ENS 49524: Difference between revisions

v t e ENS Event
18:45 Nov 8, 2013
Title	Apparent Deterioration of Primary and Secondary Hepa Filters
Event Description	On November 8, 2013, at approximately 1045 PST, an Air Balance Technician at AREVA NP's Richland fuel fabrication plant discovered that the primary and secondary HEPA filters servicing the ammonium diuranate (ADU) area showed visible signs of deterioration. The apparent deterioration is being reported in accordance with 10 CFR 70.50(b)(2). The K-32A HEPA filters were examined by air balance personnel at approximately 1045 PST on November 8, 2013 based on a request to follow-up on some stack monitoring results which indicated some elevated levels (still below required administrative action levels). Air flow was diverted to HEPA filters in a parallel upper housing in order to check the filters in the lower housing. Investigation showed apparent deterioration of both the primary and final HEPA filters. The processes running at the time served by these HEPAs were the ammonium diuranate process, miscellaneous uranium recovery process, and cylinder wash. Air monitor samples were pulled on the K-32A system. Air monitoring samples showed negligible release levels. A Health and Safety Technician survey of the downstream side of the final HEPA housing of K-32A revealed no surface contamination above 'clean' criteria. Potential dose to a member of the public and the effect on the environment are essentially negligible. External conditions are not known to have affected the event. A Corrective Action Report, 2013-8809, was written on November 8, 2013. The cause of the apparent deterioration is under active investigation. Steps to prevent recurrence will be developed as appropriate. The licensee will notify the NRC Regional office and the Washington State government.

ENS 49524 +/-
Where
Areva Np Inc Richland Richland, Washington (NRC Region 2)
License number:	SNM-1227
Reporting

10 CFR 70.50(b)(2)
Time - Person (Reporting Time:+-0.58 h-0.0242 days <br />-0.00345 weeks <br />-7.94484e-4 months <br />)
Opened:	Robert Link 18:10 Nov 8, 2013
NRC Officer:	Daniel Mills
Last Updated:	Nov 8, 2013
49524 - NRC Website
v • d • e

v t e Emergency Notification System
Areva Np Inc Richland with 10 CFR 70.50(b)(2)
WEEKMONTHYEAR2013-11-08T18:45:00 [Table view]
[ENS list for Areva Np Inc Richland]

@@ Line 3: / Line 3: @@
 | facility = Areva Np Inc Richland
 | Organization =
-| license number = Snm-1227
+| license number = SNM-1227
 | region = 2
 | state = Washington

ENS 49524: Difference between revisions

Latest revision as of 18:11, 24 November 2018

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ENS 49524: Difference between revisions

Latest revision as of 18:11, 24 November 2018

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