chapter  5
Shell buckling
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Buckling of shells is an important consideration for design and evaluation of the inner steel containments for the double-shell structures. There are extensive data on buckling of cylindrical shells under uniform membrane compressive loads. The buckling strength increases with a small amount of internal pressure but ultimately, there is little compressive strength left when the internal pressure is very high. These phenomena were investigated for high-level containments as part of the BNL study and compared with available data (Reference 5). The European recommendations (Reference 6) appear to be too conservative when the hoop stress is high. An example is shown in Figure 4. The BNL results were obtained for a stainless-steel

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p(R /t)/Fy

alloy cylinder and compared with the corresponding European (Reference 6) and New Zealand (Reference 7) results. Earthquake experiences and experimental data