Tag Archives: Exelon

Update: Limerick shutdown resulted in Technical Support System ventilation problems

Yesterday, operators at the Limerick nuclear power plant scrammed the Unit 1 reactor after an electrical problem knocked out the main generator recirculating water pumps. Today, plant owner Exelon filed an Event Report with the Nuclear Regulatory Commission that revealed … Continue reading

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Pennsylvania nuclear reactor shut down after losing power to main generator cooling pumps‏

Exelon announced that Unit 1 at the Limerick nuclear power plant was shut down earlier today after losing power to the main generator cooling pumps. There are not a lot of additional details available at this hour, and most of … Continue reading

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Former Exelon CEO says new nukes don’t make economic sense

Jeff McMahon just blogged this on Forbes: Nuclear power is no longer an economically viable source of new energy in the United States, the freshly-retired CEO of Exelon, America’s largest producer of nuclear power, said in Chicago Thursday. And it … Continue reading

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Event Reports: Illinois reactor suffers another loss of offsite power incident

Yesterday afternoon, operators at the Byron nuclear power plant in Illinois declared an Unusual Event due to a malfunction in the switchyard that caused the Unit 2 reactor to lose offsite power. Emergency diesel generators started following the incident, and … Continue reading

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Event Report: Operators scram Illinois nuke following turbine trip

The Unit 2 reactor at the Byron nuclear power plant in Illinois has been shut down since January 31, following a loss of offsite power incident. On Monday of this week, repairs had been completed, and operators were attempting to … Continue reading

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Event Report: Minnesota nuke leaked condensate containing tritium following pump failure

Yesterday afternoon, a condensate return pump failed at the Prairie Island nuclear power plant in Minnesota, releasing 27 gallons water. Prairie Island released an unusually detailed report of what the water contained: “The release contained the following chemicals: 1) 11.2 … Continue reading

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Update: Offsite power restored at Illinois nuke, and NRC begins investigation

The Byron nuclear power plant notified the Nuclear Regulatory Commission that it had restored offsite power to its Unit 2 reactor as of 10 pm yesterday. This means that the reactor was running on power supplied by emergency diesel generators … Continue reading

Posted in Byron, Electrical problems, Event Reports, Exelon, Loss of offsite power, Nuclear Regulatory Commission, Plant shutdowns, Radiation leak, Reactor problems | Tagged , , , , , | Leave a comment