The minimum of Uranium needed to sustain chain reaction is called critical mass. It is 10 kg.
/wp-content/uploads/2021/04/logo-2.png00kp-web-admin/wp-content/uploads/2021/04/logo-2.pngkp-web-admin2022-01-15 13:40:262022-01-15 13:40:26^Critical mass
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