ENS 52759: Difference between revisions
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| event date = 05/15/2017 CDT | | event date = 05/15/2017 CDT | ||
| last update date = 05/23/2017 | | last update date = 05/23/2017 | ||
| title = Agreement State Report - Potential Excessive Exposure | | title = Agreement State Report - Potential Excessive Exposure of Radiographer | ||
| event text = The following information was received from the Wisconsin Radiation Protection Section via email: | | event text = The following information was received from the Wisconsin Radiation Protection Section via email: | ||
On May 15, 2017, radiographers with Acuren Inspection, Inc. were performing radiography on a boiler at Verso Paper in Wisconsin Rapids, WI. They were utilizing an approximately 90 Ci Se-75 source, with a 17.5 HVL [Half Value Layer] collimator to perform shots through the boiler wall. The assistant radiographer would position a panel on the inside of the boiler wall and then move to the far side of the boiler. The main radiographer would then position the collimator for multiple shots from the outside of the boiler. They were in contact via radio. At approximately 7:45 p.m., following a shot, the main radiographer approached the collimator with his survey meter. As he approached, he realized the source had not yet been cranked in, and began walking back to crank it in. At that time, he was contacted via radio by the asst. radiographer. Setting down his survey meter, he had a 30-40 second conversation. Following the conversation, he forgot what he had been in the process of doing, and approached the collimator without his survey meter, and positioned it for the next shot. Turning to walk back, he spotted his survey meter on the ground halfway to the crank, remembered he had yet to crank it in, and realized he had been exposed. He was wearing a functioning alarming rate meter that did not alarm. | On May 15, 2017, radiographers with Acuren Inspection, Inc. were performing radiography on a boiler at Verso Paper in Wisconsin Rapids, WI. They were utilizing an approximately 90 Ci Se-75 source, with a 17.5 HVL [Half Value Layer] collimator to perform shots through the boiler wall. The assistant radiographer would position a panel on the inside of the boiler wall and then move to the far side of the boiler. The main radiographer would then position the collimator for multiple shots from the outside of the boiler. They were in contact via radio. At approximately 7:45 p.m., following a shot, the main radiographer approached the collimator with his survey meter. As he approached, he realized the source had not yet been cranked in, and began walking back to crank it in. At that time, he was contacted via radio by the asst. radiographer. Setting down his survey meter, he had a 30-40 second conversation. Following the conversation, he forgot what he had been in the process of doing, and approached the collimator without his survey meter, and positioned it for the next shot. Turning to walk back, he spotted his survey meter on the ground halfway to the crank, remembered he had yet to crank it in, and realized he had been exposed. He was wearing a functioning alarming rate meter that did not alarm. | ||
Latest revision as of 20:42, 1 March 2018
| Where | |
|---|---|
| Acuren Inspection, Inc. Wisconsin Rapids, Wisconsin (NRC Region 3) | |
| License number: | 133-2008-01 |
| Organization: | Wisconsin Radiation Protection |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+33.03 h1.376 days <br />0.197 weeks <br />0.0452 months <br />) | |
| Opened: | Kyle Walton 14:02 May 16, 2017 |
| NRC Officer: | Jeff Herrera |
| Last Updated: | May 23, 2017 |
| 52759 - NRC Website | |