摘要:
The invention relates to light water reactor designs in which thorium is used as fuel and in particular to designs of jacketless fuel assemblies, which make up the cores of pressurized water reactors (PWRs) such as the VVER-1000. A fuel element is provided for use in a fuel assembly of a nuclear reactor, the fuel element comprising a kernel comprising fissionable material, wherein the fuel element has a multi-lobed profile that forms spiral ribs.
摘要:
The invention relates to light water reactor designs in which thorium is used as fuel and in particular to designs of jacketless fuel assemblies, which make up the cores of pressurized water reactors (PWRs) such as the VVER-1000. A fuel element is provided for use in a fuel assembly of a nuclear reactor, the fuel element comprising a kernel comprising fissionable material, wherein the fuel element has a multi-lobed profile that forms spiral ribs.
摘要:
The invention relates to light water reactor designs in which thorium is used as fuel and in particular to designs of jacketless fuel assemblies, which make up the cores of pressurized water reactors (PWRs) such as the VVER-1000. A fuel element is provided for use in a fuel assembly of a nuclear reactor, the fuel element comprising a kernel comprising fissionable material, wherein the fuel element has a multi-lobed profile that forms spiral ribs.
摘要:
Nuclear fuel assemblies include fuel elements that are sintered or cast into billets and co-extruded into a spiral, multi-lobed shape. The fuel kernel may be a metal alloy of metal fuel material and a metal-non-fuel material, or ceramic fuel in a metal non-fuel matrix. The fuel elements may use more highly enriched fissile material while maintaining safe operating temperatures. Such fuel elements according to one or more embodiments may provide more power at a safer, lower temperature than possible with conventional uranium oxide fuel rods. The fuel assembly may also include a plurality of conventional UO2 fuel rods, which may help the fuel assembly to conform to the space requirements of conventional nuclear reactors.
摘要:
The present invention provides a fuel element for use in a fuel assembly of a nuclear reactor and a method of manufacturing such a fuel element. The fuel element comprises a kernel that includes enriched uranium or plutonium; and a cladding enclosing the kernel, wherein the fuel element has a four-lobed profile that forms spiral ribs, and the spiral ribs have a pitch of axial twist of between 5% and 30% of a length of the fuel element.