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Mikayla edited this page Feb 26, 2023 · 15 revisions

Alarms

Unit Alarms

Timely Alarms

Timely alarms should be looked at, but as their name implies are not as urgent as the others.

  • RPS Transient: An RPS trip has occurred that was not due to manual operator SCRAM or a timeout
  • RCS Transient: RCS transient conditions have been met (see below)

RCS Transient Conditions

An RCS transient is caused by any of the following per the Annunciator

  • Reactor coolant level low
  • Boiler water level low
  • Turbine over speed
  • Reactor coolant related RPS trip (coolant low, excess heated coolant)
  • RCS flow low
  • Max water return feed
  • If "flow stability delay" has elapsed (15 seconds since last burn rate change), then
    • Boil rate mismatch
    • Coolant feed mismatch
    • Steam feed mismatch

Alarm Panel

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