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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: Tue, 25-07-1995
ERF description: Yonggwang unit 3 has been operated at full power since initial commercial operation of March 31, 1995. During normal operation, control power loss of main feedwater control system to steam generator no. 1 occurred due to slackness of the screw in direct current power supply board and then caused to close main feedwater control valve of steam generator no. 1.
Eventaully, steam generator level 'Lo' signal initated reactor and turbine trip.
Investigation revealed that the main contributor of this failure was manufacturing mistake. After tightening same kinds of all internal contacts, the plant was returned to operation on April 28, 1995.
There was no release of radioactive materials ouside the reactor building and no unplanned exposure to employees.
Justification: As full safety functions were available, the event is rated at level "0" as per user's manual Part III, Table II, A1.
ERF rating date: 07-07-1995
ERF contact person: Y.C. KANG
ERF address: KYUNGGI-DO, 427-760, GWACHEON CITY, South Korea
ERF affiliation: NUCLEAR INSPECTION AND ENFORCEM. DIV, MINISTRY OF SCIENCE AND TECHNOL., GOVERNMENT COMPLEX II

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