Category Archives: Hydrogen leak

Event Report: Michigan reactor shut down

Yesterday morning, operators at the Fermi nuclear power plant manually shut down the Unit 2 reactor after discovering “hydrogen gas in-leakage into the stator water cooling system from the main turbine generator.” Fermi officials desribed the incident as “uncomplicated” while noting … Continue reading

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Event Reports: Diablo Canyon declares Unusual Event following 5.3 earthquake, San Onofre reports a hydrogen leak, fire at Nine Mile Point

Both of California’s nuclear power stations reported incidents to the Nuclear Regulatory Commission last Monday: 1. Diablo Canyon declared an Unusual Event following a 5.3 magnitude earthquake Sunday in the Salinas Valley in central California. The earthquake met two of … Continue reading

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Event Reports: Fires in South Carolina and Florida, a lightning strike in Mississippi and a reactor shutdown in Illinois

It was a busy Tuesday on the Nuclear Regulatory Commission’s Event Reports page: 1. Yesterday morning, a fire broke was reported in the Plant Vital Battery Room for Unit 2 at the Catawba nuclear power plant in South Carolina. The fire broke … Continue reading

Posted in Catawba, Event Reports, Fire, GE Mark I reactor, Grand Gulf, Hydrogen leak, Nuclear Regulatory Commission, Quad Cities, Turkey Point | Tagged , , , , , , | 2 Comments

Event Reports: Human errors, tritium releases and a hydrogen leak

Some items from today’s NRC Event Reports:   1. Sometimes safety systems can be overcome by human error. Early yesterday morning, a technician left two doors open in the Unit 2 reactor building at the Dresden nuclear power plant in … Continue reading

Posted in Clinton, Dresden, Event Reports, GE Mark I reactor, Hydrogen leak, Monticello, Nuclear Regulatory Commission, Radiation leak, Reactor problems, River Bend, tritium, Vermont Yankee | Tagged , , | 1 Comment

Update: Emergency outage at South Texas nuke enters second week‏

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

New radioactive water leak from Fukushima discovered‏

The New York Times reported today: At least 45 tons of highly radioactive water has leaked from a purification facility at the Fukushima Daiichi buclear power stationnt, and some of it may have reached the Pacific Ocean, the plant’s operator … Continue reading

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

TEPCO probe finds ‘no significant errors’ in meltdown response

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