Fast fission is fission that occurs when a heavy atom absorbs a high-energy neutron, called a fast neutron, and splits. Most fissionable materials need...
3 KB (421 words) - 01:52, 19 April 2024
A fast-neutron reactor (FNR) or fast-spectrum reactor or simply a fast reactor is a category of nuclear reactor in which the fission chain reaction is...
56 KB (7,515 words) - 13:21, 14 June 2024
Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons...
73 KB (9,616 words) - 07:51, 20 July 2024
Breeder reactor (redirect from Breeder nuclear fission)
breeding to fission. On the other hand, a fast reactor needs no moderator to slow down the neutrons at all, taking advantage of the fast neutrons producing...
80 KB (8,213 words) - 00:43, 23 July 2024
Nuclear chain reaction (redirect from Self-sustaining nuclear fission)
feedback loop" of these reactions. The specific nuclear reaction may be the fission of heavy isotopes (e.g., uranium-235, 235U). A nuclear chain reaction releases...
34 KB (4,696 words) - 10:18, 25 July 2024
high-energy fast neutrons from a fusion reactor to trigger fission in non-fissile fuels like U-238 or Th-232. Each neutron can trigger several fission events...
34 KB (4,638 words) - 15:58, 1 July 2024
that uses thermonuclear fusion on a large scale to create fast neutrons that can cause fission in depleted uranium, but which is not a two-stage hydrogen...
13 KB (1,779 words) - 19:52, 20 July 2024
Neutron temperature (redirect from Fast neutron)
meaning that fewer than half of fission neutrons qualify as "fast" even by the 1 MeV criterion. Spontaneous fission is a mode of radioactive decay for...
14 KB (1,552 words) - 23:28, 19 February 2024
Four factor formula (redirect from Fast fission factor)
{\displaystyle \nu _{t}} are the average number of neutrons produced per fission in the medium (2.43 for uranium-235). σ f F {\displaystyle \sigma _{f}^{F}}...
4 KB (485 words) - 04:02, 14 April 2024
Nuclear reactor (redirect from Fission reactor)
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions. Nuclear reactors are used at...
93 KB (10,905 words) - 08:58, 14 July 2024
fission driven by fast thermonuclear neutrons. Such bombs are classified as two stage weapons and most current Teller–Ulam designs are such fission-fusion-fission...
105 KB (12,388 words) - 12:33, 25 July 2024
Nuclear weapon design (redirect from Pure fission)
weapon to detonate. There are three existing basic design types: pure fission weapons are the simplest, least technically demanding, were the first nuclear...
123 KB (16,143 words) - 23:47, 20 July 2024
when a reactor runs on fast neutrons, the plutonium isotopes are far more likely to fission upon absorbing a neutron. Thus, fast neutrons have a smaller...
17 KB (1,943 words) - 00:10, 29 June 2024
Neutron poison (redirect from Fission poisoning)
neutrons and fast neutrons. In the RBEC-M Lead-Bismuth Cooled Fast Reactor, the fission products with neutron capture more than 5% of total fission products...
18 KB (2,277 words) - 12:36, 16 July 2024
because inelastic scattering reduces neutron energy below the range where fast fission of one or more next-generation nuclei is probable. Doppler broadening...
22 KB (2,809 words) - 09:10, 6 June 2024
Long-lived fission products (LLFPs) are radioactive materials with a long half-life (more than 200,000 years) produced by nuclear fission of uranium and...
13 KB (2,061 words) - 03:20, 28 June 2024
Neutron bomb (category Articles with FAST identifiers)
that will fast fission when it captures a fast, fusion-generated neutron, and thus on fissioning will produce fission neutrons and fission products embedded...
63 KB (6,667 words) - 14:27, 2 July 2024
Fissile material (category Nuclear fission)
000 km/s), the fission threshold to cause subsequent fission of 238 U , so fission of 238 U does not sustain a nuclear chain reaction. Fast fission of 238 U...
12 KB (1,753 words) - 10:51, 23 June 2024
A natural nuclear fission reactor is a uranium deposit where self-sustaining nuclear chain reactions occur. The conditions under which a natural nuclear...
21 KB (2,629 words) - 16:27, 23 July 2024
amplifies the fusion reaction by fissioning uranium atoms with fast neutrons from the fusion reaction). This eliminated fast fission by the fusion-stage neutrons...
62 KB (7,233 words) - 00:00, 21 June 2024
discusses each of the main elements in the mixture of fission products produced by nuclear fission of the common nuclear fuels uranium and plutonium. The...
34 KB (4,505 words) - 23:54, 9 July 2024
Nuclear fission products are the atomic fragments left after a large atomic nucleus undergoes nuclear fission. Typically, a large nucleus like that of...
42 KB (5,142 words) - 10:07, 17 March 2024
energy released, and the amount of fission yield was also strictly controlled. Fission, primarily "fast" fission of the natural uranium tamper surrounding...
20 KB (1,003 words) - 22:35, 20 May 2024
neutrons almost always fission 235U or 239Pu into unequal halves. Fast fission in a fast reactor or nuclear weapon, or fission of some heavy minor actinides...
25 KB (1,018 words) - 07:51, 2 July 2024
into two smaller atoms (fission products). The fission process for 235U nuclei yields two fission products, two to three fast-moving free neutrons, plus...
30 KB (3,767 words) - 11:56, 19 June 2024
Nuclear fission splits a heavy nucleus such as uranium or plutonium into two lighter nuclei, which are called fission products. Yield refers to the fraction...
41 KB (1,175 words) - 12:37, 14 April 2024
{\displaystyle \nu _{t}} are the average number of neutrons produced per fission in the medium (2.43 for uranium-235). σ f F {\displaystyle \sigma _{f}^{F}}...
5 KB (508 words) - 03:30, 26 November 2021
absorptions result in fission and 1 of 6 result in neutron capture forming uranium-236. The fission-to-capture ratio improves for faster neutrons. Uranium-236...
34 KB (3,124 words) - 13:36, 4 July 2024
Pressurized water reactors, like all thermal reactor designs, require the fast fission neutrons to be slowed (a process called moderation or thermalizing) in...
33 KB (4,296 words) - 20:58, 11 June 2024
require fast reactors to sustain breeding, because only with fast moving neutrons does the fission process provide more than 2 neutrons per fission. With...
116 KB (14,407 words) - 00:57, 23 July 2024