SOM Calcul Groupe ORTEC

Marseille, France

SOM Calcul Groupe ORTEC

Marseille, France

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Martinez J.-M.,ITER Organization | Jun C.H.,ITER Organization | Portafaix C.,ITER Organization | Alekseev A.,ITER Organization | And 8 more authors.
Fusion Engineering and Design | Year: 2015

Several types of damages have to be prevented in order to guarantee the structural integrity of a structure with regards to RCC-MR; the P-type damages which can result from the application to a structure of a steadily and regularly increasing loading or a constant loading and the S-type damages during operational loading conditions which can only result from repeated application of loadings associated to the progressive deformations and fatigue.Following RCC-MR, the S-type damages prevention has to be started only when the structural integrity is guaranteed against P-type damages. The verification of the last one on the ITER vacuum vessel and ports has been performed by limit analysis with elasto-(perfectly)plastic material behavior. It is usual to employ non-linear analysis when the "classical" elastic analysis reaches its limit of linear application. Some elasto-plastic analyses have been performed considering several cyclic loadings to evaluate also more realistic structural margins of the against S-type damages. © 2015 Elsevier B.V.


Martinez J.-M.,ITER Organization | Jun C.H.,ITER Organization | Portafaix C.,ITER Organization | Choi C.-H.,ITER Organization | And 11 more authors.
Fusion Engineering and Design | Year: 2014

A revision of the ITER Project-Level Load Specification (to be used for all systems of the ITER machine) was implemented in April 2012. This revision supports ITER's licensing by accommodating requests from the French regulator to maintain consistency with the plasma physics database and our present understanding of plasma transients and electro-magnetic (EM) loads, to investigate the possibility of removing unnecessary conservatism in the load requirements and to review the list and definition of incidental cases. The purpose of this paper is to present the impact of this 2012 revision of the ITER Project-Level Load Specification (LS) on the ITER Vacuum Vessel (VV) loads and the main structural margins required by the applicable French code, RCC-MR. © 2014 Elsevier B.V.

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