FUKUI – The Fukui Prefectural Government said Tuesday it has found larger-than-permitted flaws in 339 of the 10,097 heat transfer tubes for steam generators at a nuclear reactor operated by Kansai Electric Power Co. in Takahama, Fukui Prefecture.
These flaws at the No. 4 reactor of the Takahama nuclear power station have had no impact on the environment, prefectural officials claimed.
Kepco will cap all the flawed tubes and suspend their use, they said. The 870-mw pressured-water reactor has been undergoing regular checks.
The officials attributed the flaws in the tubes to chafing caused by contact with metal fittings that help prevent vibration.
The announcement came after police searched another Kepco nuclear power station in the same prefecture Saturday for evidence of professional negligence in connection with a fatal accident in August.