ENS 53612

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v t e ENS Event
04:00 Sep 17, 2018
Title	Unanalyzed Condition
Event Description	On September 17, 2018, a notification was made by [Specialty Fuel Facility] (SFF) Operations that during dissolution of depleted uranium in the Conversion Area, the Recovery scrubber system was shut down for maintenance. During the shutdown, a reduction in vacuum to the box ventilation was experienced and a small amount of NOx [Nitrous Oxide] was released into the room. As the result of BWXT's review of this event, it cannot be determined within the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> notification period that documentation is available to demonstrate that the condition has been analyzed in the [Integrated Safety Analysis] (ISA). BWXT is making this report per 10 CFR 70.61, Appendix A(b)(1), 'Any event or condition that results in the facility being in a state that was not analyzed, was improperly analyzed, or is different from that analyzed in the ISA, and which results in a failure to meet the performance requirements of 10 CFR 70.61 (i.e. high consequence events are highly unlikely and intermediate consequences are unlikely)'. The area is currently shutdown and in preparation for inventory. No material has been processed within the system since the event. BWXT is continuing to review the ISA documentation and will provide further updates as appropriate. The licensee notified the NRC Resident Inspector. * * RETRACTION AT 1315 EDT ON 9/20/18 FROM CHRIS TERRY TO JEFF HERRERA * * * BWXT is retracting Event Notification#53612 that was reported on September 18, 2018. The notification was made due to the fact that it could not be determined within the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> notification period that documentation was available to demonstrate that a NOx release from the Conversion Area dissolver had been analyzed in the ISA. Subsequently, BWXT located the documentation that the condition was analyzed and meets the performance requirements of 10 CFR 70.61. Additionally, new calculations of the current process were run and the results confirmed the original analysis. The licensee notified the NRC Resident Inspector. Notified the R2DO (Guthrie), NMSS Events and Fuels group (via email).

ENS 53612 +/- *RETRACTED*
Where
Bwx Technologies, Inc. Lynchburg, Virginia (NRC Region 2)
License number:	SNM-42
Reporting

Part 70 App A (B)(1)
Time - Person (Reporting Time:+34.25 h1.427 days <br />0.204 weeks <br />0.0469 months <br />)
Opened:	Chris Terry 14:15 Sep 18, 2018
NRC Officer:	Andrew Waugh Property "NRC officer" (as page type) with input value "Andrew Waugh " contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.
Last Updated:	Sep 20, 2018
53612 - NRC Website
v • d • e

v t e Emergency Notification System
Bwx Technologies, Inc. with Part 70 App A (B)(1)
WEEKMONTHYEAR2018-09-17T04:00:00 [Table view]
[ENS list for Bwx Technologies, Inc.]

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ENS Notification