NASC 130 Essentials3_ch12

12 riches in rock energy mineral resources nuclear

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Unformatted text preview: a domed building Nuclear Reactors are loaded with uranium oxide fuel rods Reactors Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Nuclear Power A high-speed neutron initiates fission, creating… Nuclear fragments A large yield of energy More high-speed neutrons More Neutrons fuel a sustained nuclear chain reaction Control rods absorb Control neutrons, slowing fission Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Nuclear Power Fission produces enormous amounts of energy High-pressure steam is created in a closed reactor loop Heat is transferred to an external water loop Steam in the external loop is used to spin electrical turbines Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Nuclear Power Nuclear power is a major source of electricity Nuclear power emits zero greenhouse gases Nuclear power use likely to increase in the future Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Nuclear Power The geology of uranium The uranium Uranium – 235 (235U) is the most common nuclear fuel Uranium has two major isotopes U to 99.3% (not fissionable) 235 235U to 0.7% (fissionable) 238 238 U must be enriched two to three times to be fissionable 235 Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in...
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This document was uploaded on 11/25/2013.

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