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The last working reactor at the Chernobyl nuclear power plant in the Ukraine
has been closed down at least until March in order to repair 263 cracks in its
cooling pipes. The other three reactors at the site have all been out of action
for a year or more and have little or no prospect of restarting. The Ukrainian
government has been resisting pressure from the West to close all the reactors,
which Western engineers say are unsafe.