Radiation Source

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Radiography overexposure

On September 16, 2010 the radiation safety officer of a licensed industrial radiography company notified the Regulatory Authority of an overexposure of a gammaradiography worker. The worker was exposed by a 0.4 TBq (11 Ci) cobalt-60 source, with the dose exceeding the annual dose limit 50 mSv for radiation workers. The incident occurred when the radiographer entered the bunker without retracting radiation source to its shielded position. The worker spent about 4 minutes in the bunker while replacing the radiography film.

Category: Radiation Source Finland »

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Extremity Overexposure

During an inspection conducted by the State regulator on 27 July 2010 (and reported to the NRC on 4 August 2010), it was discovered that an employee who works in the manufacturing of iodine-125 and palladium-103 brachytherapy seeds received an occupational exposure of approximately 519 mSv (51.9 rem) to an extremity (right hand) in December 2008. The individual also received approximately 167 mSv (16.7 rem) to the left hand and 6.1 mSv (605 mrem) whole body dose. The licensee did not recognize the exposure and did not report it as required to the regulator when it occurred.

Category: Radiation Source United States of America »

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Contamination of 6 workers during the recovery of a gammagraphy Co-60 source

Six workers participating in the task of unblocking a high activity radioactive source of cobalt-60 (1.25 TBq) were contaminated in Feursmetal premises (Feurs, Loire). The Co-60 source was blocked since May 7 in the guide tube of a gammagraphy device which was located in a hot cell of the Feursmetal company.

Category: Radiation Source France »

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Worker Overexposure

During industrial radiography operations, a radiographer approached the camera, believing the source to be in the shielded position. The radiographer did not have his survey meter, but was wearing an alarming ratemeter and a pocket dosimeter. The radiographer was attempting to put the safety plug on the end of the camera when he realized the source was not in the shielded position.

Category: Radiation Source United States of America »

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Contamination of a vehicle with Cs-137

On 28 August 2009 on the customs points (Sadakhlo and Bagratashen) on the border of Armenia and Georgia 137Cs contamination of a vehicle was detected during radiation control. The vehicle belonged to a resident of Noratus village of Gegharkunik region, Armenia.

Category: Radiation Source Armenia Georgia »

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Worker Overexposure

A radio-pharmacist was preparing Fluorine-18 (F-18) doses for use, when a manipulator malfunction occurred. The radio-pharmacist continued to prepare the F-18 manually instead of stopping the process. This led to a potential dose to the radio-pharmacist's right hand of greater than 0.5 sieverts (50 rem). This dose is a rough estimate from whole body dose values and reconstruction of the event due to the fact the radio-pharmacist was not wearing any dosimetry on the extremity.

Category: Radiation Source United States of America »

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Radiographer Overexposure to Extremity

On September 29, 2008, a radiographer was performing radiographs in various locations at a work site in Houston, Texas. He was using a camera that contained an Ir-192 source with an activity of 3.1 TBq (85 curies). At one point, the radiographer removed the plug off the front of the camera to test the guide tube, however his alarming dose rate meter began to alarm. He then noticed that the source had come out of the camera about 1.3 cm.

Category: Radiation Source United States of America »

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Overexposure of a worker

On September 25 th the CSN was informed through the Radiopathology National Hospital that an industrial radiography operator suffered from radiological skin injuries, on the fingertips of three fingers on his right hand. The operator complained of tightness in his fingers 24 hours and developed a blister and erythema 48 hours later of an incident involving an event with an remote portable industrial gammagraphy device with 0,8 TBq (21,4 Ci ) of Iridium-192 .

Category: Radiation Source Spain »

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Radiographer Overexposure

On September 2, 2008, a team of three radiographers, consisting of the main radiographer and two assistants, were performing radiographs of pipeline welds near Ardmore, Oklahoma.
The camera, which contained an Ir-192 source with an activity of 4.1 TBq (111 curies) was mounted on an all terrain vehicle. Assistant #2 was responsible for positioning the camera and making exposures at each weld.

Category: Radiation Source United States of America »

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Potential Overexposure During Co-60 Source Exchange

On July 21, 2008, two radiation workers, A and B, one American and one Brazilian, respectively, had received a potential overexposure. While in a hospital in the State of São Paulo, Brazil, they were in the process of exchanging an expended cobalt-60 source with a new cobalt-60 source. After engaging the source holder with the removal tool, worker A transferred the source holder from the unit head into the transfer cask. Once the source holder was in the transfer cask, worker A continued making preparations to complete the removal sequence.

Category: Radiation Source Brazil »