Category Archives: Electrical problems

NRC Bulletin warns plants of potential design flaw that could affect electrical systems following loss of offsite power

Posted on July 27, 2012 by

The Nuclear Regulatory Commission issued a Bulletin today requesting information from all 104 operating commercial nuclear reactors in the United States. According to an NRC press release: The Nuclear Regulatory Commission has issued a Bulletin to all nuclear power plant … Continue reading →

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

Posted on February 1, 2012 by

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

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

Posted on January 31, 2012 by

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 →

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

Update: Emergency outage at South Texas nuke enters second week‏

Posted on December 9, 2011 by

On November 29, the Unit 2 reactor at the South Texas Project experienced an automatic reactor trip from 100 per cent power. The reactor had just returned to full power after a refueling outage. In the shutdown, a steam dump valve … Continue reading →

Posted in Electrical problems, Event Reports, Expansion, Hydrogen leak, Loan guarantees, Nuclear Regulatory Commission, Plant shutdowns, Reactor problems, South Texas Project | Tagged , , , , , | Leave a comment

TEPCO probe finds ‘no significant errors’ in meltdown response

Posted on December 3, 2011 by

In the investigation of the Watergate breakin and coverup, Richard Nixon set a new standard for the minimum amount of acceptance of responsibility, when he acknowledged “Mistakes were made.” Tokyo Electric Power Co. (TEPCO) is not that forthcoming. As the … Continue reading →

Posted in Coolant leak, Earthquake, Electrical problems, Explosion, Fire, Flooding, Fukushima, GE Mark I reactor, Hydrogen leak, Loss of offsite power, Meltdown, Plant shutdowns, Radiation leak, Reactor problems, TEPCO, Tsunami | Tagged , , , , | Leave a comment

Event Reports: Bearing failure in Michigan, loss of offsite power in Wisconsin

Posted on November 28, 2011 by

A couple of items from today’s Nuclear Regulatory Commission Event Reports today: 1. Friday afternoon, operators at the Cook nuclear power plant in Michigan manually started the Unit 1 Auxiliary Feedwater Pumps after one of the pumps suffered a bearing failure. … Continue reading →

Posted in Cook, Electrical problems, Event Reports, Loss of offsite power, Nuclear Regulatory Commission, Point Beach, Reactor problems | Tagged , , , , , , , , | Leave a comment