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The objectives assigned to this study are aimed at facilitating the possible writing of practical rules designed to take account of buckling effects in the presence of imposed strain, such as thermal stresses. It is first necessary to define the problems of the LMFBR reactor manufacturer as clearly as possible. The degree of risk of this failure mode is related to the specificities of construction and operation of this type of reactor, built of large thin shell structures and withstanding low pressures but high thermal stresses. The construction codes normally consulted by the builders are then examined. These codes offer little operational data to take account of this behaviour. In the third phase, an illustration of the problems encountered in developing rules designed to account for buckling under strain is provided in the light of a review of previous works. This is followed by a precise description of the latest analytical methods, many of them still under development, by arbitrarily considering their classification in three categories, in line with their implementation principles: experimental, theoretical and numerical. The final conclusions are intended to express an opinion on the conditions of application of the methods described, inasmuch as their degree of development permits. Their deficiencies, if any, and further research and development needs are indicated.

Additional information

Authors: MOULIN D CEA, F, CEA, F
Bibliographic Reference: EUR 11270 EN (1987) FS, PP 85, BFR 300, AVAILABILITY: CEC-LUXEMBOURG, BP 1003, GDL
Availability: Can be ordered online
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