DEVICE FOR REPAIRING NUCLEAR REACTOR FUEL ASSEMBLY

FIELD: nuclear power engineering; water-moderated and water-cooled reactors. ^ SUBSTANCE: proposed device designed for repairing faulty fuel assemblies where damaged and unsealed fuel elements are detected has gripping means for installing fuel element or displacer incorporating grip operating mechanism. The latter is made in the form of kinematically enclosed cable system whose cable is rigidly fixed with gripping means and sequentially engages upper fixed roller, upper movable roller, frictional hauling drum, intermediate roller, and lower fixed roller. Upper movable roller is secured on one end of rocker arm whose other end is joined with load; intermediate roller is disposed above frictional hauling drum and connected to force transducer. Such design of device makes it possible to reduce damage probability to unsealed fuel elements in the course of their extraction and installation, to reduce damage to cladding outer surfaces of new fuel elements or displacers, and to enhance nuclear fuel burnup. ^ EFFECT: reduced damage probability, enhanced yield of fuel assemblies upon replacement of unsealed fuel elements. ^ 4 cl, 1 dwg