CONTROL DEVICE OF SPACER GRID OF NUCLEAR REACTOR FUEL ASSEMBLY Russian patent published in 2009 - IPC G21C21/00 G21C3/30 

FIELD: power engineering.

SUBSTANCE: invention refers to nuclear engineering and namely to manufacture of fuel assemblies for nuclear reactor, mainly water-cooled power reactor of "ВВЭР-1000" type. Control device of spacer grid of nuclear reactor fuel assembly includes weighs with constant magnet installed on support surface, and fixed platform for spacer grid to be installed in magnetic field. Magnet is composed of separate magnetic cells of the size corresponding to the size of spacer grid cell and located in a staggered manner relative to each other in accordance with various orientation of poles on the plate. The latter is made from magnetically soft steel and is of the size corresponding to spacer grid size.

EFFECT: improving accuracy of finding a cell from foreign material of spacer grid owing to magnetic field stabilisation.

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