INTERNAL INSTRUMENTATION SYSTEM OF AN ADVANCED ELECTRONIC CARD NUCLEAR REACTOR AND CORRESPONDING METHOD OF MODIFYING AN INTERNAL INSTRUMENTATION SYSTEM OF A NUCLEAR REACTOR

摘要

This system (3) of internal instrumentation of a nuclear reactor comprises at least: - a probe (7) for measuring the neutron flux in the core (5) of the nuclear reactor, - a cable (9) for moving the probe inside the core (5), - a rotational device (35) for driving the displacement cable (9), and- a device (44) for determining the angular position of the rotary drive device (35) , which determination device comprises a synchro-transmitter (45) itself comprising a rotor integral in rotation with the drive device (35) and a stator comprising three coils, the device for determining the angular position (44) comprises an electronic assembly digitizing at least two of the voltages across the windings of the stator of the synchro-transmitter and digitally processing said digitized voltages to produce at least one output signal representative of the angular position of the rotary drive device ment (35).