Across
- Steam from a nuclear reactor turns these to make power. (8)
- The longer the …………… of radioactive material, the more dangerous it is. (4, 4)
- Material based on this element is found in nuclear reactors. (7)
- Nuclear power plant in Ukraine where in 1986 a major accident caused a huge radiation cloud to spread across Europe. (9)
- A nuclear …………… relies on fission (splitting of atoms) to create heat that in turn boils water to create steam for making power. (7)
- Melting of this part of a nuclear reactor can lead to disaster if no water is available. (4)
- The half-life of Iodine-131 is about eight …………… (4)
- …………… Island is a nuclear power plant in the U.S. where in 1979 a major accident occurred but only a small amount of radioactive gases escaped. (5, 4)
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Down
- What do making a cup of coffee or tea and using nuclear fission to make power both have in common? (7, 5)
- A nuclear reactor is enclosed in a containment building made of …………… concrete. (10)
- Nuclear reactors contain thousands of these. (4, 4)
- A sievert and a millisievert are units of measurement for the dosage (amount) of …………… received by a person. (9)
- The presence of the radioactive element, Iodine-131, indicates that a partial …………… or worse has occurred. (8)
- Continual …………… of the core of a nuclear reactor is essential to prevent a major accident. (7)
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