FISSION PRODUCT EMISSION DEVICE FOR DETECTING DESTROIED FUEL ELEMENT IN A NUCLEAR REACTOR

摘要

A device for standardising the emission products for the detection of rupture of the wrappers of fuel elements of a nuclear reactor of the type cooled by water under press. comprises a pipe inserted into the vessel of the reactor and de fining a first and second chamber sepd. by a constriction. The second chamber is at the end of the pipe and contains a deposit of redioactive material on its wall. It communicates with the reactor vessel by a nozzle creating a press. drop greater than that created by the constriction. A tube in the pipe opening at the end of the first chamber remote from the second chamber is connected to a source of water under a press. greater than that of the cooling water of the reactor.