Tag Archives: Exelon

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

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Event Report: Update on loss of power incident at Illinois nuke

Today’s NRC Event Reports include the incident yesterday morning at the Byron Unit 2 reactor in Illinois. There are three significant updates.   First, the reactor is still operating on power supplied by the unit’s emergency diesel generators. So, at … Continue reading

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Illinois nuke shuts down after loss of power incident

 The Chicago Tribune reported this afternoon: U.S. power company Exelon’s 1,136-megawatt Unit 2 at the Byron nuclear power plant in Illinois shut Monday morning, a spokeswoman at the U.S. Nuclear Regulatory Commission (NRC) said. Exelon declared an unusual event due … Continue reading

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Irene knocks out nation’s oldest nuke

Bloomberg Businessweek reported this in the last hour: Hurricane Irene knocked out electricity to more than 900,000 customers from South Carolina to Maryland as the storm carved its way north along the U.S. East Coast, prompting Exelon Corp.’s Oyster Creek … Continue reading

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