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Nuclear Event – Potential Uncontrolled Radiation Release: Duane Arnold Energy Center, Iowa

2016/06/20

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 Sunday, 19 June, 2016 at 15:33 [CDT].

SECONDARY CONTAINMENT INOPERABLE

“At 1533 CDT on 06/19/2016, while performing Tech Spec Secondary Containment Airlock verification testing, both doors of a Secondary Containment Airlock were reported to be open simultaneously. The identified condition caused Secondary Containment to be considered inoperable. Upon discovery, immediate action was taken to close the doors restoring Secondary Containment. Airlock doors were under control of plant personnel throughout the event.

“This notification is being made pursuant to 10 CFR 50.72(b)(3)(v)(C).”

The licensee informed the NRC Resident Inspector.

Source: NRC  Event Number: 52022
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Previous event

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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