Radioactive Hazard ReleaseChemical Hazard ReleaseCesium RadioisotopesRadioactive PollutantsRadioactive FalloutNuclear Power PlantsRadiation MonitoringFukushima Nuclear AccidentSoil Pollutants, RadioactiveRadioisotopesTritiumAutoradiographyIodine RadioisotopesTime FactorsProportional Hazards ModelsMaterials Testing