ENS 50989

v t e ENS Event
18:20 Apr 16, 2015
Title	Both Secondary Containment Airlock Doors Open Simultaneously
Event Description	At 1320 CDT, on April 16, 2015, both doors of a Secondary Containment Airlock were reported to be open. The doors being open at the same time caused a failure to meet SR 3.6.4.1.2 to verify that either the outer door(s) or inner door(s) in each Secondary Containment access opening are closed. The identified condition caused Secondary Containment to be considered inoperable per TS LCO 3.6.4.1. Upon discovery, immediate action was taken to close the doors. The doors were open concurrently for a momentary amount of time. The action to close the door allowed SR 3.6.4.1.2 to be met, and restored Secondary Containment to an operable status. The notification is being made pursuant to 10 CFR 50.72(b)(3)(v)(C). The NRC Resident Inspector has been notified. The licensee is investigating how the electrical interlock failed to prevent this occurrence.

ENS 50989 +/-
Where
Duane Arnold Iowa (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
LER:	05000331/LER-2015-001-01 LERs 15-001-01 and 15-003-01 for Duane Arnold Regarding Both Doors in Secondary Containment Airlock Opened Concurrently 05000331/LER-2015-003 Regarding Both Doors in Secondary Containment Airlock Opened Concurrently
Time - Person (Reporting Time:+-0.23 h-0.00958 days <br />-0.00137 weeks <br />-3.15054e-4 months <br />)
Opened:	Hans Olson 18:06 Apr 16, 2015
NRC Officer:	Mark Abramovitz
Last Updated:	Apr 16, 2015
50989 - NRC Website Loading map...
v • d • e

v t e Emergency Notification System
Duane Arnold with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
WEEKMONTHYEAR2018-07-09T05:00:00 [Table view]
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