scispace - formally typeset
Search or ask a question
Patent

Process for fabricating nuclear reactor fuel elements

26 Jun 1963-
About: The article was published on 1963-06-26. It has received 5 citations till now. The article focuses on the topics: Nuclear reactor core & Fuel element failure.
Citations
More filters
Patent
05 Jun 1995
TL;DR: In this article, a radioisotope production target and a method for fabricating a fissionable target were presented, where the target comprises an inner cylinder, a foil covering the inner surface of the inner cylinder and an outer hollow cylinder adapted to receive the substantially foil-covered inner cylinder.
Abstract: A radioisotope production target and a method for fabricating a radioisotope production target is provided, wherein the target comprises an inner cylinder, a foil of fissionable material circumferentially contacting the outer surface of the inner cylinder, and an outer hollow cylinder adapted to receive the substantially foil-covered inner cylinder and compress tightly against the foil to provide good mechanical contact therewith. The method for fabricating a primary target for the production of fission products comprises preparing a first substrate to receive a foil of fissionable material so as to allow for later removal of the foil from the first substrate, preparing a second substrate to receive the foil so as to allow for later removal of the foil from the second substrate; attaching the first substrate to the second substrate such that the foil is sandwiched between the first substrate and second substrate to prevent foil exposure to ambient atmosphere, and compressing the exposed surfaces of the first and second substrate to assure snug mechanical contact between the foil, the first substrate and the second substrate.

54 citations

Patent
21 Jun 1971
TL;DR: An improved nuclear fuel element which comprises an ordered array of spherical fuel particles dispersed in a flat plate was proposed in this paper, and the use of this fuel element to render improved heat transfer characteristics to nuclear reactor systems.
Abstract: An improved nuclear fuel element which comprises an ordered array of spherical fuel particles dispersed in a flat plate; and the use of this fuel element to render improved heat transfer characteristics to nuclear reactor systems.

21 citations

Patent
13 Jul 1978
TL;DR: In this paper, a fuel core consisting of ceramic fuel wafers is inserted in a lattice formed by a wire grid having low neutron absorption characteristics, the shape and dimensions of each mesh of the grid being intended to correspond to those of each wafer.
Abstract: The plate-type element is made up of a fuel core consisting of ceramic fuel wafers inserted in a lattice formed by a wire grid having low neutron-absorption characteristics, the shape and dimensions of each mesh of the grid being intended to correspond to those of each wafer. The grid is fitted in an outer frame and the fuel element is completed by top and bottom cladding plates.

6 citations

Patent
22 Dec 1989
TL;DR: In this paper, a gas-cooled nuclear fuel element having a particle fuel retention device which acts as a passive restraint in the event of failure of hot frit is presented, where the particle device is positioned either in the annular space within the inner frit, in the end cap through which coolant gas flows, or attached to the end-cap and extending axially beyond the fuel element.
Abstract: A gas cooled nuclear fuel element having a particle fuel retention device which acts as a passive restraint in the event of failure of hot frit. A particle fuel retention device is positioned either in the annular space within the inner frit, in the end cap through which coolant gas flows, or attached to the end cap and extending axially beyond the fuel element.

4 citations

Patent
16 Nov 1966
TL;DR: In this article, the authors describe a method for metallurgically bonding a complete leak-tight enclosure to a matrix-type fuel element penetrated longitudinally by a multiplicity of coolant channels.
Abstract: This disclosure describes a method for metallurgically bonding a complete leak-tight enclosure to a matrix-type fuel element penetrated longitudinally by a multiplicity of coolant channels. Coolant tubes containing solid filler pins are disposed in the coolant channels. A leak-tight metal enclosure is then formed about the entire assembly of fuel matrix, coolant tubes and pins. The completely enclosed and sealed assembly is exposed to a high temperature and pressure gas environment to effect a metallurgical bond between all contacting surfaces therein. The ends of the assembly are then machined away to expose the pin ends which are chemically leached from the coolant tubes to leave the coolant tubes with internal coolant passageways. The invention described herein was made in the course of, or under, a contract with the U.S. Atomic Energy Commission. It relates generally to fuel elements for neutronic reactors and more particularly to a method for providing a leak-tight metal enclosure for a high-performance matrix-type fuel element penetrated longitudinally by a multiplicity of coolant tubes. The planned utilization of nuclear energy in high-performance, compact-propulsion and mobile power-generation systems has necessitated the development of fuel elements capable of operating at high power densities. High power densities in turn require fuel elements having high thermal conductivities and good fuel retention capabilities at high temperatures. A metal clad fuel element containing a ceramic phase of fuel intimately mixed with and bonded to a continuous refractory metal matrix has been found to satisfy the above requirements. Metal coolant tubes penetrate the matrix to afford internal cooling to the fuel element while providing positive fuel retention and containment of fission products generated within the fuel matrix. Metal header plates are bonded to the coolant tubes at each end of the fuel element and a metal cladding or can completes the fuel-matrix enclosure by encompassing the sides of the fuel element between the header plates.

4 citations

References
More filters