Abstract: The invention relates to an underwater electricity generation module provided with a base. The electricity generation module is of the type that comprises an elongate cylindrical casing (12) incorporating an electricity generation unit (25a, 25b) comprising a nuclear boiler (28, 29) associated with electricity generation means (30, 31) connected to an external electricity distribution post (7) by means of electric cables (6). The lower portion of the casing (12) is provided with a base (14) that rests on the bed of the water body and anchoring means (15) for anchoring the module (1) to the bed. The invention is characterised in that the base (14) is essentially in the form of a sledge which extends from one end of the casing (12) to the other and the ends (50, 51) of which are curved in the form of a spatula at each end of the casing (12), said base including zones for absorbing variations in the length of the casing (12), linked to the variation in the pressure applied thereto when submerged or surfaced.

Abstract: The invention relates to an underwater electricity generation module provided with a base. The electricity generation module is of the type that comprises an elongate cylindrical casing (12) incorporating an electricity generation unit (25a, 25b) comprising a nuclear boiler (28, 29) associated with electricity generation means (30, 31) connected to an external electricity distribution post (7) by means of electric cables (6). The lower portion of the casing (12) is provided with a base (14) that rests on the bed of the water body and anchoring means (15) for anchoring the module (1) to the bed. The invention is characterised in that the base (14) is essentially in the form of a sledge which extends from one end of the casing (12) to the other and the ends (50, 51) of which are curved in the form of a spatula at each end of the casing (12), said base including zones for absorbing variations in the length of the casing (12), linked to the variation in the pressure applied thereto when submerged or surfaced.

Abstract: An underwater electricity generation module includes an elongate cylindrical casing (12) incorporating an electricity generation unit (25a, 25b) including a nuclear boiler (28, 29) associated with electricity generation elements (30, 31) connected to an external electricity distribution post by element of electric cables. The invention is characterised in that it includes two electricity generation units (25a, 25b) disposed symmetrically on each side of a central transverse plane of the casing (12) along the longitudinal axis thereof.

Abstract: Fuel assembly for the core of a nuclear reactor comprising spacing grids situated in the upper part of the assembly arranged at smaller intervals from one another than the grids situated in the lower part of the assembly. The upper grids ensure a more intense mixing of the coolant downstream than the lower grids, so as to reduce corrosion at the upper part and the temperature difference between the top of the sheath and the coolant.

Abstract: The nuclear fuel assembly comprises a bundle of fuel elements some of which contain a burnable neutronic poison, held in position at the nodes of a regular lattice by a skeleton having end pieces connected together by guide tubes occupying some of the nodes of the lattice. All the poison-containing elements are disposed so as to act on the reactivity of the adjacent assemblies in the heart of the reactor.