Discovered Ra-226 source in copper scrap metals

Print View Posted on: 12 June 2022

Event Date: 27 February 2022 Event Type: Radiation Source
Event Location: Iran, Islamic Republic of, West border INES Rating: 0 (Final)

On 27th February 2022, the National Radiation Protection Department (NRPD) of Iran Nuclear Regulatory Authority (INRA) received an alarm from a Radiation Portal Monitoring System (RPMS) installed in west border of the country for monitoring trucks carrying imported goods. Reported count rate from the truck loaded with copper scrap metals was 4 times of the background. After investigation and monitoring of the scrap metals, the tip part of a lightning rod with ten screwed Ra-226 sources was found. The tip part was transported to Iran nuclear waste management company for more analysis and be wasted.

Estimated total activity of Ra-226 is 48 MBq (4.8 E-05 TBq). Considering D value and A/D are 4 E-02 and 1.2 E-03 respectively, it is Category 5 source.

Maximum effective dose to radiation workers was about 61 ┬ÁSv and doses to members of the public were negligible.

INES Rating: 0 - Below scale (Final) as per 05 May 2022
Release beyond authorized limits? No
Overexposure of a member of the public? No
Overexposure of a worker? No

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? No
Is there a continuing problem? No

National Radiation Protection Department
Site Sponsors
Site Sponsors: IAEA, NEA and WANO
This site is hosted by the International Atomic Energy Agency (IAEA) and co-sponsored by the Nuclear Energy Agency of the Organization of Economic Cooperation Development (OECD/NEA) and World Association of Nuclear Operators (WANO).
This site is hosted by the IAEA, however, event reports are filed and updated by authorities in participating countries, which remain responsible for all related content. Read more >