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The shielding of the heat flux coming from plasma is one of the most limiting factors in plasma-facing component (PFC) design. In fact, the performance of a cooled divertor plate system is limited mainly by the heat transfer capability (maximum value of the critical heat flux, CHF) and by the capability to sustain thermal stresses, even if the maximum allowable heat flux is determined by the thermal conductivity of the protective material (maximum temperature value on the plasma facing surface). A new concept for cooled thermal shield design was devised and tested. Analyses and tests demonstrate that the new concept introduces very high improvement in PFC design, in terms of both heat removal capability (very high CHF) and stress-related performance. Up to 80 MW/m(2) under steady state were applied successfully.

Additional information

Authors: PIZZUTO A, ENEA, Centro Ricerche Energia Frascati, Roma (IT);SANGIOVANNI C, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Paper presented: 15th IEEE/NPSS Symposium on Fusion Engineering, Hyannis (US), October 11-15, 1993
Availability: Available from (1) as Paper EN 37909 ORA
Record Number: 199311441 / Last updated on: 1994-11-28
Original language: en
Available languages: en
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