Situation very serious in Japan: IAEA chief

Vienna: The UN atomic energy chief said he planned to fly to Japan on Thursday to seek first-hand information of what he called a very serious situation at a stricken nuclear power plant in his home country.

Director General Yukiya Amano of the International Atomic Energy Agency (IAEA) said he intended to request an extraordinary meeting of its 35-nation governing board as soon as possible after he returned to Vienna.

Amano's announcements of his trip and the board session made clear his growing concern over the crisis in Japan.

It also suggested frustration at the Vienna-based agency, which is tasked with fostering the safe use of nuclear energy, about the lack of speedy and detailed information from Japan.

"It is different to receive facts by email from Tokyo to sitting down with them and exchanging views," Amano told at news conference. "We always need to improve the flow of information."

Amano said he hoped to meet high-level Japanese officials but it was not decided whether he would go to the site of the severely damaged Fukushima plant during his one-day trip.

"It was not the time to say whether developments at the site had spiralled out of control, as suggested by a European Union energy official in remarks that sent global share markets lower," Amano said.

"The operators are doing the maximum to restore the safety of the reactor," Amano added.

He said the IAEA had continuously been trying to help improve the safety of nuclear power plants against earthquakes.

But he declined to comment on a report, in Britain's the Daily Telegraph newspaper, that US cables obtained by WikiLeaks said Japan had been warned more than two years ago by an IAEA official over the possible impact of earthquakes on nuclear power plants.

The unnamed official was quoted in the document as saying that "recent earthquakes in some cases have exceeded the design basis for some nuclear plants, and that this is a serious problem that is now driving seismic safety work".

In Japan early on Wednesday another fire broke out at the earthquake-damaged facility, which has sent low levels of radiation wafting into Tokyo in the past 24 hours, triggering fear in the capital and international alarm.

"It is a very serious situation," Amano said.