. . "300652351"@en-us . "300652351"^^ . . "supercritical"@en-us . "300621646"@en-us . "supercritical"^^ . "300615249"@en-us . . "0"^^ . . "00652351-a"^^ . "(especially of fissionable material) able to sustain a chain reaction in such a manner that the rate of reaction increases"@en-us . "0"^^ .