Framatome Gmbh

Areva Np Gmbh

Mirco Fabris

Daniel Grypczynski

Stephane Guironnet

The invention concerns a method for repairing guide rails () of an assembly () radially maintaining a core supporting plate (), which consists in measuring the spacing between the spans of the lateral branches of the guide rail () to be repaired, cutting and removing at least one lateral branch of said guide rail () to be repaired, measuring the dimensions of said lateral branch and machining with identical dimensions at least one substitution lateral branch, mounting and fixing said substitution lateral branch and measuring the spacing between the spans of the lateral branches of the repaired guide rail.

Method for repairing guide rails of an assembly radially maintaining a support plate of a pressurized water nuclear reactor core

The device (15) for joining together a first plate (7) and a second plate (8)of the baffle assembly, which are located substantially at right angles, includes a screw (16) engaged in a housing consisting of an opening (18) passing through the first plate (7), and of a tapped blind opening (20) in the second plate (8). At least one opening (21) places an annular space (18b) around the shank (16b) of the screw in communication with the entry part (18a) of the opening (18) passing through the first plate (7), in order to deconfine the screw (16). The opening (21) may be a radial opening passing through a cup (17) against which the screw head (16a) comes to bear or an opening machined in the first plate (7) against a shoulder (18c) of the screw housing and the part (18b) of the opening for passing through the first plate (7) in which the shank (16b) of the screw (16) is engaged.

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Jouy le Moutier, France

Mirco Fabris