Device for magnetic identifications of a component such as a nuclear fuelassembly in a nuclear reactor, nuclear fuel assembly provided with such a magnetic identification device and method for the magnetic identification of a component such as a fuel assembly in a nuclear reactor

摘要

A method and apparatus for providing a permanent identification of reactor fuel assemblies with an in-reactor remote readout capability. A bar code type code (50) assemblage is permanently coupled with the upper portion of the fuel assembly (46) which is comprised of alternating components of magnetic (86) and non-magnetic (88) metal such as stainless steel. An active sensor including a magnetic core, excitation winding, and sensor or pick-up winding (156) is employed to interact with the individual code components of the bar code assembly. The latter assembly may be formed as a sequence of rings through which the sensor is passed during a grappling procedure or as a sequence of vertically-oriented bar segments positioned outwardly of the fuel assembly and readable by rotating the fuel assembly before the active sensor.