Title :
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
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;
Conference_Titel :
Fusion Engineering (SOFE), 2013 IEEE 25th Symposium on
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4799-0169-2
DOI :
10.1109/SOFE.2013.6635460
