Before revision: upright= 1.30 |Core of CROCUS, a small nuclear reactor used for research at the EPFL in Switzerland A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions .
After revision: upright= 1.2 |Core of CROCUS, a small nuclear reactor used for research at the EPFL in Switzerland A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reaction .