Abstract: A partitioning device is provided which can be used in a pressurized water nuclear reactor. It occupies the space between the prismatic shaped core of the reactor, and a cylindrical casing and comprises vertical partitioning plates surrounding the core and reinforcement elements placed between the partitioning plates and the casing. It comprises panels distributed into horizontal rows in vertical columns, all the panels of the same row being identical and having vertical partitioning plates welded together and fast with criss-crossed horizontal and vertical reinforcements bearing on the casing and with vertical tubes. The stacked tubes of a same column form a post resting on a core support plate. Solid vertical keys connect the panels in the different columns together and to the casing.

Abstract: A modular drying unit for a steam generator, having identical dryer elements arranged partly as a polygonal crown within the envelope of the generator and partly as a star within that crown. The dryers constitute in trios triangular cells the inner space of which is divided by a partition permitting isolation of the dryers with respect to one another, as well as guidance of the steam at the intake and outlet ends of the dryers. This type of unit is particularly suitable for generators with natural circulation, notably for a nuclear reactor.