Neutron

Neutron economy

Neutron economy is defined as the ratio of an adjoint weighted average of the excess neutron production divided by an adjoint weighted average of the fission production. The distribution of neutron energies in a nuclear reactor differs from the fission neutron spectrum due to the slowing down of neutrons in elastic and inelastic collisions with fuel, coolant and construction material. Neutrons slow down in elastic and inelastic collisions, until they are absorbed via Neutron capture or lost by leakage. Neutron economy is the balanced account, in a reactor, of the neutrons created and the neutrons lost through absorption by non-fuel elements, resonance absorption by fuel, and leakage while fast and thermal energy ranges. Heavy water is an extremely efficient moderator. As a result, reactors using heavy water, such as the CANDU, also have a high neutron economy. The quantity that indicates how much the neutron economy is out of balance is given the term reactivity. If a reactor is exactly critical—that is, the neutron production is exactly equal to neutron destruction—the reactivity is zero. If the reactivity is positive, the reactor is supercritical. If the reactivity is negative, the reactor is subcritical. The term "neutron economy" is used not just for the instantaneous reactivity of a reactor, but also to describe the overall efficiency of a nuclear reactor design. (Wikipedia).

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What are neutron stars? (Astronomy)

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From playlist Astronomy

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Teach Astronomy - Properties of Neutron Stars

http://www.teachastronomy.com/ Neutron stars are truly remarkable objects. Think of something with the mass of the Sun, normally one and a half million kilometers across, compressed down to the size of a small asteroid, about twenty kilometers across. Conservation of angular momentum dic

From playlist 16. Stars 3

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What are Quarks?

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From playlist Science Unplugged: Particle Physics

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What Are Neutron Stars?

When a dying star is too massive to leave behind a white dwarf and not massive enough to leave behind a black hole, you get a neutron star (sometimes a pulsar). It's a very compact clump of neutrons surrounded by a very strong magnetic field. These things are crazy!! ______________________

From playlist Astronomy

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From playlist The Universe and Space stuff

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Astronomy - Ch. 22: Neutron Star (1 of 17) What is a Neutron Star?

Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will learn a neutron star is the remnant of the collapse of he core of a super massive star (greater than 8 times the of our Sun).

From playlist THE "WHAT IS" PLAYLIST

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Fission Reactor

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From playlist Physics

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Astronomy - Ch. 22: Neutron Star (7 of 17) What is the Upper Limit of a Neutron Star?

Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will learn the upper and lower limit of a neutron star are 1.0-2.5 times the mass of our Sun, and about 12 miles or 20 km in diame

From playlist THE "WHAT IS" PLAYLIST

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Fission is the new fire

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From playlist Energy and the Environment

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Wait... Gold Came From Ancient Asteroids?!

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From playlist Where Did Gold Come From And Where Can It Take Us?

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From playlist Lecture Collection | Energy Seminar

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From playlist Electricity generation and supply

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Teach Astronomy - Fission as an Energy Source

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From playlist 13. Particle Physics and the Sun

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The Quantum Internet

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From playlist Space Time!

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Q&A 103: How Many Stars Have Zero Planets? And More...

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From playlist Questions and Answers with Fraser Cain

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From playlist AQA Chemistry Paper 1 | Revision Playlist for Combined and Separate Science GCSE

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HOW IT WORKS: Nuclear Propulsion

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From playlist HOW IT WORKS

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Physics - Nuclear Physics (1 of 22) Mass of Proton, Neutron, and Electron

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From playlist MOST POPULAR VIDEOS

Related pages

Heavy water | Dollar (reactivity) | Nuclear fission | Nuclear reactor | Neutron | Neutron capture