Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.

Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.
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ANSWER: Y -- NEUTRONS MODERATED TO RELATIVELY LOW ENERGIES.
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In a breeder reactor, new fuel is formed as non-fuel uranium-238 absorbs a neutron and ultimately becomes which of the following fissionable atoms: w) uranium-235 x) plutonium-239 y) uranium-239 z) neptunium-239

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Last Answer : ANSWER: X -- PLUTONIUM-239

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Last Answer : (A) Protect the walls of the reactor from radiation damage

A fast reactor uses: w) an extremely short time to get to the maximum operating reactivity. x) uranium-235 as fuel. y) heavy water as a coolant. z) essentially unmoderated neutrons.

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Last Answer : ANSWER: Z -- ESSENTIALLY UNMODERATED NEUTRONS.

Which of the following is NEVER used as a coolant in nuclear reactors: w) liquid nitrogen x) liquid sodium y) water z) helium gas

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