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At 0402 CDT on 6/19/2011 a Notification of Unusual Event was declared due to the elevation of the Missouri River reaching 899.1 feet above mean sea level. This is above the Emergency Action Level HU1.5 elevation of 899 feet. The Missouri River is expected to crest at 899.5 feet within the next couple of days. It is expected that the elevation of the Missouri River will remain above 899 feet for most of the summer. Actions are in progress in accordance with the site flooding procedure, including strategic placement of sand bags at building entrances and important facilities. There is no major plant equipment out of service at this time. Personnel access to the site is not presently impeded. Emergency evacuation routes remain available. The licensee notified the NRC Resident Inspector. The licensee notified the State of Nebraska Emergency Management Agency, the State of Missouri State Emergency Management Agency, the Nemaha County Emergency Operations Center, the Richardson County Emergency Operations Center and the Atchison County Emergency Operations Center.

• * * UPDATED FROM BRIAN STANDER TO DONALD NORWOOD AT 0743 EDT ON 6/19/2011 * * *

On 6/19/2011 at 0447 CDT, Nebraska Public Power District issued a press release concerning the declaration of a Notification of Unusual Event declared today at 0402 for the Missouri River elevation above 899 feet above sea level. This is a four hour report per 10CFR50.72(b)(2)(xi) for any event or situation for which a news release is planned or notification to other government agencies has been or will be made which is related to heightened public or government concern. State and local agencies were notified of the expected news release during the NOUE notification. At 0402 CDT, Missouri River elevation was at 899.1 feet. No updated river projections are available at this time. Level is expected to remain at least below plant grade elevation. No deficiencies with the nearby protective levees have been identified surrounding the plant. Actions are in progress in accordance with the site flooding procedure, including strategic placement of sandbags at building entrances and important facilities. Personnel access to the site is not presently impeded, and required emergency evacuation routes remain available. The licensee notified the NRC Resident Inspector. Notified R4DO (Werner).

• * * UPDATE AT 1121 EDT ON 7/12/2011 FROM MAURICE PALMER TO MARK ABRAMOVITZ * * *

Cooper Nuclear Station exited the Notification of Unusual Event (NOUE) at 0947 CDT on 7/12/11. River level is currently at 895.8 feet MSL which is below the NOUE threshold of 899 feet MSL. River level is forecast to continue going down. The licensee is expecting to issue a press release today. The licensee notified the NRC Resident Inspector, State of Missouri, Nebraska Emergency Management Agency, Nemaha County Sheriff, Richardson County Sheriff, Missouri FEMA, and the Atchison County 911 center. Notified the R4DO (Cain), IRD (Morris), NRR (Thorpe), DHS (Strangfeld), and FEMA (Hollis).

• * * UPDATE AT 1426 EDT ON 7/12/11 FROM JEREMY SIMS TO VINCE KLCO* * *

A press release has been issued to inform the public of Cooper Nuclear Station's exit from the Notification of Unusual Event, regarding high Missouri River level. The initial entry into the Notification of Unusual Event occurred on 06/19/2011 and was exited on 07/12/2011. The highest river level observed at (Cooper) was 900'-8". Plant grade is at 903'-6". The press release reports the current Missouri river level as 895.8' and forecasted to continue to lower. Notified the R4DO(Cain).