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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: Tue, 30-03-1993
ERF description: Angra-1 had been experiencing some small fuel rods leakage since 4 months with primary water coolant activity indicating some percentage of Tech. Spec. limits. In 93.03.05 during a normal operation at 50% rated power a routine surveillance of reactor coolant activity detected values greater than the corresponding limiting conditions for operation. According to required actions the plant was immediately shut down following normal procedures. Preliminary estimations pointed out that around 100 fuel rods had failed. The utility is preparing defueling the core and inestigating the causes.
Basis for rating the event: 1) Event without an initiator (as per Table 1);
2) safety function challenged confining the radioactive material; 3) safety system operability (barrier - passive): less than minimum required by OL&C; 4) then safety function availability: adequate. rate selected: 1.
ERF rating date: 26-03-1993
ERF contact person: L.A. Vinhas
ERF address: RUA GENERAL SEVERIANO 90, Brazil
ERF affiliation: ACTING DIRECTOR FOR RADIATION, PROTECTION AND NUCLEAR SAFETY (DRS), NAT. NUCLEAR ENERGY COMM.

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