Fission Definition and 311 Threads

Homework Statement WHen an atom of U235 undergoes fission in a statement reactor about 200MeV energy is liberated. suppose that a reactor using U235 has an output of 700MW and 20% efficient: a) how many atoms does it consume in one day? b) what mass of uranium does it consume daily...

Homework Statement For my essay on nuclear fission and fusion, I have to discuss some experimental evidence for nuclear fusion. I also need to find info about scientist that are responsible for developing the theory behind nuclear fusion. I am having trouble find info on these aspect. Any...

Homework Statement The fireball of a uranium fission bomb consists of a sphere of radius = 15m and temperature 300,000K shortly after detonation. Assuming that the expansion is adiabatic and that the fireball remains spherical, estimate the radius of the ball when the temperature is 3000K...

Homework Statement Example nuclear fission: {}_{92}^{235}U+{}_{0}^{1}n \rightarrow {}_{38}^{90}Sr+{}_{54}^{163}Xe+10{}_{0}^{1}n+Q How much energy does such fission release? Homework Equations I'm given the values of M({}^{235}U), m_{n}, M({}^{90}Sr), M({}^{136}Xe) but I've not...

since fusion is not commericially feasible, does hybrid fusion fission reactor change that? http://www.nature.com/nphys/journal/v5/n6/full/nphys1288.html With the increasingly urgent need to find solutions to the impending energy crisis, there is growing interest within the fusion...

Here's a new and interesting design for a nuclear reactor which I've never seen before: http://www.rbsp.info/rbs/RbS/PDF/aiaa05.pdf It's harvesting the kinetic energy of fission fragments via magnetic fields, converting it directly into electrical energy. They say that past obstacles over...

This is an idea I had and felt it worth publishing. The reason fusion is so difficult is because the particles are so light, small, and have difficulty overcoming the coulomb barrier. Well I got to thinking and noticed that it'd be a lot easier to get heavy nuclei to fuse, but naturally they'd...

There is an interesting book out - I believe the title is "COOL IT" - which points that much "green energy " talk is nonsense. For example, the production of concrete necessitates the release of CO2. When you figure in the amount of CO2 generated for the manufacture of the concrete used in...

Here's a question. Why does slow neutron is most likely to cause a nuclear fission in Uranium 235, compare to a fast neutron?

Looking at the fission of Uranium 235, the typical end product will be Barium 141 and Krypton 92, and 3 neutrons. From this, we can calculate the energy that the fission gives off, by taking the difference in mass of the product and "reactant", and use the equation of E=mc2. But what i see...

Homework Statement 235U92 + 1n0 --> 148La57 + 85Br35 + neutrons How many neutrons are released in this reaction? What is the importance of these neutrons in a nuclear reactor? Homework Equations The Attempt at a Solution I want to ask about the importance of these neutrons in a...

Does anyone know where to find fission products' fission yield data of APWR and PBMR?

i am new to nuclear science so acn anyone tell me , How does nuclear reaction start ? what the chemistry behind it . any inputs will be welcome

I have been searching online for any credible information about fusion or fission occurring and contributing significantly to the Earth internal temperature. Can anyone explain this to me further? So far I have heard several media sources discussing how fusion within the Earth is a...

1. What is the energy released in the fission reaction 10n + 23592U --> 14156Ba + 9236Kr + 310n? 2. I am pretty sure this has to do with binding energies, but other than that I'm completely lost. Please help. Thank you so much.

Can fission be coupled to fusion he-3 or H3 ? The goal is to reduce long-lived by products of uranium fission for a given amount of energy (heat) released. Could uranium fission, releasing neutrons, be coupled to some kind of "neutron" fusion reaction such as H3 (tritium) or He-3 or lithium...

Homework Statement How do you calculate the rate at which atoms of a fission product are being produced directly if you are only given the thermal neutron flux and the radionuclide's fission yield% ? Homework Equations The Attempt at a Solution I know the # of atoms of 235U but I...

why does fission chamber start to work from neutron fluxes more than source range in spite of being a kind of ionization chamber that is sensitive to gamma rays?

A fission reactor operates at 2700 MW level. Assume all this energy comes from the 200 MeV released by fission caused by thermal neutron absorption by 235U. At what daily rate is the mass of 235U used? (In practice, of course, the energy conversion is not 100% efficient, nor is all the 235U in a...

What I'm looking to understand is why fission and or fusion result in the release of energy. I understand that: By looking at the Binding Energy per Nucleon Curve, due to the strong force acting at very small length scales and falling off as 1/x^3 and the electro-magnetic repulsion of the...

Hi, can someonse explain me some things about fission? Supposedly, the Little Boy bomb consisted of a single bullet of uranium 235 that was to be shot at a bigger mass of uranium 235 to achieve critical mass, then an initiator would introduce a burst of neutrons so fission could occur. Two...

Is it possible to use fisssion to create plasmas, then use the plasma to generate electricity instead of suing steam to for elctricity? Just a thought.

Homework Statement Another possible form of the fission of U-235 is: \begin{array}{cc}235&92\[\tex] U + \begin{array}{cc}1&0\[\tex] n [tex]/rightarrow [tex]\begin{array}{cc}141&56\[\tex] Ba + [tex]\begin{array}{cc}92&36\[\tex] Kr + 3 [tex]\begin{array}{cc}1&0\ n a) Given the masses of the...

Energy Principle and Nuclear Fission Rhenium HELP! ASAP Homework Statement For some isotopes of some very heavy nuclei, including nuclei of thorium, uranium, and plutonium, the nucleus will fission (split apart) when it absorbs a slow-moving neutron. Thorium-227, with 90 protons and 137...

Where does most of the heat energy in fission reactions come from? -Does it come from radiation emitted from particles leaving the nucleus? -Does it come from those actual particles leaving the nucleus and hitting surrounding gases in the air, causing them to move and heat up? -Something...

I understand why Fusion releases energy.. The product is "lighter" than the reactions and the missing mass is converted into energy (like gamma radiation). This energy can also be called binding energy as it acts to stabilize the atom Now, why would FISSION RELEASE energy? Wouldn't energy...

I'm looking for the most common thermal fission products for U-233, U-235, Pu-239 and Pu-241. As far as I understand it there are two quantities of interest, the cumulative fission yield and the independent fission yield. The latter being "number of atoms of a specific nuclide produced...

A reactor is producing nuclear energy at the rate of 30000KW.How many atoms of U-235 undergo fission per second?How many kg of U-235 would be used up in 1000 hr of operation.Assume an energy of 200 Mev is released per fission.(Avogadro number=6*10^26 atom/kg)

Perhaps some semantics are involved here, Wikipedia and some others describe nuclear reactor material as going through a slow "fission" process. I have always thougt of it more as "natural decay". I visualize fission in a weapon, as the "breaking" of the atom, which creates new atoms and...

I've been really interested in fission lately and have been trying to find out as much about it as I can. A lot of explanations I've read explain that the nucleus spits apart from the force of a neutron hitting it. I've also read that sometimes a nucleus will decay by spontaneous fission if it...

How big is the step from a fission bomb to a fusion bomb?Do you simply put H next to some fission bombs?

I was doing some research on Technetium and I found out that it occurs naturally in uraninite from the spontaneous fission of U-238. But on the decay chain of U-238 I can't find Tc any where... So what's the difference between spontaneous fission and radioactive decay?

Homework Statement For some isotopes of some very heavy nuclei, including nuclei of thorium, uranium, and plutonium, the nucleus will fission (split apart) when it absorbs a slow-moving neutron. Uranium-235, with 92 protons and 143 neutrons, can fission when it absorbs a neutron and becomes...

Can anyone explain this to me? It piqued my interest, especially since I nominally work with radioactive materials (though admittedly, not fissile material) and didn't know where this came from. "It is not a coincidence, for example, that the three nuclei which are fissionable with slow...

Homework Statement a mass of 3.33x10^-28kg of uranium is converted into energy during nuclear fission (exploding) according to einstien's formula E=mc^2 where energy is measured in joules (J), m is measured in kg and c = 3000000000m/s is the speed of light Homework Equations show...

I have long wondered if you could combine fusion reactors with fission reactors. After all fusion produces large numbers of neutrons which can drive fission reactions. Then I saw this: http://www.physorg.com/news152284917.html So will this work? Is a combination of PWR and these things...

Which nuclear process is more economically feasible--fusion or fission? I think it's fusion because it produces more energy than it takes, as compared to fission. Am I right?

Gas core reactor rockets use nuclear gas reacting to super heat and therefore pressurize hydrogen. They operate at about 25000 C. Why not use a high intensity plasma arc which routinely operate at about 13,000 C but if designed to can go much higher by at least several fold. I got bored...

This is a stupid question, but it has always been a question of mine that I have never been able to find a strait answer. To be more specific, is quantum electrodynamics or special relativity used to model or predict fission reactions such as those found in a nuclear explosion or inside a...

Homework Statement How many kilograms of U-235 would be needed to run a 707 MW reactor for 1 year? Homework Equations 183.9 MeV released per reaction 7.57E26 reactions per year (These numbers are from the prior problems) The Attempt at a Solution I thought maybe half life, but...

My textbook said that only lower energy neutrons (around 1ev) favor Uranium fission while higher energy neutrons don't. Is there an explanation for this. ( i don't think we are required to know it for the course but I'm just interested...) Thanks.

If anyone can help me with this question I'd be greatly appreciative... Here's what I think I understand: Nuclear fission is the breaking of an atomic core of an atom. Like with U-235. It absorbs a slow moving neutron which yields the unstable U-236. Because of the instability the atomic...

The fission reaction n + 235U → 236U* → 141Ba + 92Kr + 3n produced 170 MeV of kinetic energy. A. How many of these fission events are needed to produce energy of 1 kilowatt- hour (kWh), that is, the energy it takes to run your blow dryer for an hour? B. How many neutrons are produced...

Fission is a process in which a nucleus splits into two parts that are roughly the same size of the original nucleus. In fusion, two nuclei fuse, or combine, to form one nucleus. These reactions seem to be opposite to each other and yet both release large amounts of energy. Explain why this is...

So I understand that when a nucleus is formed from its individual nucleons, that there will be a decrease in mass known as the mass defect. The mass defect can be equally converted to energy following E = mc^2 and this is the nuclear binding energy. Now, is this energy released into the...

Why more energy is released in fusion than fission?

The nuclear fission does not work! No infraction please! I was perhaps mistakenly under the impression that matter was destroyed in nuclear fission, but a careful look at this diagram (top right) appears to show all the protons, neutrons and electrons are balanced in the equation...

1. Homework Statement [/b] The overall question is: For this assignment explain how the E=mc2 equation applies to nuclear fission. In your answer illustrate your explanation with an example, being sure to distinguish between mass and mass number, and explain how a nuclear equation differs...

I am trying to come up with an example to illustrate how E=mc2 applies to nuclear fission. I need to be sure to distinguish between mass and mass number. I feel like I have some thing on the brink of my mind and then I loose it. I guess I need some help as I am tired and don’t know how much...

Dear All I am trying to do some Nuclear Fission based activity for my 12th grade students at school level. I shall be grateful if some one suggests such a low cast activity to perform at laboratory. Kind Regards Kosher.