ENS 51779

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v t e ENS Event
04:33 Mar 7, 2016
Title	Agreement State Report - Unable to Retract Radiography Camera Source
Event Description	The following report was received from the State of Mississippi via facsimile: The Licensee notified DRH [Mississippi Department of Radiation Health] on 3/7/2016, that an incident had occurred at 2233 [CST on 3/6/16], at the client's site [in Holly Springs, MS]. The Licensee's two (2) man radiography crew was performing radiography inside a twelve (12) foot, open end vessel, thirty six (36) feet long, and nine (9) foot off the ground. The radiography camera in use was a Sentinel model 880D, serial No. D1120. During one exposure the guide tube became crimped preventing the source from retracting back into the camera. This was due to the camera falling off the scaffolding to the vessel floor while the radiographer was retracting the source. The resulting action caused the guide tube connected to the camera and magnetic stand to become crimped at the camera connection point. The licensee's radiography supervisor was notified and the restricted area boundary was increased by the two (2) radiographers. Source retrieval was performed by the radiography supervisor with assistance from the radiography crew. A survey was performed using a NDS, ND-2000, SN: 20113, Calibration date: 1/15/2016, at the opposite end of the vessel thirty two (32) feet away from the source revealing a reading of two hundred twenty (220) mR/hr. A decision was made to pull the camera to one opening of the vessel by the camera cranks. The restricted area was then readjusted for two (2) mR/hr. While the camera was being lowered to the ground with a guide rope out of the vessel opening, the guide tube became straight enough to allow for source retraction. The guide tube and magnetic stand hung at the opening of the vessel causing the guide tube to straighten out from the weight of the camera below the vessel opening. The radiographers made another attempt to retract the source with success when the guide tube was straight. Once the camera was on the ground, the Licensee's survey of 46 mR/hr confirmed the source was retracted back into the camera. Doses to the radiography crew and supervisor were all below 60 millirems (mR). Instadose radiation badges were used with the highest dose reported of thirty nine (39) mR to both radiographers. Pocket dosimeters were also used with the highest dose reported by the radiography supervisor of fifty five (55) mR. Licensee's written report was received on 3/7/2016. The camera has been removed from service pending a sealed source and DU wipe test. Implemented corrective actions included adequate lighting at night and tying the camera off when it is used over twelve (12) inches off the ground. The radiography camera contains a 79.9 Ci Ir-192 Source, model A424-9, serial number 28799G. The State of Mississippi instructed the licensee to submit a 30 day written report and considers this case to be closed. Mississippi State Report number: MS-16002.

ENS 51779 +/-
Where
World Testing, Inc. Mount Juliet, Tennessee (NRC Region 1)
License number:	MS-1035-01
Organization:	Mississippi Div Of Rad Health
Reporting

Agreement State
Time - Person (Reporting Time:+35.02 h1.459 days <br />0.208 weeks <br />0.048 months <br />)
Opened:	Jayson Moak 15:34 Mar 8, 2016
NRC Officer:	John Shoemaker
Last Updated:	Mar 8, 2016
51779 - NRC Website
v • d • e

v t e Emergency Notification System
World Testing, Inc. with Agreement State
WEEKMONTHYEAR2024-03-06T06:00:00 [Table view]
[ENS list for World Testing, Inc.]

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