A thermal anomaly in which a control rod heated above the specified temperature limits at the Paks unit 4 nuclear station in Hungary will keep the unit off-line longer than expected, it has been reported.
The incident, rated Level 1 on the International Nuclear Event Scale by the Hungarian Atomic Energy Authority, occurred during a restart following routine maintenance that began 29 April.
The 440MWe Unit 4 of the VVER station will remain offline until the cause of the incident can be determined. The other three VVER-440 units remain in operation.
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