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Event Report Forms (ERFs) are filed to the IAEA. Sometimes there are multiple event reports, updating the rating, the event description. Here you only see the latest event report

ERF send date: Fri, 16-08-2002
ERF description: A company licensed to perform well logging discovered that a source containing 44 GBq (1.2 curies) of cesium-137 was missing. The company recovered the source at a location where the source had been used two days earlier for a drilling rig operator not licensed to possess radioactive materials. The source was intact. The company determined that 31 nonradiation workers were exposed to the source while it was uncontrolled. It was determined through exposure rate measurements, coupled with time and motion studies, that the maximally exposed individual received 6.4 cSv (rems); 10individuals received exposures between 2 and 6.4 cSv; 15individuals received exposures between 1 and 2cSv; and 6 individuals received exposures less than 1 cSv. No adverse health effects are expected to any of the exposed individuals. The company concluded that the cause of the source being uncontrolled at the drilling rig was the failure of the well logging crew to follow standard operating procedures which require that multiple radiation surveys be conducted to verify the presence of the source in its shield. Apparently, none of the required surveys were performed by the crew.
ERF rating date: 02-07-2002
ERF contact person: Joseph J. Holonich
ERF address: Washington, DC 20555, USA
ERF affiliation: USNRC

This map shows a selection of reports from nuclear and radiological incidents stored in the IAEA NEWS-database.
Locations are estimates. Contact us if a location is wrong.
The map shows a maximum of 100 incidents. If hundred incidents or more are within the map, the yellow perimeter indicates from where events are excluded. Drag or zoom the map to explore different areas.

Power Reactor Research Reactor Radwaste Facility Enrichment Facility Radiation Source Irradiation/Accelerator Facility Transportation

Fuel Fabrication Fuel Reprocessing Research Facility Mining/Milling Radioisotope Processing/Handling Facility Other