Cooper Nuclear Station declares, exits “Notification of Unusual Event”

March 22, 2012

Cooper Nuclear Station, an electric power plant in southeast Nebraska, briefly declared a “Notification of Unusual Event” (NOUE) today at 10:34 a.m. due to a Freon leak on a refrigeration unit. The station exited the NOUE at 11:42 a.m. once the leak was stopped and it was confirmed that atmospheric conditions in the room were normal.

The refrigeration unit has been removed from service and is in the process of being repaired. An alternate unit is currently in use.

The declaration was made as part of the station’s safety and emergency preparedness procedures.

No one was injured, and there was no threat to the plant, employees or to the public. The plant continues to operate safely. Appropriate local, county, state, and federal agencies were also notified, as part of Cooper’s Emergency Preparedness plan.

A Notification of Unusual Event is the lowest and least serious of four emergency classifications established by the Nuclear Regulatory Commission for nuclear power plants. If placed on a scale of 1 to 4, with 1 being the least serious level of an emergency and 4 being the most serious level of an emergency, a “Notification of Unusual Event” would equal a 1.

Cooper Nuclear Station is located three miles southeast of Brownville, Nebraska, near the Missouri River. It is owned and operated by the Nebraska Public Power District, with headquarters in Columbus, Nebraska.

Always there when you need us, NPPD’s mission is to safely generate and deliver reliable, low cost, sustainable energy and provide outstanding customer service. Working in partnership with the state’s rural public power districts, cooperatives and municipalities, NPPD helps serve an estimated 1 million Nebraskans with retail or wholesale electric power and energy-related products and services.