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Nuclear Event – Potential Uncontrolled Radiation Release (06/29/2016): Duane Arnold Energy Center, Iowa

2016/06/30

North America – USA | State of Iowa, Duane Arnold Energy Center [Unit 1]
Location: 42°06’02.0″N 91°46’38.0″W
Present Operational Age: ~43 years
Event: POT UNCNTRL RAD REL/SECONDARY CONTAINMENT

Nuclear Event in USA on Wednesday, 29 June, 2016 at 09:40 [CDT].

SECONDARY CONTAINMENT INOPERABLE

“At 0940 CDT on 6/29/2016, both doors of a Secondary Containment Airlock were reported to be open simultaneously for a period of less than 5 seconds. The brief time that the doors were simultaneously open constituted an inoperable condition of Secondary Containment. Secondary Containment was immediately restored to operable by closing the airlock doors. The airlock interlock was repaired and verified to operate correctly.

“This event is being reported pursuant of 10 CFR 50.72(b)(3)(v)(C).

“The Senior Resident Inspector has been notified.”

Source: NRC  Event Number: 52053
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Previous events

Nuclear Event in USA on Sunday, 19 June, 2016 at 15:33 [CDT]. SECONDARY CONTAINMENT INOPERABLE

Nuclear Event in USA on Tuesday, 12 April, 2016 at 12:35 [CDT]. COURTESY OFFSITE NOTIFICATION MADE TO STATE AND COUNTY OFFICIALS

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