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The present work describes the contribution of the Joint Research Centre Ispra to the IAEA benchmark exercise "Lifetime Behaviour of the First Wall of Fusion Machines". The results of the numerical analysis of the reference thermal fatigue experiment are presented, and the numerical analysis of thermal stress is discussed, particularly in relation to its influence on the stress field evaluation. The American nuclear code ASME and the French code RCC-MR are applied and the reasons for the different results obtained are investigated. The main problems regarding a realistic fatigue lifetime evaluation are highlighted. This work is intended as the basis for a discussion focussing on the main characteristics of the thermal fatigue problem from both a numerical and a lifetime assessment point of view. It is seen that the present margin of discretion left to the analyst may cause undue discrepancies in the results obtained. A sensitivity analysis of the main parameters involved is desirable and more precise design procedures should be stated.

Additional information

Authors: MEROLA M, JRC Ispra (IT)
Bibliographic Reference: EUR 14028 EN (1992) 44 pp., MF, ECU 4, blow-up copy ECU 7.50
Availability: (2)
Record Number: 199210446 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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