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: Wed, 03-04-2002
ERF description: On February 24 the operators noticed trend of increase of the temperature of the axial bearing of the motor of the Reactor Coolant Pump #2 as indicated by one of the two temperature sensors. On February 25 morning the trend increased so the decision was brought to start manual shutdown of the plant to prevent the temperature of the bearing to go above 90 degrees C which is a limit set by the pump motor producer. The starting shutdown rate of 10 MW/min was later increased to 20MW/min but at 28% of the reactor power at 2:09 hours the reactor was manually tripped to keep the temperature limit. The trip sequence went in accordance with the design. The pressure transient on the secondary side caused a 7.6-mm pipe of the extraction steam to open and the leak damaged a local fire protection installation. The investigation of the event concluded that the cause of the high temperature indication was a deteriorated temperature sensor and not actual increase of the temperature.
ERF rating date: 02-04-2002
ERF contact person: Marjan F. Levstek
ERF address: Vojkova 59, 1113 Ljubljana, Slovenia
ERF affiliation: Slovenian Nuclear Safety Administration

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