The operator of the Fukushima nuclear plant in Japan said that steam had been spotted at the battered reactor for the second time in days and disappeared in hours.
Steam was seen around the fifth floor of the building housing Reactor No 3 Tokyo Electric Power Co (TEPCO) said on Tuesday.
The steam has raised concerns about the damaged reactor, but TEPCO said no significant changes occurred, including in the levels of potentially cancer-causing radioactivity the broken reactor is releasing.
Steam was spotted in the same area on Thursday last week but had disappeared by the next day without any cause known. TEPCO said it was looking at the possibility that accumulated rainwater had been the source.
Continue reading at More steam rising from Fukushima reactor