Crossword clues for Radioactive 3 lettersAnswerClueNRCFed. radioactive-material overseerNRCAgcy. wtih a "Radioactive Waste" section on its websiteHOTRadioactiveACARadioactive element No. 84: Abbr.IONRadioactive atomNRCGovernment org. concerned with radioactive wasteRADIOACTIVE2013 Imagine Dragons hitRADIOACTIVITYSubject for 17 AcrossRADIOACTIVEEmitting nuclear ionsRADIOACTIVELike some dangerous isotopesRADIOACTIVITYWhat a Geiger counter measures ... or, as two words, what the ends of 20-, 26- and 48-Across areRADIOACTIVEType of falloutALPHAKind of radioactive decayCORIUMRadioactive mixture created by a nuclear reactor meltdownALPHA___ particles (radioactive decay emission)BETAKind of decay of radioactive particlesBETAPARTICLEProduct of certain radioactive decayURANIUMRadioactive elementCURIEMarie who coined the term "radioactivity"ISOTOPESSome are radioactiveMARIERadioactivity pioneer CurieCURIEScientist whose archived notebooks are still radioactiveRADSRadioactivity unitsIRISHSEAOne of the world's most radioactive waterways due to contamination from the Sellafield Nuclear PlantRADONRadioactive gasNOBELIUMRadioactive elementTRACERRadioactive element, at timesBETARAYRadioactive emissionENERU.S. dept. concerned with radioactive wasteHALFLIFE*Radioactive decay measureDECONRadioactivity cleanup, brieflyCURIERadioactivity unitBETARAYRadioactive decay streamSWEETNAGLOWLike radioactive sugar?CURIERadioactivity researcherCURIEUnit of radioactivityNOBELIUMRadioactive element with a once-disputed nameURANIUMRadioactive element named for a planetBETARAYEmission from radioactive decayACTINIUMRadioactive element that glows blue in the darkASTATINERadioactive elementDECAYExhibit radioactivityGEIGERCOUNTERItem in Schrödinger's box that detects if a radioactive particle decays, thus triggering a hammer to shatter 20 AcrossDECAYRadioactivity actionDECAYRadioactivity, essentiallyMARIERosamund's role in "Radioactive" (2019)CURIECoiner of "radioactivity"EMITTERAnything radioactiveMARIEANDPIERRECURIERADIOACTIVITYBOARAny of a big group of mutant radioactive beasts that have reached Germany from Chernobyl