The accident occurred at Zaporozhia plant’s No 3 bloc, which houses a 1,000-megawatt reactor. The reactor was not affected. “There is no leak of radiation,” specified Volodymyr Demchyshyn, the newly appointed energy minister. Vladimir Demchyshyn said that the accident posed no risk. The plant currently produces one-fifth of Ukraine’s electricity. The accident left several dozen towns and villages without electricity. The Ukrainian energy minister has announced the country’s consumers could experience two-hour blackouts. Ukraine is producing about 50 percent of its electricity from 15 Soviet-built reactors at four operating nuclear power plants. The rest of the country’s power need is met by thermoelectric generation. The block which was shut down at Zaporizhia nuclear plan will come online on Friday following tests.