High thermal performance divertor plate : Optimization of the monobloc divertor plate by the use of ultra-high thermal conductivity carbon fibres
A conceptual study of an advanced divertor plate is presented. The essential feature of the new concept, apart from the use of ultrahigh conductivity carbon fibres, is the use of a single material, a CFC composite, for the whole structure. The coolant is helium gas. The main advantages of this solution are: elimination of the severe joint-interface problems inherent in other multimaterial solutions, avoidance of the risk of burn-out, no damage caused by run-away electrons, low-activation properties, great tolerance towards off-normal operating conditions, great reduction of mechanical stresses induced by electromagnetic transient and ease of baking at high temperature. The maximum computed temperature is about 1000 C and the required pumping power is approximately only 30% higher than a corresponding cooling performed by water in swirl-tubes. The operating conditions are those of the outer divertor plate of the Next Step experimental reactor: i.e. the heat flux distribution shows a peak value of 15 MW/m2 and the width at half-maximum is 10 cm, the total deposited power being 80 MW.
Bibliographic Reference: EUR 13594 EN (1992) 66 pp., MF, ECU 4, blow-up copy ECU 10.50
Record Number: 199210552 / Last updated on: 1994-12-02
Original language: en
Available languages: en