HW#1-ENU4930 - 235 U. How many units are required to enrich...

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ENU 4930/6937 Elements of Nuclear Non-Proliferation and Safeguards HW #1 Due Date: May 19, 2010 1. Calculate the energy released in the following reaction (note: you can look up atomic masses at http://atom.kaeri.re.kr ) Q n 4 Cs Rb U n 1 0 140 55 92 37 235 92 1 0 + + + + 2. Find the multiplication factors k and k eff for a thermal reactor with ε = 1.05, p = 0.75, L f = 0.90, L t = 0.98, f = 0.85, and η = 1.75. 3. You are using gaseous diffusion to enrich uranium. Given that your tail assay for each stage contains 0.20% wt 235 U, determine the number of gaseous diffusion units (stages) required to enrich uranium to 4% wt
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Unformatted text preview: 235 U. How many units are required to enrich to 90% wt 235 U? 4. Go the Nuclear Regulatory Commission website ( www.nrc.gov ). Summarize (in your own words) the different categories of special nuclear materials. 5. What is the decay chain for U-232? You can draw it, or list the isotopes in the decay chain (starting with Th-228) along with the mode(s) of decay and half-lives. If we start with 100 MBq of U-232, how much activity of the third isotope in the decay chain is produced after 15 years (consider U-232 as the first isotope in the chain)?...
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This note was uploaded on 07/28/2011 for the course ENU 4930 taught by Professor Staff during the Summer '08 term at University of Florida.

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