Patent Number: 
Section: abstract

An electromagnetic coil assembly for a control rod driving mechanism, comprising coils and a yoke for embedding the coils, wherein damascene holes are disposed on the yoke, the coils are installed in the damascene holes, the yoke comprises first yokes and second yokes, and the damascene holes are disposed on the first yokes; the first yokes are connected with the second yokes, and a through hole for cooperating with a sealing shell assembly is disposed on the second yokes; and a thermal conductivity of the first yokes is stronger than a thermal conductivity of the second yokes. The method is the processing method of the assembly. The coil assembly provided in technical solution or the coil assembly obtained by the method can remarkably reduce the temperature inside the coil, thereby improving the reliability of the CRDM electromagnetic coil assembly and prolonging the service life of the CRDM electromagnetic coil assembly.