Reactor scrams, a stuttering siren and a loss-of-power incident

It must be Monday.

Events reported to the NRC today:

1. Late Thursday evening, the Unit 1 reactor at the Sequoyah nuclear power plant tripped on undervoltage to the Reactor Coolant Pump. The shutdown was said to be uncomplicated, and the reactor is in Hot Standby.

2. Friday morning, the Emergency Preparedness Manager at the Limerick nuclear station in Pennsylavia was informed by county officials that one of the station’s emergency sirens was sounding. Fifty minutes later, the siren was silenced.

3. Also Friday morning, the Unit 2 reactor at Susquehannah in Pennsylavia tripped unexpectedly during routine quarterly testing. Cause of the scram is under investigation.

4. And the Unit 3 reactor at Indian Point in New York had an autostart of two emergency diesel generators following a partial loss of offsite power during a thunderstorm. Output from the reactor was reduced from 100 per cent to 75 per cent.

You can read Event Reports at


About Robert Singleton

By day, I work for a call center. In my spare time, I try to save my hometown (and planet) from a nearly constant onslaught of greedheads, lunatics and land developers. I live in a fictional town called Austin, Texas, where I go to way too many meetings.
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