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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, 22-06-2006
ERF description: On 22/06/2006 Unit 4 was in operational state E1 (232 oC). At 06:30 while monitoring computer displays after shift turnover the reactor operator discovered that the temperature of CRD housing 6/7 exceeded the limit specified in TS 5.4.1.2.2 (max. 100 oC-5 min). Subsequently, the operator lowered the CR drives from lower end switch into lower end stop by manual scram, thereby deenergizing them. 4 out of 6 RCPs which had been operating until that time, were shut down (RCPs 2,4,5,6). After interpretation of the archive data personnel determined that the parameter excess has occurred earlier and has remained so for about 8 hours. Local inspections revealed that the inrease in temperature was caused by leakage of the closed valves 40TX25S215, S216 through which reactor coolant flowed from the upper block central venting line toward the makeup water system. Personnel stopped the leakage by re-tightening the valves.
ERF rating date: 22-06-2006
ERF contact person: József Gergely
ERF address: Paks NPP Ltd. H-7031. Paks pf.71.
ERF affiliation: Paks NPP Ltd.

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