Physical Science (12th Edition), Standalone Book
12th Edition
ISBN: 9781260150544
Author: Bill W. Tillery
Publisher: McGraw Hill Education
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Chapter 13, Problem 39AC
To determine
From the following options, used fuel rods of a nuclear reactor contains approximately:
a.
b.
c.
d.
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In a breeder reactor, U-238 is made into the fissionable fuel
A.
U-239
B.
Pu-239
C.
U-235
D.
Th-239
E.
Th-238
a. To release 100 MW of power, approximately how many uranium fissions must occur every second? b. How many kilograms of U-235 would have to fission in 1yr to sustain a rate of 100 MW of power output?
Suppose a radioactive nucleus has a half-life of 2 min. and suppose the counting rate at time
t = 0 is 3000 counts/10 sec.
a. What is the counting rate after 2 min?
b. After 6 min?
c. After 10 min?
d. After 20 min?
Chapter 13 Solutions
Physical Science (12th Edition), Standalone Book
Ch. 13 - Prob. 1ACCh. 13 - Prob. 2ACCh. 13 - Prob. 3ACCh. 13 - Prob. 4ACCh. 13 - Prob. 5ACCh. 13 - Prob. 6ACCh. 13 - Prob. 7ACCh. 13 - Prob. 8ACCh. 13 - Prob. 9ACCh. 13 - Prob. 10AC
Ch. 13 - Prob. 11ACCh. 13 - Prob. 12ACCh. 13 - Prob. 13ACCh. 13 - Prob. 14ACCh. 13 - Prob. 15ACCh. 13 - Prob. 16ACCh. 13 - Prob. 17ACCh. 13 - Prob. 18ACCh. 13 - Prob. 19ACCh. 13 - Prob. 20ACCh. 13 - Prob. 21ACCh. 13 - Prob. 22ACCh. 13 - Prob. 23ACCh. 13 - Prob. 24ACCh. 13 - Prob. 25ACCh. 13 - Prob. 26ACCh. 13 - Prob. 27ACCh. 13 - Prob. 28ACCh. 13 - Prob. 29ACCh. 13 - Prob. 30ACCh. 13 - Prob. 31ACCh. 13 - Prob. 32ACCh. 13 - Prob. 33ACCh. 13 - Prob. 34ACCh. 13 - Prob. 35ACCh. 13 - Prob. 36ACCh. 13 - Prob. 37ACCh. 13 - Prob. 38ACCh. 13 - Prob. 39ACCh. 13 - Prob. 40ACCh. 13 - Prob. 41ACCh. 13 - Prob. 42ACCh. 13 - Prob. 43ACCh. 13 - Prob. 44ACCh. 13 - Prob. 45ACCh. 13 - Prob. 46ACCh. 13 - Prob. 1QFTCh. 13 - Prob. 2QFTCh. 13 - Prob. 3QFTCh. 13 - Prob. 4QFTCh. 13 -
5. What is a half-life? Give an example of the...Ch. 13 - Prob. 6QFTCh. 13 - Prob. 7QFTCh. 13 -
8. What is meant by background radiation? What is...Ch. 13 - Prob. 9QFTCh. 13 - What is a mass defect? How is it related to the...Ch. 13 - Prob. 11QFTCh. 13 - Prob. 1FFACh. 13 - Prob. 2FFACh. 13 -
3. Make up a feasible explanation for why some...Ch. 13 - Prob. 4FFACh. 13 - Prob. 5FFACh. 13 - Prob. 6FFACh. 13 - Prob. 7FFACh. 13 - Prob. 1IICh. 13 - Prob. 1PEACh. 13 - Prob. 2PEACh. 13 - Prob. 3PEACh. 13 - Prob. 4PEACh. 13 - Prob. 5PEACh. 13 - Prob. 6PEACh. 13 - Prob. 1PEBCh. 13 - Prob. 2PEBCh. 13 -
3. Predict if the nuclei in exercise 1 are...Ch. 13 - Prob. 4PEBCh. 13 - Prob. 5PEBCh. 13 -
6. If the half-life of cesium–137 is 30 years,...
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- Suppose a person swallows some radioactive material by accident. What information is needed to be able to assess possible damage?arrow_forwardQuestion 9 Why is a moderator required in a thermal nuclear reactor core? A To prevent overheating of the fuel rods. B To absorb surplus neutrons. C To shield the surrounding area from dangerous gamma radiation. To reduce the kinetic energy of thermal neutrons.arrow_forwardYou are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly 1/16 of the polonium remains. The corresponding half-life, T2 , of polonium is: a. 0.875 minutes. b. 1.14 minutes. c. 1.75 minutes. d. 3.50 minutes. e. 4.67 minutes.arrow_forward
- In nuclear reactor, the function of control rod is to:A. Control nuclear fission temperature.B. Absorb extra neutrons.C. Prevent leakage of radiation.D. Generate electricity from nuclear fission.E. Initial the nuclear fission.arrow_forwardA beta particle is A.a form of highly penetrating radiation . B.an electron emitted by a larger nucleus . C.the first particle emitted during radioactive decay . D.a helium nucleus emitted by a larger nucleus .arrow_forwardWhich of the following is not necessary to sustain fission reactions in a nuclear reactor? O a. Proton bombardment of fissile isotopes (e.g., U-235). O b. Release of neutrons by bombarded fissile isotopes. O c. Fission of fissile isotopes, producing highly radioactive fission products. O d. Transformation of U-238 to Tc-99 through absorption of neutrons.arrow_forward
- After a fission event, most of the energy released is in the form of A. Emitted beta particles and gamma rays.B. Kinetic energy of the emitted neutrons.C. Nuclear energy of the two fragments.D. Kinetic energy of the two fragments.arrow_forwarda. What is the final product of U-235? b. What are the 10 intermediate nuclides?arrow_forward10.A radioactive material, such as the isotope thorium-234, disintegrates at a rate proportional to the amount currently present. If Q(t) is the amount present at time t, then dQ/dt = −rQ, where r>0 is the decay rate. a.If 100 mg of thorium-234 decays to 82.04 mg in 1 week, determine the decay rate r. b.Find an expression for the amount of thorium-234 present at any time t. c.Find the time required for the thorium-234 to decay to one-half its original amount.arrow_forward
- Which of the following statements about nuclear fission is true? a. No new elements can be produced in a fission reaction. b. Energy released in fission reactions is generally less than that from fusion reactions. c. In a fission reaction, two light nuclei are combined into a heavier one. d. Fission reactions can be explained on the basis of the conservation of mass-energy.arrow_forwardWhich expression correctly describes the radioactive decay of a substance whose half-life is T? A. N(t) = No e-(t In 2)/T B. N(t) = No et/T O C. N(t) = No etT In 2 D. N(t) = No etTarrow_forward3. The following graph shows the amount of mg for a radioactive substance. a. Determine the initial quantity of the material. b. Determine the half-life for this substance. 200 180 160 140 120 100 80 60 40 20 c. Determine the percent decrease per hour. d. Determine how long it will take for only 25 mg of the substance to remain. 10 (12,50) 15 20 25 30 W 35 40arrow_forward
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