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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, 28-08-2003
ERF description: On August 27 at 09:15 after three months of stable operation since last refueling outage in May 2003, reactor trip with safety injection actuation occurred. Reactor trip and safety injection was initiated by main steam line Lo-Lo pressure signal as the consequence of unexpected closure of the main steam line isolation valve while performing surveillance testing. All safety, control systems and plant equipment responded in accordance with design requirements. Unusual event was declared based on rapid depressurization on secondary side of the plant. Unusual event was terminated after two hours. Plant was stabilized at "No-load" parameters and restarted after 19 hours and connected to the power grid.
Preliminary analysis and evaluation indicates failure of limit switch which caused closure of the main steam isolation valve.
There was no impact to the environment or plant personnel.

ERF rating date: 28-08-2003
ERF contact person: Marjan F. Levstek
ERF address: Zelezna c. 16, P.O.BOX 5759, SI-1001 Ljubljana, Slovenia
ERF affiliation: SNSA

This map shows a selection of reports from nuclear and radiological incidents stored in the IAEA NEWS-database.
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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