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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: Wed, 04-12-1991
ERF description: During test of the hydraulic scram system with cold water after service of an electrical rod drive it was revealed that a group of rods did not respond to demand. The reason was that a manual service valve was closed. All the other corresponding valves were also closed. Normally these valves are closed when the reactor vessel head is put on or off. These procedures are governed by specific instructions. Due to misconception the operating personnel supposed that the valves were already open.
Basis for the rating: Chapter 4.4b, deviation from written instruction.
BASIS FOR RATING:
DIFFICULTIES IN RATING:
ERF rating date: 02-12-1991
ERF contact person: Mr. M. Sjoeberg
ERF address: P.O. Box 27106, S-102 52 Stockholm, Sweden
ERF affiliation: Swedish Nuclear Power Inspectorate, (SKI)

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