OBE then…

A

For cases where an event has exceeded 0.01g but not the OBE, the Analysis of Seismic Event procedure requires communication to the Unit 1, 2 ,3 SM, component/system inspections, verification that AFN-P01 and associated