According to the Science journal, fission reactions again occur in the uranium fuel masses inside the Shelter facility at the Chernobyl Nuclear Power Plant. Scientists say that the fission reaction accelerates exponentially, which can lead to an uncontrolled release of nuclear energy. The explosive reaction threatens to collapse unstable parts of the Shelter and fill the interior of the new protective structure with radioactive dust. The increase in the number of neutrons is also confirmed by Ukrainian scientists, but there is not enough funding for the necessary monitoring and further solution of the problem.