ENS 53508
ENS Event | |
|---|---|
04:00 Jun 25, 2018 | |
| Title | Agreement State Report - Radiography Camera Source Unable to Retract |
| Event Description | The following information was received via email.
North Carolina (NC) Radioactive Materials Branch (RMB) is submitting the following reportable event: Radiography Camera Source Unable to Retract. Reportable per: 10 CFR 30.50(b)(2) & 10 CFR 34.101(a)(2) Event Date & Discovered Date: 6/25/18 Date Reported to RMB: 6/26/18 Location where event took place: Stoneville, NC Reporting Licensee: Applied Technical Services [ATS] NC License Number: 1510-1 Radiography Camera Manufacturer: QSA Global, Inc. Radiography Camera Model #: Delta 880 Radiography Camera S/N: D5059 Source: Ir-192 Source Activity: 71.4 Ci Source Manufacturer: QSA Global, Inc. Source Model #: A424-9 Source S/N: 65909G While conducting radiography shots at a water tank construction site, ATS radiography crew experienced a source hang up. Radiographers initially believed the cause to be a crimped guide tube due to source not moving in either direction. While maintaining a 2 mR/hr boundary, additional personnel were dispatched to the work site by ATS with additional shielding material and [the] RSO [radiation safety officer] who is responsible for source retrievals. Lead blankets were placed on the guide tube and the RSO determined that the guide tube was not compromised, kinked, crimped or otherwise damaged. Probable cause was determined to be in the control assembly. RSO unthreaded the guide from the outlet adapter and exercised the controls with no effect. Guide tube was reconnected and RSO began to troubleshoot the connection side of the camera by removing the housing from the connection to observe the cable while again exercising the controls. Cable would flex but was observed to be either wedged or pinned at the connector. During this process, it was observed that since the cable would not flex on the outlet side of the camera it was determined that extreme force on the controls side would not result in the cable being disconnected from the pig tail. The housing was reattached, and extreme force was used on the controls to break the cable free and the source was returned to its secured and shielded position. The RSO observed the control assembly crank did have more movement than usual, and root cause was determined to be debris from a damaged bearing that had moved down the control cable housing and locked up the controls. This equipment had quarterly maintenance and weekly inspections conducted on it. [The] controls were shipped to QSA for repair or disposal. All personnel involved in the source retrieval received doses well within annual limits for radiation workers. RMB has concluded its investigation and consider this event Closed & Complete. No other agencies were informed of this event and no other generic issues identified. NMED Event ID: 180329 NC Tracking ID: 180029 |
| Where | |
|---|---|
| Applied Technical Services Stoneville, North Carolina (NRC Region 1) | |
| License number: | 1510-1 |
| Organization: | Nc Div Of Radiation Protection |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+532.97 h22.207 days <br />3.172 weeks <br />0.73 months <br />) | |
| Opened: | Travis Cartoski 08:58 Jul 17, 2018 |
| NRC Officer: | Ossy Font |
| Last Updated: | Jul 17, 2018 |
| 53508 - NRC Website | |
Applied Technical Services with Agreement State | |
WEEKMONTHYEARENS 567422023-09-14T22:00:00014 September 2023 22:00:00
[Table view]Agreement State Stuck Source ENS 555022021-09-30T05:00:00030 September 2021 05:00:00 Agreement State Unretractable Source ENS 554222021-08-12T05:00:00012 August 2021 05:00:00 Agreement State Loss of Protective Cover Over Locking Mechanism ENS 535082018-06-25T04:00:00025 June 2018 04:00:00 Agreement State Agreement State Report - Radiography Camera Source Unable to Retract 2023-09-14T22:00:00 | |