PROCEDURE AND DEVICE FOR INTERVENTION ON THE CORE STRUCTURE OF A NATURAL URANIUM NUCLEAR REACTOR, PROCESS FOR ASSEMBLING THE DEVICE AND USE OF THE PROCESS FOR DISMANTLING THE CORE STRUCTURE OF THE NUCLEAR REACTOR

摘要

Procedure for overhead intervention in the structure of the core (2) of a natural uranium, graphite-modulated, gas-cooled nuclear reactor enclosed in a concrete housing (1) with a top partition (4) traversed by guide tubes involves installing a movable beam (14) with a horizontal rotating arm (21) in the space (8) between the top of the core and the underside of the upper partition, with a carriage (22) with a lifting gear (22') that moves along the arm. An Independent claim is included for an apparatus for use in the above method, which is attached to the carriage lifting gear and, like the carriage, arm and beam, is remote-controlled.