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Chapter 43: Q11P (page 1331)
Calculate the disintegration energy Q for the fission of into two equal fragments. The masses you will need are
role="math" localid="1661753124790"
The disintegrated energy is .
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The neutron generation time (see Problem 19) in a particular reactor is . If the reactor is operating at a power level of , about how many free neutrons are present in the reactor at any moment?
In Fig. 43-10, the equation for n(K), the number density per unit energy for particles, n(K)iswhere nis the total particle number density. At the center of the Sun, the temperature isand the average proton energyis 1.94 keV. Find the ratio of the proton number density at 5.00keVto the number density at the average proton energy.
(a) How many atoms are contained in 1.0 kg of pure ? (b) How much energy, in joules, is released by the complete fashioning of 1.0 kg of ? Assume Q = 200 MeV . (c) For how long would this energy light 100 W a lamp?
The uncompressed radius of the fuel pellet of Sample Problem 43.05 is . Suppose that the compressed fuel pellet “burns” with an efficiency of 10%—that is, only 10% of the deuterons and 10% of the tritons participate in the fusion reaction of Eq. 43-15. (a) How much energy is released in each such micro explosion of a pellet? (b) To how much TNT is each such pellet equivalent? The heat of combustion of TNT is 4.6 MJ/kg . (c) If a fusion reactor is constructed on the basis of 100 micro explosions per second, what power would be generated? (Part of this power would be used to operate the lasers.)
A 200 MW fission reactor consumes half its fuel in 3.00 y . How much did it contain initially? Assume that all the energy generated arises from the fission of and that this nuclide is consumed only by the fission process.
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