neutron economy वाक्य
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- Beryllium also performs neutron doubling, improving the neutron economy.
- In either case, the reactor's neutron economy is based on thermal neutrons.
- Removal of Xe also improves neutron economy.
- Both breeding and burning depend on good neutron economy, and many designs can do either.
- As a result, reactors using heavy water, such as the CANDU also have a high neutron economy.
- The purpose of the neutron reflector is to improve neutron economy in the reactor, and hence to increase the maximum neutron flux.
- A'breeder'is simply a reactor designed for very high neutron economy with an associated conversion rate higher than 1.0.
- The quantity that indicates how much the neutron economy is out of balance is given the term "'Reactivity " '.
- It is a compact device extensively used worldwide for mapping of neutron flux, helping the reactor-operators in maintaining the neutron economy.
- Heavy water is very effective at slowing down ( moderating ) neutrons, giving CANDU reactors their important and defining characteristic of high " neutron economy ."
- These materials also have good neutron economy, allowing the pitch-to-diameter ratio to be large, which allows for improved natural circulation and economics.
- UF 4 is generally chosen over other salts because of the usefulness of the elements without isotope separation, better neutron economy and moderating efficiency, lower vapor pressure and better chemical stability.
- The resulting extremely high neutron economy, he claims, will make it possible to maintain a self-sustaining reaction in fuel rods of pure, once the reactor has been started by enriched fuel.
- 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.
- Most BWR and PWR commercial reactors use uranium enriched to about 4 % U-235, and some commercial reactors with a high neutron economy do not require the fuel to be enriched at all ( that is, they can use natural uranium ).
- An example of this process is the evolution of the Light Water Reactor, a very heavily moderated thermal design, into the Super Fast Reactor concept, using light water in an extremely low-density supercritical form to increase the neutron economy high enough to allow breeding.
- Although the thermal neutron fission cross section ( ? f ) of the resulting is comparable to and, it has a much lower capture cross section ( ? ? ) than the latter two fissile isotopes, providing fewer non-fissile neutron absorptions and improved neutron economy.
- Uranium-233 has been used as a fuel in several different reactor types, and is proposed as a fuel for several new designs fuel cycles which require the superior neutron economy of a fast reactor in order to breed plutonium, that is, to produce more fissile material than is consumed.
- See, e . g ., Einsteinium, which is formed by the capture of 15 neutrons by U-238 ( which is the sort of thing that you'll only find in a very high neutron economy, of course like the inside of a bomb, or a particle accelerator ) .-- talk ) 04 : 41, 3 November 2009 ( UTC)
- Use of the isotope 15 N ( which constitutes around 0.37 % of natural nitrogen ) is preferable because the predominant isotope, 14 N, has a not insignificant neutron absorption cross section which affects neutron economy and, in particular, it undergoes an ( n, p ) reaction which produces significant amounts of radioactive 14 C which would need to be carefully contained and sequestered during reprocessing or permanent storage.
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