ENS 48848

v t e ENS Event
13:20 Mar 25, 2013
Title	Agreement State Report - Internal Lead Shielding of Gauge Source Holders Melted
Event Description	The following information was received via facsimile: The Alabama Office of Radiation Control received a call at 0820 CDT on 3/25/13 from Dr. Michael Hensley of RSO Services (AL license No. 1482), a gauge service company. He had been contacted by IIG, MinWool, LLC in Phenix City, AL (AL license No. 986) to assist them with an issue. The licensee melts rock in a cupola to make insulation. The cupola has two Ohmart Model SR-A devices, one at the top and one at the bottom of the cupola, each containing a 100 mCi Cesium-137 source. The cupola was superheated to about 3,500 degrees Fahrenheit above the operating limits for the Model SR-A devices. It is believed the lead shielding in the devices liquefied, but because the source holders are sealed, the lead was contained inside the devices and did not leak out. Dr. Hensley surveyed the devices and found a maximum reading of 2.5 mR/hr at 12 inches from the back of the device which was located at the top of the cupola. This is lower than the design maximum exposure of 4.8 mR/hr with a 100 mCi source per the SSDR. The shutters on both devices were still operable, and were closed and locked. Dr. Hensley will remove the devices and prepare them for shipment to Ohmart. Alabama Incident No.: 13-09

ENS 48848 +/-
Where
Iig, Minwool, Llc Phenix City, Alabama (NRC Region 1)
License number:	986
Organization:	Alabama Radiation Control
Reporting

Agreement State
Time - Person (Reporting Time:+-1.25 h-0.0521 days <br />-0.00744 weeks <br />-0.00171 months <br />)
Opened:	David Walter 12:05 Mar 25, 2013
NRC Officer:	Donald Norwood
Last Updated:	Mar 25, 2013
48848 - NRC Website
v • d • e

v t e Emergency Notification System
Iig, Minwool, Llc with Agreement State
WEEKMONTHYEAR2013-03-25T13:20:00 [Table view]
[ENS list for Iig, Minwool, Llc]

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