620 appliedsciences congresses engineering environmentalaspects industrialapplications internationalcooperation management mechanicalengineering mixedoxidefuels(nuclearengineering) nuclearenergy nuclearengineering nuclearpowerplants oecdcountries plutonium plutoniumindustry radioactivepollution radioactivesubstances radioactivewastedisposal reactorfuelreprocessing recycling safetyregulations spacevehicles toxicology