CHM115_SCB_Lecture5_ - Lecture 5 More Nuclear Chemistry Reading was Section 23.4-23.6 Lecture 6 Sections 23.7-23.9 N uclear Reactions Gone Bad

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Lecture 5: More Nuclear Chemistry Reading was: Section 23.4-23.6 Lecture 6: Sections 23.7-23.9
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2 Three Mile Island, 1979 Nuclear Reactions Gone Bad
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3
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Chernobyl, Apr. 26 th 1986 Nuclear Reactions Gone Bad
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Why didn’t these reactors explode like an atomic bomb? Nuclear fuel: U-235 Weapon grade uranium: U-235 Different design and geometries Runaway Nuclear Reactions
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Yucca Mountain
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Yucca Mountain
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Yucca Mountain Waste container
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Yucca Mountain What’s intended to go in Yucca Mountain? The proposed Repository is planned to contain 77,000 tons of spent nuclear fuel from commercial nuclear reactors and high‑level radioactive waste from national defense activities. It could also contain the Three Mile Island reactor shell and rubble from the core. Why bury it?
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X is radioactive. How much of a sample of X is left after 3 half-lives? a. 1/2 b. 1/3 c. 1/4 d. 1/8 e. Impossible to tell without knowing the initial mass of X and its half life Question 1
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First order radioactive decay 6 h 6 h 6 h 6 h t ½ = 6 h
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Pu-239 half-life is 24,000 years. How much plutonium-239 remains in a sample that initially contained 1.0 kg of plutonium after 96,000 years? a. 1/2 kg b. 1/4 kg c. 1/8 kg d. 1/16 kg Question #2
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The Nuclear H alf-life Half-lives vary dramatically.
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This note was uploaded on 09/29/2010 for the course PHYS 17200 taught by Professor Gaboracsathy during the Spring '09 term at Purdue University-West Lafayette.

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CHM115_SCB_Lecture5_ - Lecture 5 More Nuclear Chemistry Reading was Section 23.4-23.6 Lecture 6 Sections 23.7-23.9 N uclear Reactions Gone Bad

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