Chapter 9 Multiple Choice Questions

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1) One tonne of uranium contains an equivalent amount of energy as…

200 tonnes of coal. correct incorrect

1000 tonnes of coal. correct incorrect

25000 tonnes of coal. correct incorrect

50000 tonnes of coal. correct incorrect

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2) The energy release in the fission of a ²³⁵U nucleus is about…

200 J. correct incorrect

20 MeV. correct incorrect

200 MeV. correct incorrect

200 eV. correct incorrect

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3) Which process that accompanies neutron-induced fission of uranium is particularly important in controlling a reactor?

Gamma decay correct incorrect

Beta-delayed neutron emission correct incorrect

Neutrino emission correct incorrect

Neutron emission correct incorrect

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4) In a pressurized water reactor, water acts both as a coolant and as a _____ .

Your response

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5) Match the following symbols to the terms in the four-factors formula for the multiplication constant k_∞.

5a.

Fast fission factor

Select an answer choice p ε η f

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5b.

Resonance escape probability

Select an answer choice f η p ε

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5c.

Thermal utilization factor

Select an answer choice p ε η f

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5d.

Number of neutrons produced per thermal neutron absorbed

Select an answer choice η f ε p

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6) The amount of fissile material produced from fertile nuclei divided by the amount consumed is called the _____ _____.

Your response

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7) The increase in the output of a PWR through conversion is about…

5–10%. correct incorrect

10–25%. correct incorrect

30–60%. correct incorrect

80–120%. correct incorrect

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8) For breeding to be practical in a reactor, η must be greater than

1.2 correct incorrect

2 correct incorrect

2.2 correct incorrect

2.6 correct incorrect

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9) Following a contained reactor accident, the radiation dose rate is 40 μSv h^-1 at 500 m from the reactor. What is the dose rate at 2 km?

1 μSv h^-1 correct incorrect

2.5 μSv h^-1 correct incorrect

10 μSv h^-1 correct incorrect

20 μSv h^-1 correct incorrect

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10) A control system for the cooling of a reactor core that depends on gravity or temperature differences, rather than on pumps, is an example of a ______ safety system.

Your response

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11) Which countries are proposing to expand their nuclear power capability? Please select all that apply.

India correct incorrect

Germany correct incorrect

China correct incorrect

Russia correct incorrect

Italy correct incorrect

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12) What is the accessible potential contribution of nuclear power to the global energy supply by 2050?

~ 2000 TWh per year correct incorrect

~ 3000 TWh per year correct incorrect

~ 5000 TWh per year correct incorrect

~ 10000 TWh per year correct incorrect

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13) Which of the following statements about nuclear power are true?
Please select all that apply.

It has low associated carbon emissions. correct incorrect

In free market economies, finding finance for plants is easy. correct incorrect

Solutions to nuclear waste disposal have not been proposed. correct incorrect

Nuclear power provides about 10% of the world's electricity supply. correct incorrect

Construction and financing of small modular reactors may be easier than for 1.5 GW reactors. correct incorrect

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14) Which of the following reactions is most likely to be used in the first commercial fusion reaction?

H + H correct incorrect

D + D correct incorrect

D + T correct incorrect

n + T correct incorrect

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15) A temperature of 10⁸ °C, required for fusion to occur at a sufficient rate in a tokamak, corresponds to particle energies of…

1 keV. correct incorrect

10 keV. correct incorrect

100 keV. correct incorrect

1 MeV. correct incorrect

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16) In which of the following ways can plasmas be contained on Earth?
Please select all that apply.

By magnetic fields correct incorrect

By inertia correct incorrect

By advanced composite materials correct incorrect

By electrostatic fields correct incorrect

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17) Which of the following are sources of tritium?
Please select all that apply.

The oceans correct incorrect

Natural gas correct incorrect

Lithium correct incorrect

Beryllium correct incorrect

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18) Which of the following statements about a tokamak fusion reactor are correct?
Please select all that apply.

The containment time is affected by turbulence correct incorrect

The induced radioactivity in the containment wall is a significant hazard. correct incorrect

Neutrons deposit most of their energy within the containment wall. correct incorrect

Making a tokamak a divertor tokamak and providing sufficient plasma heating can give about twice the containment time. correct incorrect

Increasing the size of a tokamak is expected to increase the containment time. correct incorrect

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19) 200 kg of deuterium and 300 kg of tritium would produce about…

0.5 GWy of electricity. correct incorrect

1 GWy of electricity. correct incorrect

2 GWy of electricity. correct incorrect

5 GWy of electricity. correct incorrect

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20) Resources on land are sufficient to provide the world through controlled fusion…

3 TWy annually for 100 years. correct incorrect

3 TWy annually for 300 years. correct incorrect

3 TWy annually for 1000 years. correct incorrect

3 TWy annually for 5000 years. correct incorrect