1024LectureFile19b

1024LectureFile19b - Radioactive Waste Waste materials that...

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1 Radioactive Waste •Waste materials that are radioactive or emit ionizing radiation. •Amount of hazard depends on the amount of radiation above background. –NIMBY is a huge problem. •Many concerns arise from a lack of understanding.
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2 Radioactivity vs. Radiation (1) •Radioactivity: Spontaneous, random decay of unstable atomic nuclei. •Measured in (units): –1 Curie (Ci) = 3.7 x 10 10 disint/second. –Smoke detectors have a few picocuries (10 -12 Ci).
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3 Radioactivity vs. Radiation (2) •Radiation: Any energy that is emitted. Ionizing: Can knock electrons off atoms. Non-ionizing: Much lower energy. –Alpha and beta particles, neutrons. –X-rays and gamma rays. –Visible light, microwaves, infrared, ultraviolet.
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4 Radioactivity vs. Radiation (3) •Ionizing radiation measured in (units): –1 Roentgen (R) = 87.8 ergs/second in air. –1 erg = 9.5 x10 -11 BTU. •Radiation exposure is measured differently. –This is what we really care about.
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1024LectureFile19b - Radioactive Waste Waste materials that...

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