Stichting Laka

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: Safety System train 3 DG started on 6 kV bus deenergization. This was followed by DG trip by the maximum current protection of the DG excitation system. After connecting the essential bus to the service bus and following unsuccessful attempt to start the service water pumps for essential consumers (SWPEs-5,6) damage to manway hatch of the service water system was discovered.
Essential bus deenergiztion was caused by the short circuit in the "redundant complex" cable provided for by initial design and later disconnected from one end only.
SS trains 1 and 2 testing was performed on time. 16 hours 55 min. later SS train 3 was successfully tested with sequential loading. During the event the unit was operating at 760 MWe power.
BASIS FOR RATING: Initiator - expected, real (essential bus deenergization). Safety function availability - within limits and conditions. According to Table A2 - level 1/2 (B-1R). Level 2 has been chosen since the event reveals safety culture deficiencies.
DIFFICULTIES IN RATING:
ERF rating date: 18-11-1991
ERF contact person: Mr. V.I. Andreev
ERF address: Kitaisky Proezd 7, 103074 Moscow, Ukraine
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