Bottom end-piece having an anti-debris device with a baffle for a nuclear assembly and corresponding assembly

摘要

This bottom end-piece includes nozzles for directing the flow of water of the reactor along the lower ends of the fuel rods, the nozzles being arranged at nodes of the substantially regular network of the fuel rods, and an anti-debris device which delimits water flow channels. At least some of the water flow channels are arranged at nodes of the substantially regular network. Direction nozzles are arranged at least partially in the channels in order to delimit water passages therewith, and at least one water passage includes a first section and a second section which are mutually offset radially relative to the corresponding node of the network in order to form a baffle.

主权项

1. A bottom end-piece of a support skeleton for a fuel assembly of a light water nuclear reactor, the bottom end-piece comprising:
direction nozzles directing the flow of water of the reactor along the lower longitudinal ends of fuel rods supported by the skeleton, the direction nozzles being arranged at nodes of a substantially regular network of the skeleton so as to be placed in a longitudinal continuation of at least some of the fuel rods and/or at least some connection elements extending between the bottom end-piece and a top end-piece of the support skeleton, and an anti-debris device delimiting water flow channels, at least some of the water flow channels being arranged at the nodes of the substantially regular network and each including one of the direction nozzles arranged at least partially in a corresponding one of the water flow channels, the direction nozzles arranged at least partially in the water flow channels and the anti-debris device delimiting water passages therebetween, the anti-debris device and a corresponding one of the direction nozzles at at least one of the water passages delimiting a first section and a second section which are mutually offset radially relative to a central axis of the corresponding direction nozzle and form a baffle, wherein the at least one water passage is delimited such that water passing longitudinally through the water passage cannot pass rectilinearly.