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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: Thu, 23-01-1997
ERF description: On January 17, 1997 at 100% power, there was a scram on turbine trip for spurious actuation of a relay Buchholz of main transformer. All safety systems called upon performed as expected, operators checked that control rods were fully inserted into the core. Hhowever, by reviewing post trip computer records, plus performing control rod drop times, it was noticed that: a) all control rods entered the dashpot (34 steps above core bottom, compared to total length of 228 steps) within the time established by Technical Specifications (TS), however: b) 3 out of 48 control rods suffered delays from step 6 or 12 to bottom.
Justification:
Table II: Severity classification criteria for degradation of defence-in-depth with an initiator, initiator: scram on turbine trip. Frequency: high/expected.
Safety function:reactor Protection System. Availability: within operational limits and conditions.
Rating: INES level 1.

ERF rating date: 22-01-1997
ERF contact person: J. Zarzuela
ERF address: Justo Dorado 11, Spain
ERF affiliation: Council for Nuclear Safety

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