Overexposure of two workers

Print View Posted on: 13 May 2019

Event Date: 18 December 2018 Event Type: Radiation Source
Event Location: Iran, Islamic Republic of, KHORASANE RAZAVI province INES Rating: 3 (Provisional)

On 2nd of January 2019, National Radiation Protection Department (NRPD) was received a report regarding the overexposure of two workers on 18th of December 2018. According to the report of the licensee that is a private company, after the performance of industrial radiography in KHORASANE RAZAVI province, two workers found that the holder (contain 80 Ci, Ir-192) was not in its place. Due to the detachment of the holder, it remained in the guide tube during radiography. The workers were not worn any kind of dosimeters. The holder was returned to the projector using the handling tongs, transit container and etc.
At the time of receiving the report by NRPD, two workers suffered from Local Radiation Injury (LRI). Considering the results of cytogenetic analysis, the whole body doses to the workers A and B were estimated to be about 400 mSv and 264 mSv.
The doses of the left and right hands of worker A and right hand of worker B were estimated to be less than 50 Gy, 40 Gy and 15 Gy, respectively. They were received appropriate medical treatment.

INES Rating: 3 - Serious incident (Provisional) as per 13 May 2019
Release beyond authorized limits? No
Overexposure of a member of the public? No
Overexposure of a worker? Yes

Contamination spread within the facility? No
Damage to radiological barriers (incl. fuel damage) within the facility? No

Degradation of Defence In-Depth No

Person injured physically or casualty? Yes
Is there a continuing problem? Yes

Hojatollah Salehi
Iran Nuclear Regulatory Authority (INRA)

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