SELF-LOCKING NUT FOR COUPLING BARS OF FUEL ASSEMBLIES.

摘要

SELF-LOCKING NUT FOR COUPLING BARS OF FUEL ASSEMBLIES. METHOD AND APPARATUS FOR BLOCKING COUPLING BARS, PREVENTING THEY FROM ROTATING WITH RESPECT TO THE UPPER OR LOWER PLATE. A CONVENTIONAL NUT IS USED, TO THREAD IT IN THE UPPER THREADED EXTENSION OF THE BARS, BRINGING FITTINGS EXTENDED TO THE OUTSIDE, INTERFERING, WHEN THEY ROTATE, WITH A FUEL BEAM CHANNEL INSTALLED, WHERE THE NUT WITH FINGERS IS MADE IN GUNS. PLATE WITH BARS. FOR THIS, THE NUTS WITH FINS ARE TURNED AT AN ANGLE THAT DOES NOT CREATE INTERFERENCE WITH THE CHANNEL. THEN THE CHANNEL INTERFERES WITH THE NUT FINS ROTATION PATH, PREVENTING RELATIVE ROTATION BETWEEN COUPLING BAR AND NUT WITH FINS. SO, WHEN DISMANTLING THE BEAM, ONLY THE BEAM SHOULD BE REMOVED AND THE NUT WITH NUTTED FINS IS TURNED CONVENTIONALLY TO EXCEED THE LOCKING OF THE NUT, FACILITATING THE DISASSEMBLY OF A COMBUSTIBLE BEAM ASSEMBLY.