Intended for the Jules Horowitz experimental nuclear power plant in Cadarache, the polar bridge is located in the BUR (Reactor Building) above the nuclear reactor.
COMETE-J.PARIS designed and manufactured this polar bridge according to strong safety and quality requirements linked to the nuclear field (High level of safety - Level 1).
It is made up of 2 lifting systems with a capacity of 36 T for one and 6 T for the second. Its range is 34 m.
HIGH SECURITY BRIDGES
- 2 high security level 1 bridges : 45 and 25 tonnes.
- 1 level 2 high security bridge : 0.5 tonnes with an on-board telescopic basket for personnel.
In consortium with SPRETEC.
Design, supply and installation of a polar bridge with its track.
It is made up of a rotating structure (rotating quadrilateral) – made up of a double beam and box springs.
This structure moves on a circular rail placed on a raceway on consoles in the upper part of the BUR ; a radial structure (rolling quadrilateral) – made up of a double beam and two bed bases.
This structure circulates radially on the above "rotating quadrilateral" structure; a trolley carrying two winches – CMU 360 kN and 60 kN. This carriage moves transversely on the radial structure.
Means used :
- Precise analysis of all functions in order to offer equipment that meets performance safety requirements and SDF and SLI studies.
- Modeling of the entire RMP overhead crane in order to calculate and size the structure for earthquakes, followed by finite element verifications.
- Identification and monitoring of each in order to guarantee the total traceability of the work.
- Factory capacity : Presentation of the entire running beam (plus rail) in the workshop in order to obtain (after machining) and report a perfect geometric layout (accuracy to a few millimeters), General and functional presentation of the RMP bridge. Very advanced machining and geometric control in order to obtain the rotation function of the RMP bridge.
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