Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 43.10, Problem 43.7QQ
To determine

Which of the following values for A is suitable for the fission reaction.

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A reactor is developing nuclear energy at a rate of 32000 kW. How many atoms of Uranium U235 undergo fission per second? How many kilogram of U 235 would be used up in 500 hours of operation? Assume the average energy of 200 MeV released per fission. Take Avogadro’s number 6x1023 and 1 MeV = 1.6x10-13 joule.
In the 2011 nuclear accident at Fukushima, Japan, an ENV earthquake-triggered tsunami wiped out emergency generators, leaving three reactors without a source of cooling water. Although safety systems shut down the reactors during the earthquake, ra- dioactive decay continued to generate thermal energy at the rate of some 33 MW. In a desperate attempt to cool the reactors, operators used fire engines to pump seawater into the reactors. If 650 m3 of 10°C seawater were injected into a reactor, how long would it take that 33 MW of thermal power to bring the water to the boiling point?
The Q-value of a reaction is the amount of energy released during the reaction. It is stated thatin step 1 of the PPI thermonuclear reaction chain,1H +1H → 2H + e+ + ν,1.44 MeV energy is released; then in step 2: 2H + 1H → 3He + γ and step 3,3He + 3He → 4He + 1H + 1H, 5.5 MeV and 12.8 MeV are released, respectively. Prove byappropriate calculation that the above quoted Q-values in MeV are true. The relevant masses:hydrogen 1.00782503214, helium-4 4.002603, positron 0.00054857991, deuterium 2.0141 andhelium-3 3.0160 are all quoted in the atomic units of mass which is 1.6605387 × 10−27 kg. Ignorethe neutrino contribution.
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