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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, 19-11-1991
ERF description: While connecting DG-5 to essential bus during routine test the bus section was deenergized. This caused the stop of TG2 lub-oil system pump fed by this bus. Due to defect in standby feature activation system the standby oil pump failed to start. A signal of oil tank level and oil pump discharge pressure decrease was formed and TG-2 was tripped by protection system. Reactor power was reduced to 50% nom. by TG trip protection. The cause of bus failure was wrong connection of DG5 power cable to the bus after maintenance.
BASIS FOR RATING: Initiator - essential bus deenergization. Event expected, real. Safety function availability within safe operation limits and conditions, which corresponds to level 1/2 (B-1R). The event showed personnel errors, that demonstrate poor "safety culture", therefore the maximum level has been chosen.
DIFFICULTIES IN RATING:
ERF rating date: 18-11-1991
ERF contact person: Mr. V.I. Andreev
ERF address: Kitaisky Proezd 7, 103074 Moscow, Lithuania
ERF affiliation: Min. of Nuclear Power and Industry, of the USSR, Dept. of Principle, Accident Dispatch

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