600 620 congresses environmentalaspects industrialapplications internationalcooperation management militaryaspects mixedoxidefuels(nuclearengineering) nuclearfuels nuclearindustry nuclearnonproliferation nuclearpowerplants oecdcountries plutonium plutoniumasfuel plutoniumindustry pollution radioactivepollution radioactivesubstances radioactivewastedisposal recycling safetyregulations securitymeasures spentreactorfuels storage unitedstates uranium wastedisposal