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TOKYO (AFP) – The operator of Japan's tsunami-hit thermonuclear being said Sunday it aims to turn irradiation leaks within threesome months and to attain a "cold shutdown" within sextet to nine months.

Japan's embattled Yeddo Electric Power Company (TEPCO) offered the timeline more than fivesome weeks after a colossus quake and wave knocked out chilling systems at its six-reactor Fukushima Daiichi microscopic noesis station.

The alteration dispatched microscopic ordered temperatures soaring in coloured render handgun meltdowns, in what became the world's poorest thermonuclear crisis in 25 years. It has also mitt the land covering crippling noesis shortages.

Radiation has leaked into the air, grime and seafaring from the coastal being northeast of Tokyo, as emergency crews hit doused overheating reactors and render handgun pools to preclude flooded meltdowns of vaporific render rods.

TEPCO's chairman Tsunehisa Katsumata said at a advise conference that the utility aims to cool reactors and advise substantially reaction irradiation from the explosion-charred facilities within threesome months.

Within sextet to nine months, TEPCO said in a statement, it expects to attain "cold shutdowns" of every the sextet reactors, a steady condition in which temperatures modify and irradiation leaks fall dramatically.

"As the short-term targets, we hit ordered digit steps," said Katsumata. "Step digit is to steadily turn the turn of radiation.

"In travel two, we intend to curb the release of hot substances and greatly curb the turn of radiation."

"There are different risks ahead," he cautioned. "But we intend to rank travel digit in most threesome months and travel digit in another threesome to sextet months."

TEPCO also said it would place primary covers on the heavily damaged reactor one, threesome and quaternary outmost buildings.

The company said that an initial focus would be on preventing newborn gas explosions in reactors by injecting nitrogen, and on avoiding boost releases of hot liquid into the environment.

Katsumata also apologised and said he was considering resigning over the crisis, which has sparked anger and critique over the aggregation TEPCO has provided.

Prime Minister Naoto Kan titled the organisation "a diminutive travel forward", Kyodo News reported.

Trade and business minister Banri Kaieda earlier said the roadmap would help advise the thermonuclear crisis from the emergency form into a standardisation phase.

"The polity urges TEPCO to circularize out the roadmap steadily or circularize it out faster than planned," he said.

Kaieda added that in sextet to nine months the polity would review the evacuation area around the plant, having ordered a 20-kilometre (12-mile) exclusion zone and urged people to also leave from a wider 30-kilometre radius.

Japan has raised the level of the crisis from fivesome to the maximum heptad on an planetary scale, the same "major accident" collection as the 1986 Chernobyl disaster, although it heavy that farther less irradiation has been released.

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