| 摘要 |
<p>The setting-tight pieces (15) are introduced between the elements (4) at a temperature t0 which is essentially different from the operating temperature ts of the installation. The setting-tight pieces (15) comprise at least one part (22) made of form-memory alloy which has a first configuration at the temperature t0 and a second configuration at the temperature ts, so that the setting-tight pieces (15) have an initial transverse dimension which is smaller than the width of the spaces separating the elements (4) at the temperature t0, and a transverse dimension at the temperature ts which is substantially greater than the initial dimension. The setting-tight of the elements takes place automatically at the moment of bringing to the operating temperature of the installation. The invention applies in particular to anti-vibration bars arranged in the upper part or tube-bend region of a steam generator of a pressurised-water nuclear reactor. <IMAGE> </p> |
