Effect of helium on fatigue crack growth and life of reduced activation ferritic/martensitic steel

Nogami, Shuhei; Takahashi, Manabu; Hasegawa, Akira; Yamazaki, Masanori

doi:10.1016/j.jnucmat.2013.02.031

Cited by 6 publications

(1 citation statement)

References 10 publications

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“…The current design codes presuppose the high ductility and plastic hardenability of the structural material in order to secure the structural integrity at the highly stress concentrated region of structurally discontinuous parts under a variety of transient loading condition changes [107]. This presupposition make it possible to exclude the impact of flaws or damage which could not be detected by non-destructive testing.…”

Section: Evaluation Of Operational Risks For 8-9% Cr Rafms and Possib...mentioning

confidence: 99%

Development of benchmark reduced activation ferritic/martensitic steels for fusion energy applications

et al. 2017

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Reduced-activation ferritic/martensitic (RAFM) steel is the benchmark structural material for in-vessel components of fusion reactor. The current status of RAFM developments and evaluations is reviewed based on two leading RAFM steels, F82H and EUROFER-97. The applicability of various joining technologies for fabrication of fusion first wall and blanket structures, such as weld or diffusion bonding, is overviewed as well. The technical challenges and potential risks of utilizing RAFM steels as the structural material of in-vessel components are discussed, and possible mitigation methodology is introduced. The discussion suggests that deuterium-tritium fusion neutron irradiation effects currently need to be treated as an ambiguity factor which could be incorporated within the safety factor. The safety factor will be defined by the engineering design criteria which are not yet developed with regard to irradiation effects and some high temperature process, and the operating time condition of the in-vessel component will be defined by the condition at which those ambiguities due to neutron irradiation become too large to be acceptable, or by the critical condition at which 14 MeV fusion neutron irradiation effects is expected to become different from fission neutron irradiation effects.

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Section: Evaluation Of Operational Risks For 8-9% Cr Rafms and Possib...mentioning

confidence: 99%