Double-containment joints

Different materials may be used in the structure to take full advantage of their properties. For instance steel, which has a Young s modulus about twice that of cast iron, can be used for the panels to improve stiffness and/or reduce the weight of the structure. Both are desirable as they lead to increases in the natural frequencies of the structure. Another example is aluminium which, being easily extruded, can be used for double-containment joints. 

The feasibility of the technique having been established, it was applied to the fabrication of the base, column and overarm of a horizontal milling machine. - The drives, knee, spindle etc. were unchanged and hence the dimensions of the structural parts that interface with the unchanged parts were identical to those of a production model. Figure 1.13 shows the main features of the prototype. As this was to be manufactured on a one-off basis, all the double-containment joints and the V-ways were machined from solid. 

A new method for the fabrication of machine tools by epoxy resin bonding has been presented. It is based on building structures from frameworks of double-containment joints and linked by panels. This fabrication technique permits design optimisation as no part of a structure needs to be thicker than is necessary. In addition it offers... 

The connection is a concentrically loaded double lap joint containing two rows of fasteners of equal diameter. The composite plate is fastened to two steel plates. According to section 5.2.2.4 in the EUROCOMP Design Code, the first row of fasteners transfers a greater amount of load than the second row. The first and second fastener rows transfer 0.57Fxand 0.43Fx, respectively. 

Fig. 1.3. Double containment angle and T-joints offering joint symmetry (a, b)...

A sheet iron vessel, A, with riveted joints and a double bottom, has a grooved rim B into which fits a cover C. The cover has three tubular openings fitted with rubber stoppers—one D is an inlet for ammonia, another E is the outlet, and the third is for a thermometer F. The ammonia inlet-tube leads into a nickel dish O which contains clean dry sodium, and stands upon a little tripod to prevent direct contact with the hot bottom of the iron vessel A. 

A concept of an evolutionary reactor is pursued with the joint French / German European Pressurized Water Reactor , EPR, a 1525 MW(e) plant with evolutionary steam generating system and innovative double-walled containment [20]. A three years basic design phase as a prerequisite for the beginning of the licensing procedure was finished in 1997. The characteristic feature is a core catcher to restrict a possible core melt to the power plant itself. The joint effort by Germany ind France, however, finds in both countries a situation where no further base load is required. The EPR, confirmed as a future standard in France, is projected to substitute decommissioned nuclear plants. 

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