5-9 September 2016
Prague Congress Centre
Europe/Prague timezone

P1.124 Evaluation of heat load on CFETR divertor for impurity seeding using SOLPS

5 Sep 2016, 14:20
1h 40m
Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Foyer 2A (2nd floor), 3A (3rd floor)

Prague Congress Centre

5. května 65, Prague, Czech Republic
Board: 124
Poster F. Plasma Facing Components P1 Poster session

Speaker

Xiaoju Liu (Institute of plasma physics chinese academy of sciences)

Description

The Chinese Fusion Engineering Test Reactor (CFETR) is under design. Divertor is the most pivotal PFC to manage power and He ash exhaust. Based on the main goal of CFETR, it has a similar P/R~14 MW/m to ITER. Impurity seeding has been considered a promising means to enhance the radiation from the plasma edge and hence to reduce the target heat load, especially on carbon-free wall conditions. We have simulated the baseline operation scenario parameters by using SOLPS5.0 (B2.5-EIRENE) code package for a vertical lower single null (LSN) divertor configuration. The modeling shows that the peak heat load at divertor targets significantly exceeds the maximum engineering limit (i.e. 10 MW/m22) for the low density steady-state operations without any impurities puffing. The SOLPS simulations also demonstrate that Ar (or Ne, N2) puffing from the top of CFETR device is highly effective in mitigation of the divertor peak heat flux to below 10 MW/m22, and both inner and outer divertor plates achieve detachment near the strike point with puffing rate reach a certain high level for the low density operation. In addition, the radiation loss fraction inside the separatrix will enhances and leads a reduction of the power flux across separatrix as impurities puff rate increase. Further simulations of different divertor geometries and configurations will be performed to optimize CFETR design.

Co-author

Xiaoju Liu (Institute of plasma physics chinese academy of sciences, Hefei, China)

Presentation Materials

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