FUEL CHANNEL ASSEMBLY AND FUEL BUNDLE FOR A NUCLEAR REACTOR

摘要

A fuel assembly for a pressure-tube nuclear reactor includes a fuel channel assembly. The fuel channel assembly has an outer conduit and an inner conduit received within the outer conduit. The conduits define an annular fuel bundle chamber for receiving a flow of a coolant in one direction. The inner conduit includes a central flow passage for receiving a flow of the coolant in an opposite direction. A fuel bundle positioned within the fuel bundle chamber consists of fuel dements arranged to form an inner ring surrounding the inner conduit, and an outer ring surrounding the inner ring. The coolant may be light water, and geometries of the fuel assembly may be selected so moderation by the volume of coolant promotes generally uniform power distribution in the fuel elements.

主权项

1. A fuel assembly for a pressure-tube nuclear reactor, comprising:
a fuel channel assembly comprising an outer conduit, an inner conduit received within the outer conduit and defining an annular fuel bundle chamber therebetween for receiving a flow of a coolant in one direction, the inner conduit comprising a central flow passage for receiving a flow of the coolant in an opposite direction; and a fuel bundle positioned within the fuel bundle chamber, the fuel bundle comprising a plurality of fuel elements, and consisting of an inner ring of the fuel elements surrounding the inner conduit, and an outer ring of the fuel elements surrounding the inner ring.