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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, 22-08-1990
ERF description: While testing automatic activation of 6 kV auxiliary power bus standby source of Unit 1 which was in maintenance and due to switching overvoltages, standby boiler's 6 kV cable insulation was damaged resulting in cable short-circuiting and burning. This resulted in the damage to Unit 2 cables laid nearby, deenergizing of two 6 kV auxiliary power buses, loss of power to two reactor coolant pumps causing the actuation of reactor scram. Breach of safe operation limits and conditions did not occur. Radiation situation remained normal. No injuries occurred while extinguishing the fire.
Intitial event - cable burning. Event expected, real. Safety function availability: full. Table 1: A-1R - level 0/1. It was found that the non-design cable was used. Units 1 and 2 cables were laid together which constitutes violation of procedure, therefore level 1 has been chosen.
BASIS FOR RATING:
DIFFICULTIES IN RATING:
ERF rating date: 01-08-1990
ERF contact person: Mr. V.I. Andreev
ERF address: Kitaisky Proezd 7, 103074 Moscow, Russian Federation
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