Tag Archives: event reports

Event Report: Illinois nuke loses emergency communications systems

The Clinton nuclear power plant lost all offsite communications abilities yesterday afternoon when utility workers offsite accidentally cut an underground cable, severing the phone lines to the plant. Lost systems included the plant’s Health Physics Network, Emergency Notification System and … Continue reading

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Preliminary Notification: South Texas nuke shutdown included hyrdrogen leak

Usually, the information I send out is from Nuclear Regulatory Commission Event Reports, which are published on the NRC website the first working day following an incident. However, the NRC also has a category of reports called Preliminary Notifications, which … Continue reading

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Event Report: Problems at South Texas Project began more than a week ago

The South Texas Project reported yesterday to the Nuclear Regulatory Commission that its Unit 2 reactor shut down Tuesday morning. Problems with the reactor actually went back more than a week, as an NRC Event Report from today spells out.   On … Continue reading

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Event Report: Illinois nuke shuts down after steam valves fail

Yesterday afternoon, operators at the Clinton nuclear power plant in Illinois were ramping down the station’s sole reactor in preparation for refueling. At 16 per cent power, the reactor scrammed on high steam dome pressure after the main steam valves unexpectedly closed. … Continue reading

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Event Report: South Texas nuke shuts down

Reactor 2 at the South Texas Nuclear Project shut down early yesterday morning due to a turbine trip and generator lockout. The unit’s Auxiliary Feedwater system activated following the turbine trip. A steam dump valve failed in the open position … Continue reading

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

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

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Event Reports: Two reactor shutdowns and a case of worker exposure

1. The Unit 1 reactor at the Palo Verde nuclear power plant in Arizona had to be manually shut down on Tuesday night. Operators were conducting Low Power Physics Testing in preparation for restarting the reactor following a refueling outage when … Continue reading

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