Light water nuclear reactor fuel pencil`s lower end fitting, has noses delimitating water passages with channels, where passages has sections which are radially moved with respect to nodes corresponding to network for forming baffle

摘要

#CMT# #/CMT# The end fitting has a lower plate (43) forming a debris control device for delimitating water flow channels (47) arranged in nodes of a regular network, and orientation noses (39) arranged in part in the channel for delimitating water passages (51) with the channels. The water passages comprise two sections (S1, S2), which are radially moved each other with respect to the nodes corresponding to the regular network for forming a baffle (56). #CMT#USE : #/CMT# Lower end fitting for a fuel pencil (claimed) of a light water nuclear reactor. Can also be used for a boiling water reactor (BWR) and a pressurized water reactor (PWR). #CMT#ADVANTAGE : #/CMT# The lower plate provides improved debris stopping capacity, improves the orientation of the flow lines of the water to reduce the vibrations and damaging risks by fretting the pencils and reduces the lateral speed of the flow, thus reducing the load losses. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a partial schematic side view illustrating a structure of a lower end fitting for a fuel pencil of a light water nuclear reactor. S1, S2 : Sections 39 : Orientation noses 43 : Lower plate 47 : Water flow channels 51 : Water passages 56 : Baffle.