From moving clouds to sowing crops, Chernobyl can help Japan

Concerns have grown over the unraveling crisis at the Fukushima power station as Japan struggles to cool down nuclear fuel rods after cooling systems were knocked out by the devastating earthquake and tsunami.

While the scope of the catastrophe is not likely to reach the levels of the 1986 Chernobyl disaster under the Soviet Union, Russian experts said Japan could minimise damage by using its experience like seeding clouds and recultivating agricultural land.

"The experience of Chernobyl should be used," said Alexey Yablokov, a radiobiology expert and former environmental advisor to Russia's first president Boris Yeltsin.
In the immediate aftermath of the accident, it is important that Japan and neighbouring countries control the spread of radioactive materials accumulated in the clouds and ensure that they do not fall over large cities, he said.

Consequences for Moscow and other large industrial cities in central Russia could have been much more serious if the Soviet government had not carried out cloud-seeding, the process of artificially altering clouds to change the weather.

"It was a secret programme, and ethically it is questionable -- Moscow was saved from radioactive rains at the expense of smaller cities," said Yablokov.

Clouds on the way to the capital were seeded with various chemicals and fell on the outlying regions of Tula, Ryazan and Kaluga instead.

Clouds bearing radionuclides from Fukushima could be forced to precipitate over the Pacific Ocean before they reached cities such as Russia's Vladivostok, which is home to about 600,000 people.

The weather control practice is frequently used by Moscow to guarantee clear skies. Former city mayor Yury Luzhkov was criticised for causing rain in the neighbouring regions on days of celebrations in the capital, such as World War II Victory Day parades.

"There should be planes ready with a load of re-agents like silver iodide. One can even use cement" in order to make rain fall over the ocean instead of large cities where it would cause an enormous health hazard, said Yablokov.

While Fukushima's reactor type is not likely to spew as much radioactive material as Chernobyl -- where burning graphite caused it to go up several kilometers and fall out over an extensive area -- other factors like nuclear fuel containing plutonium pose new risks, experts said.

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