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This study is performed in order to suggest a preferred route to be followed for implementing the design rules and requirements of the design codes, such as ASME, RCC-MR and/or others, in the design of ITER, and to make a preliminary assessment on which of the in-service loading conditions inflicts the highest damage on the structure. The ITER framework is such that adherence, as much as possible, to existing design codes is required. Any necessary modifications called for must be minor. The rationale of using the strain-deformation (or strain-life) method for design for a device such as ITER are presented and analysed. The study also presents some of the relevant design code rules and constraints and discusses the prediction of lifetime and fatigue damage, with some data on fatigue life for 316SS. A design curve for strain range versus number of cycles to failure is presented, including the effect of neutron damage on the material. A sample calculation is performed on a first-wall section and a preliminary estimate of the fatigue usage factor is presented. The conclusion is that the load-controlled approach shifts the emphasis to the regulator and licensing body whereas the strain-deformation approach shifts the emphasis to the designer and structural analyst.

Additional information

Authors: KARDITSAS P J, AEA Fusion, Culham Laboratory, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: UKAEA FUS 282 EN (1995) 21 pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon. OX14 3DB (GB)
Record Number: 199510315 / Last updated on: 1995-03-08
Original language: en
Available languages: en
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