Radioactive waste is a type of hazardous waste that contains radioactive material. The radioactivity of all radioactive waste weakens with time. Oxalic acid may increase the leaching of radionuclides conditioned in bitumen for radioactive waste disposal. The scientists were exposed to high levels of radiation and radioactive dust. Diamonds are dated by analyzing inclusions using the decay of radioactive isotopes. Many airports now have radiation detectors to detect the smuggling of radioactive materials. The unstable (radioactive) isotopes are either primordial or postprimordial. These natural reactors are extensively studied by scientists interested in geologic radioactive waste disposal. These are lists of nuclear disasters and radioactive incidents. It may cover events caused by chemical agents or radioactive materials. Borosilicate glasses are used for immobilisation and disposal of radioactive wastes. Use of a decontaminant specially made for radioactive iodine removal may be advised. See fission product yield for a comparison with other radioactive fission products. The AEC had a history of involvement in experiments involving radioactive iodine. Stored energy can occur in many forms&colon; chemical, mechanical, thermal, radioactive, electrical, etc.