NUCLEAR REACTOR COOLED BY A LIQUID METAL CONTAINED IN A VESSEL CLOSED BY UPPER CLOSURES

摘要

The invention relates to a nuclear reactor cooled by a liquid metal contained in a vessel obturated by upper closing means, said latter essentially being constituted by a slab and rotating plugs. The upper closing means comprise at least one circuit for circulation of a cooling gas or liquid, this circuit being provided with means for maintaining the closing means at a homogeneous temperature at least equal to 100 DEG C. and preferably close to 120 DEG C. The invention is applicable to the production of less cumbersome and less expensive fast neutron nuclear reactors.