Pressurized-water reactor installation

Claim 1

A pressurized-water reactor installation comprising a vertical reactor pressure vessel with an upper portion having at least one coolant connection with a horizontal dividing wall, said vessel internally having means for conducting coolant from below said wall downwardly into the vessel and then upwardly for discharge above the wall, a coolant pipe connected to and extending from the vessel's said connection and containing a horizontal partition wall extending throughout its length and connected with said dividing wall of the vessel's connection, a vertical steam generator positioned adjacent to said vessel, said generator having a lower portion having a coolant connection with which said pipe is connected and internally having a horizontal tube sheet above the generator's said connection and a horizontal partition below the tube sheet and horizontally aligned with and connected with the pipe's said horizontal partition wall and having a vertical partition wall extending upwardly to said tube sheet transversely with respect to the generator's said connection and forming horizontally separated spaces below the tube sheet and above the generator's horizontal partition, one of said spaces being adjacent to and connected to said pipe above its said horizontal partition wall, the generator's said horizontal partition forming a lower space therebelow, a vertical coolant pump vertically positioned in said lower space and discharging thereinto and having a suction inlet connected to the other of said spaces, said lower space being connected with said pipe below its said partition wall, and a vertical motor for driving said pump and positioned below and outside of the generator's said lower portion, a vertical shaft extending through said lower portion and interconnecting said motor and pump; wherein the improvement comprises said horizontal partition wall at least adjacent to said coolant connection being formed by at least two sections extending radially from the inside of said coolant pipe towards each other and having outer edges rigidly fixed to said inside and inner edges spaced from each other and interconnected by an expansion joint.