ENS 51273

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v t e ENS Event
04:00 Jul 22, 2015
Title	Agreement State Report - Fixed Gauge with Shutter Stuck Closed
Event Description	The following report was received from the State of North Carolina (NC) via email: The licensee was performing routine maintenance and leak testing checks on a Berthold fixed nuclear density gauge when they discovered its shutter was stuck in the closed position. This maintenance record was dated for 7/22/2015 and listed that the device needed cleaning, showed signs of mild to moderate corrosion, the shutter failed to open, and replacement was necessary. The closed shutter was verified by a survey meter and its detector response. The [North Carolina] State was notified the following week, on 7/27/2015. The gauge manufacturer, Berthold, had already been contracted to dispose of the source and device. No exposures or radiation safety concerns have resulted from this failed shutter at this time and none are expected. The Berthold Fixed Nuclear Gauge is serial #6625, model# LB7440 with a Berthold source serial #1329, model #D7547, 20 mCi Cs-137 source (as of 5/98). The last leak test performed March 28, 2013, that passed according to Thermofisher (3 year leak test requirement). Berthold will perform another leak test before transporting off site. The cause of the stuck shutter is dirt and corrosion products that appear to be the leading cause of the shutter failing in the closed position. NC will follow up with the licensee to determine if dirt accumulation and corrosion occurred by operating in environmental conditions outside of the manufacturer's intentions. NC State report: NC NMED #150022.

ENS 51273 +/-
Where
Domtar Paper Company, Llc Plymouth, North Carolina (NRC Region 1)
License number:	NC RAM #094-0
Organization:	Nc Div Of Radiation Protection
Reporting

Agreement State
Time - Person (Reporting Time:+156.98 h6.541 days <br />0.934 weeks <br />0.215 months <br />)
Opened:	David Crowley 16:59 Jul 28, 2015
NRC Officer:	John Shoemaker
Last Updated:	Jul 28, 2015
51273 - NRC Website
v • d • e

v t e Emergency Notification System
Domtar Paper Company, Llc with Agreement State
WEEKMONTHYEAR2022-03-23T04:00:00 [Table view]
[ENS list for Domtar Paper Company, Llc]

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