Alarms

Alarms

Unit Alarms

TIMELY Alarms

Timely alarms should be looked at (they are alarms of course), but as their name implies are not as urgent as the others.

• Reactor Lost: In isolation this generally isn't a big deal (probably a timeout, or something got turned off), but it could be bad, so it's up to operator discretion. If the reactor was at high damage, then Containment Breach will be tripped as well, which is a CRITICAL alarm.
• Reactor High Temp: Reactor temperature at or exceeded 1150K.
• 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

URGENT Alarms

Urgent alarms demand operator attention, but are not immediate threats unless ignored.

• Reactor Over Temp: Reactor is over-temperature (≥1200K) and is now starting to take damage, but will not meltdown until ≥100% damage. A timer will be shown on the status to estimate how much time until 100% damage is reached.
• Reactor High Waste: Reactor waste has exceeded 85% full. At 100%, excess waste will vent and release significant amounts of radiation.

EMERGENCY Alarms

Emergency alarms represent a safety threat and may warrant evacuation after a facility SCRAM due to threat of a meltdown and/or radiation leaks.

• Reactor Damage: The reactor containment is taking damage, and a meltdown will occur at some point at or after 100% damage.
• Reactor Waste Leak: The reactor waste tank is full and radiation is now leaking.

CRITICAL Alarms

Remaining in the facility (if near the reactors) is very much not recommended at this point. Evacuation is encouraged.

• Containment Breach: The reactor melted down (guessed by reactor not being formed, not being connected, and having previously been >90% damage).
• Containment Radiation: Radiation has been detected at the unit radiation monitor (if configured).
• Critical Damage: The reactor has met or exceeded critical levels of damage and may meltdown at any point.

Alarm Panel