ENS 53871: Difference between revisions

v t e ENS Event
05:00 Feb 10, 2019
Title	Agreement State Report - Gauge Device Damaged by Molten Steel
Event Description	The following report was received from the Commonwealth of Kentucky via fax: KY RHB [Kentucky Radiation Health Branch] was notified by telephone on 2/12/2019 at 1315 EST by a representative from a specifically licensed facility, North American Stainless, that on Sunday, 2/10/2019, North American Stainless encountered a 'breakout' when molten steel escaped and poured onto billet caster molds located below a 'tundish' filled with molten steel. One of the molds attached to a Berthold Model No. LB300ML Mold Level Control fixed gauging device, serial number 9415, containing 1 mCi (37 MBq) Co-60 (source serial number 1819-11-15) was covered with the liquid steel encapsulating the source holder. After the steel and mold had cooled, it was freed on 2/12/2019 and segregated. The encapsulating steel rendered the device on-off mechanism (shutter) inoperable. Initial readings taken with a Ludlum 2241-3 survey instrument measured 6.25 mR/hr measured 12 inches directly in front of the window, and 1.25 mR/hr measured 90 degrees from the line of the window measured at a distance of 12 inches. Readings at the back of the source holder were 132 microR/hr measured at a distance of 12 inches. No overexposures have been reported. On 2/12/2019, Radiametric Technologies, a service provider located in Lorain, Ohio, requested reciprocal approval and was granted reciprocity on 2/13/2019 in order to assess and remediate the situation. The fixed gauging device involved in the incident was recently leak tested (test conducted on 7/31/2018) by Suntrac Services, League City TX. Radiametric Technologies, Lorain OH, recently tested the source holder on-off mechanism (1/31/2019) and it was found to be in good working order. North American Stainless is reviewing the incident to avoid future incidents involving 'tundish' failures. A full report will be provided once the remediation is complete. Reporting criteria in 10 CFR 30.50(b)(2). KY Report #KY190001

ENS 53871 +/-
Where
North American Stainless Ghent, Kentucky (NRC Region 1)
License number:	201-499-57
Organization:	Kentucky Dept Of Radiation Control
Reporting

Agreement State
Time - Person (Reporting Time:+79 h3.292 days <br />0.47 weeks <br />0.108 months <br />)
Opened:	Anjan (Aj) Bhattacharyya 12:00 Feb 13, 2019
NRC Officer:	Brian P. Smith
Last Updated:	Feb 13, 2019
53871 - NRC Website
v • d • e

v t e Emergency Notification System
North American Stainless with Agreement State
WEEKMONTHYEAR2019-08-07T04:00:00 [Table view]
[ENS list for North American Stainless]

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 Reporting criteria in 10 CFR 30.50(b)(2).
 KY Report #KY190001
-| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/20190221en.html#en53871
+| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/20190222en.html#en53871
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ENS 53871: Difference between revisions

Latest revision as of 08:30, 22 February 2019

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ENS 53871: Difference between revisions

Latest revision as of 08:30, 22 February 2019

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