Nuclear Outages

Prairie Island Nuclear Generating Plant’s Unit 2 reactor returned to full power at 4:09 a.m. CDT today after workers completed a scheduled maintenance and refueling outage. During the outage, which started Feb. 22, approximately 400 contractors joined with the plant’s 800 employees to...

Areva announced it has completed outage work at the DC Cook plant with extremely low-dose (radiation) exposure during the planned spring outage, according to a Tuesday release. The AREVA team handling steam generator maintenance work on DC Cook Unit 2 as part of the recent outage successfully completed...

The Pilgrim nuclear power plant returned to service Saturday after an emergency shutdown on May 23. The plant was manually shut down when workers detected reduced air pressure in the facility’s condenser , according to spokesmen for the NRC and Entergy, the plant’s owner. It marked the...

At Brown's Ferry on Tuesday, the Unit 3 reactor was automatically scrammed due to de-energization of Reactor Protection System (RPS) from actuation of 3A Unit Station Service Transformer (USST) differential relay 387SA, resulting in a loss of 500KV power to Unit 3, according to an NRC report. ...

Officials say Entergy's Pilgrim Nuclear Power Station in Plymouth has been shut down after a condenser at the station lost vacuum pressure during a cleaning, officials said. Officials said the incident happened at about 1:10 p.m. on Tuesday with the plant was operating at about 30 percent capacity...

River Bend Station experienced a reactor scram Monday resulting from an RPS actuation, according to an NRC release. Following the scram, reactor water level briefly lowered below level 3. The reactor is stable with pressure and temperature being controlled by the feed water system and main steam bypass...

Exelon has removed Limerick Nuclear Plant's Unit 2 reactor from service for a scheduled maintenance outage so workers can replace two steam relief valves. Plant personnel will complete the maintenance and fully test the new components before returning the unit to service. The repairs can only be...

EDF's 900-MW Gravelines 6 nuclear reactor in northern France experienced an unplanned outage on Monday at 9:35 GMT, France's power grid RTE said on its website. An EDF spokesman said the outage had been caused by a default on a sensor that measures the good working order of the reactor. ...

After shutting Sizewell B down due to a potential issue with its lubrication system on Sunday, EDF resumed operation of the nuclear plant's two turbines Tuesday. The short maintenance outage was a precautionary measure, according to Sizewell B director Jim Crawford. “Safety is our over...

The Palisades nuclear plant in southwestern Michigan returned to service Saturday after going offline on April 8th for scheduled refueling and maintenance . The 41-year-old plant has been under NRC scrutiny because of a series of safety problems in recent months. Officials from Entergy, which owns...

EDF Energy shut down down its Sizewell and Torness 2 reactors Sunday, according to a statement by the company. The statement said that the reactor at Sizewell was taken offline for scheduled maintenance, but it did not indicate whether Torness 2 was a planned or unplanned outage. The two reactors...

FirstEnergy Nuclear Operating Company, a subsidiary of FirstEnergy, announced it has returned Beaver Valley Power Station Unit 1 to service. The reactor was shut down in early April for refueling and maintenance. Beaver Valley's 911-megawatt Unit 1 began producing electricity at 10:00 a.m. today...

The PSEG-owned Salem 1 nuclear plant is back in service as of Monday afternoon. Last week, the reactor automatically tripped offline last while crews were testing the emergency reactor shutdown system. The Unusual Event, which was declared due to multiple fire alarms involving the containment building...

FirstEnergy Nuclear Operating Company (FENOC), a subsidiary of FirstEnergy Corp., announced it has shut down its Davis-Besse Nuclear Power Station in Oak Harbor, Ohio, for scheduled refueling and maintenance. While the 908-megawatt unit is offline, 68 of the 177 fuel assemblies will be replaced and...

Spain's 1,000-MW Almaraz ll nuclear power station was disconnected Sunday afternoon for scheduled refueling, operators said Monday. The outage is expected to last about 40 days. Spain's seven other nuclear plants were working normally.

DTE Energy has restarted its Fermi 2 Nuclear Power Plant following a refueling and maintenance outage that began March 26. "The Fermi 2 team completed an enormous amount of work during the outage, while always keeping safety as the top priority," said Jack Davis, senior vice president and...

PG&E has restarted Unit 2 reactor at Diablo Canyon six days after the plant was shut down due to an invasion of sea salp that clogged seawater intake screens. Winds began blowing the creatures into the plant's cooling water intake cove early last week. Salps are small barrel-shaped plankton...

The Donald C. Cook Unit 2 reactor automatically tripped late Monday evening after a main turbine trip, according to an NRC report. The cause of the trip is still under investigation. According to the report, the electrical grid is stable and Unit 2 is being supplied by offsite power, and a preliminary...

An Unusual Event was declared at PSE&G-owned Salem nuclear plant in New Jersey after the Unit 1 reactor tripped and experienced a safety injection (SI) signal due to a high steam flow coincident with a low steam pressure signal, according to a Monday report. According to the NRC, "At the...

Indiana Michigan Power has reported that the Unit 2 at Donald C. Cook Nuclear Plant Cook has returned to service. The restart, which occurred Saturday, followed a 38-day, 16-hour refueling outage of the power plant that began on March 21. In addition to normal refueling and maintenance procedures...

At Farley Nuclear Plant near Dothan, Ala., Southern Co. has returned the Unit 1 reactor to service following a 25-day long period of refueling and maintenance. The outage was completed safely and efficiently, according to a Friday release by the company. "We achieved our number one priority...

PG&E has shut down the Unit 2 reactor at Diablo Canyon Power Plant due to an infestation of small jellyfish-like creatures called sea salp. The company stated in a release that it will not restart the unit until conditions improve at the intake structure - which is currently clogged with the creatures...

E.ON reconnected its nuclear reactor at Grohnde to the grid on April 22, the Lower Saxony environment ministry said in a release Monday. The 1,430 MW reactor, located in northern Germany, was reconnected after completing maintenance work which began on April 5.

PG&E has shut down its Unit 1 reactor Diablo Canyon for repairs, the company announced Monday. PG&E employees and 1,000 temporary workers will now start work to replace a portion of the reactor fuel, test systems and components that aren't normally accessible, as well as installing a new...

Bulgaria has shut down Unit 5 of Kozloduy nuclear power plant for annual repairs and maintenance. During the shutdown, the 1,000 MW reactor will be refueled and undergo repairs. It is scheduled to resume operation at the end of May. The plant's Unit 6 reactor is operating at full capacity....