Abstract: The invention relates to a heating rod for a pressurizer of a primary cooling system of a pressurized-water nuclear reactor, the rod comprising a metal outer shell (36) of longitudinally elongate shape having an external surface (62), and a heating element (40) mounted inside the shell (36). It comprises an anti-corrosion coating (60) covering at least part of the external surface (62) of the shell (36).

Abstract: A T-shaped pipe fitting element comprises a main tubular branch having first and second ends for connection to first and second pipe fitting sections of an auxiliary circuit, respectively, and a lateral branch having an axis which is at an angle to the axis of the main branch, and a free end for connecting to a third pipe fitting section of the auxiliary circuit. The first, second, and third pipe fitting sections each have different functions. One supplies the pipe fitting element with a first fluid at a high temperature, another supplies a second fluid to the pipe fitting element, at a lower temperature than the first fluid, and the third discharges a mixture of the first and second fluids. The pipe fitting sections consist of austenitic stainless steel. The T-shaped pipe fitting consists of stainless martensitic steel with improved thermal endurance properties.

Abstract: The invention relates to a heating rod for a pressurizer of a primary cooling system of a pressurized-water nuclear reactor, the rod comprising a metal outer shell (36) of longitudinally elongate shape having an external surface (62), and a heating element (40) mounted inside the shell (36). It comprises an anti-corrosion coating (60) covering at least part of the external surface (62) of the shell (36).

Abstract: The invention relates to a T-shaped pipefitting element (10) comprising a main tubular branch (10a) having a first end for the connection thereof to a first pipefitting section (7) and a second end for the connection thereof to a second pipefitting section (6), a lateral branch (10b) having an axis which is at an angle to the axis of the main branch (10a), and a free end for connecting to a third pipefitting section (8) of the auxiliary circuit (1). The first, second, and third pipefitting sections (6, 7, 8) of the auxiliary circuit each ensure a different function to the two other sections, that is either the supply of the pipefitting element (10) with a first fluid at a high temperature, the supply of a second fluid to the pipefitting element (10), at a lower temperature than that of the first fluid, or the discharge of a mixture of the first and second fluids. The pipefittings (6, 7, 8) of the auxiliary circuit of the pressurised water nuclear reactor consist of austenitic stainless steel.