A traveling wave nuclear fission reactor, fuel assembly, and method of controlling burnup therein

A reactor and burnup technology, which is applied in the fields of reactor fuel elements, fast fission reactors, and control of nuclear reactions, and can solve the problems of undisclosed traveling wave nuclear fission reactors, fuel assemblies, etc.

Inactive Publication Date: 2012-05-16
泰拉能源有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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However, this patent does not appear to disclose a traveling wave nuclear fission reactor, fuel assembly, and method of controlling burnup therein as described and claimed herein
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  • A traveling wave nuclear fission reactor, fuel assembly, and method of controlling burnup therein
  • A traveling wave nuclear fission reactor, fuel assembly, and method of controlling burnup therein
  • A traveling wave nuclear fission reactor, fuel assembly, and method of controlling burnup therein

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[0048] In the following detailed description, reference is made to the accompanying drawings which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The exemplary embodiments described in the detailed description, drawings and claims are not meant to limit the scope of the invention. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here.

[0049] Additionally, this application uses pro forma general headings for clarity of presentation. However, it should be understood that these general headings are used for purposes of illustration and that different types of subject matter may be discussed throughout the application (for example, describing equipment / structure may be discussed under process / operation headings and / or may be discussed under structure / process headings Discussion process / operation; a...

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Abstract

A traveling wave nuclear fission reactor, fuel assembly, and a method of controlling burnup therein. In a traveling wave nuclear fission reactor, a nuclear fission reactor fuel assembly comprises a plurality of nuclear fission fuel rods that are exposed to a deflagration wave burnfront that, in turn, travels through the fuel rods. The excess reactivity is controlled by a plurality of movable neutron absorber structures that are selectively inserted into and withdrawn from the fuel assembly in order to control the excess reactivity and thus the location, speed and shape of the burnfront. Controlling location, speed and shape of the burnfront manages neutron fluence seen by fuel assembly structural materials in order to reduce risk of temperature and irradiation damage to the structural materials.

Description

technical field [0001] The present application relates generally to the control of nuclear reactions, and more particularly to traveling wave nuclear fission reactors, fuel assemblies and methods of controlling burnup therein. Background technique [0002] It is well known that in an operating nuclear fission reactor, neutrons of known energy are absorbed by nuclides with large atomic masses. The resulting composite nucleus breaks down into fission products comprising two smaller atomic mass fission fragments and decay products. Nuclides known to undergo such fission by neutrons of all energies include uranium-233, uranium-235, and plutonium-239, all of which are fissile nuclides. For example, thermal neutrons with a kinetic energy of 0.0253 eV (electron volts) can be used to fission U-235 nuclei. Thorium-232 and uranium-238, which are fertile nuclides, will not undergo induced fission unless fast neutrons with kinetic energies of at least 1 MeV (megaelectron volts) are ut...

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Application Information

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IPC IPC(8): G21C7/06
CPCG21C7/02Y02E30/34G21C7/34G21C1/024G21C7/06G21C1/026G21C3/07Y02E30/39G21C19/50G21C1/022G21C7/08G21C5/20Y02E30/40Y02E30/30G21C7/10
Inventor C.E.阿尔菲尔德J.R.吉尔兰德R.A.海德M.Y.艾什卡瓦D.G.麦卡利斯N.P.迈尔沃尔德C.惠特默小洛厄尔.L.伍德G.B.齐默尔曼
Owner 泰拉能源有限责任公司
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