Impact of pulsed operation on lifetime of DEMO blanket

Author

Aktaa, Jarir ; Boccaccini, Lorenzo V. ; Bachmann, Christian

Author_Institution

Inst. for Appl. Mater., Karlsruhe Inst. of Technol. (KIT), Eggenstein-Leopoldshafen, Germany

fYear

2013

Firstpage

1

Lastpage

4

Abstract

The impact of pulsed operation on thermo-mechanical fatigue and creep-fatigue lifetimes of DEMO blanket is evaluated. Non-linear finite element (FE) analyses are performed for the current design of the helium cooled pebble bed test blanket module (HCPB-TBM), and assessed predicting the cyclic lifetime by evaluating the damage evolution obtained in the component for the candidate structural material. Therewith the influence of the pulse duration on the cyclic lifetime and hence full operation lifetime of the HCPB-TBM is investigated and evaluated considering the gain in operation time due to pulse durations longer than that specified for ITER. For very long pulse durations the gain in operation time is reduced due to creep-fatigue and consequently optimal pulse duration exists.

Keywords

Tokamak devices; creep; fatigue; finite element analysis; fusion reactor blankets; fusion reactor design; plasma simulation; plasma toroidal confinement; DEMO blanket lifetime; HCPB-TBM operation lifetime; ITER; creep-fatigue lifetimes; damage evolution evaluation; helium cooled pebble bed test blanket module design; nonlinear finite element simulations; optimal pulse durations; pulsed operation impact; thermomechanical fatigue pulsed operation; Europe; Fatigue; Finite element analysis; Load modeling; Loading; Materials; Steady-state; DEMO; blanket; creep-fatigue; fatigue; lifetime; pulsed operation;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering (SOFE), 2013 IEEE 25th Symposium on

Conference_Location

San Francisco, CA

Print_ISBN

978-1-4799-0169-2

Type

conf

DOI

10.1109/SOFE.2013.6635460

Filename

6635460