ABSTRACT

Nuclear energy does not inherently involve any use of fossil fuels or the production of carbon dioxide or other greenhouse gases (GHGs). Nuclear energy thus has the potential to make major contributions to the production of carbon-neutral fuels and energy carriers by providing a major source of the primary energy for these fuels. Forty percent of the U.S. primary energy consumption goes for the production of electricity, and that electricity provides 19% of the end-use energy consumption in the United States (LLNL 2008). The production of electricity accounts for 40% of the energy-related CO2 production in the United States, primarily from burning coal and natural gas. Nuclear power provides 21% of the U.S. electricity and virtually no CO2. Increased use of nuclear energy to produce electricity,

3.4.4 SNL SiC Bayonet Heat Exchanger ....................................................................... 237 3.4.5 Bayonet Experimental Results .............................................................................238 3.4.6 Bayonet Decomposer Improvements .................................................................. 241 3.4.7 Process Scale-Up .................................................................................................... 242 3.4.8 Materials Options for a Scaled-Up Process ........................................................ 243 3.4.9 Concluding Remarks ............................................................................................. 243

3.5 Sulphur-Iodine Cycle ......................................................................................................... 244 3.5.1 S-I Baseline Process Summary ............................................................................. 244

3.5.1.1 S-I Process Description ........................................................................... 245 3.5.1.2 Plant Performance and Ef‚ciency .........................................................255