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Nuclear Event – Unusual Event/High High Radiation Condition: Browns Ferry Nuclear Plant, Unit 3, Alabama

2016/04/07

North America – USA | State of Alabama, Athens, Browns Ferry Nuclear Plant
Location: 34°42’14.0″N 87°07’07.0″W
Present Operational Age: ~43 years
Event: UNUSUAL EVENT – EMERGENCY DECLARED

Browns Ferry Nuclear Plant

Browns Ferry Nuclear Plant: Tennessee River near Decatur and Athens, Alabama. – Owned by TVA. In 1974, the time of its initial operation, it was the largest nuclear plant in the world.. Image source: wikimedia.org

Nuclear Event in USA on Wednesday, 06 April, 2016 at 15:45 [CDT]

UNUSUAL EVENT DECLARED DUE TO MAIN STEAMLINE HIGH HIGH RADIATION CONDITION

At 1545 CDT on 04/06/16 Browns Ferry Unit 3 declared and exited the declaration of an unusual event due to a main steam line high high radiation condition. Power to Unit 3 was reduced to 91 percent power. The high radiation condition alarm cleared at 1526 CDT. Browns Ferry Unit 3 reported that the high radiation conditions were due to resin intrusion from the condensate demineralizers into the reactor and hydrogen water chemistry was a potential contributor to the event. The cause is still under investigation.

The NRC Resident Inspector has been notified.

State and Local notifications were made.

Notified DHS SWO, FEMA Ops Center, NICC Watch Officer, FEMA NWC and Nuclear SSA (email).

* * * UPDATE FROM BILL BALL TO DANIEL MILLS AT 0034 EDT ON 04/07/2016 * * *

“At 1941 [CDT] BFN [Brown’s Ferry] determined this notification to be potentially newsworthy due to receiving notification that counties [surrounding the plant] were alerted of this event. No plant conditions changed.”

The licensee may issue a press release.

The licensee will notify the NRC Resident Inspector.

Notified R2DO (Nease).

Source: NRC  Event Number: 51850


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