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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, 22-11-1996
ERF description: On 21 November 1996, it was discovered that a 15 cm diameter unfiltered containment ventingline was actually open to the outside air, while its 4 block valves all registered "closed". It appeared that the valves had all been mispositioned, apparently as a result of maintenance work 9 months earlier.
The deviation was corrected within 2 hours. The 4 valve ball spindles were 90 degrees rotated with respect to the motor drives and correctly attached to the position indicators.
Justification:
Based on the Users Manual Table I: Criteria for Degradation of Defence in Depth without an initiator, with frequency medium and safety function inadequate the event is classified as level 2.
ERF rating date: 22-11-1996
ERF contact person: Mr. F.W. van Iddekinge
ERF address: P.O. Box BD 16191, NL-2500 BD The Hague, Netherlands
ERF affiliation: Ministry for Housing, Spatial, Planning and Environment (VROM), Nuclear Safety Dept.(KFD)

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