Half Life and Nuclear Waste 0.0 / 5 ? PhysicsRadioactivityGCSEAQA Created by: asho glenoCreated on: 10-04-15 11:43 Unstable Nuclei emit radiation with each nucleus having an... equal chance of decaying next 1 of 9 Activity - The number of... alpha, beta or gamma particles detected per unit time 2 of 9 The half-life of a radioactive isotope is the average time it takes for the... number of nuclei of the isotope in a sample to halve 3 of 9 Or the time it takes for the count rate from a sample containing the isotope to... fall to half its initial level 4 of 9 Waste from nuclear power stations may remain... radioactive for thousands of years 5 of 9 The waste may contaminate or... irritate the environment 6 of 9 Low and intermediate level nuclear waste (e.g. Contaminated clothes or radioactive sources used in medicine) can be... encased in concrete and stored until it reaches safe radiation levels 7 of 9 High level waste (e.g. Nuclear fuel) is stored... underwater for 20yrs 8 of 9 It is then placed in concrete casks into... underground storage 9 of 9
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