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The ITER divertor plate option considered consists of an armour of graphite tiles, each crossed by two tubes of the water cooling system. The study takes into account many different thicknesses, three materials for the graphite and two for the tubes. The investigation is related to conditions with plasma burning continuation or with plasma shut-down. The undercooling transients involve LOCAs in one single tube or in both tubes, in order to evaluate, for safety purposes, the efficiency of a design with two independent cooling circuits. The results show that for cases with plasma burning continuation, a double cooling system could be relevant for safety only if Pyrolitic Graphite (PG) armour and Mo-Re tubes are considered. For cases with plasma shut-down, the SEP-Carb with Mo-Re tubes solution could also be effective, but the results are strongly dependent on the plasma shut-down transient.

Additional information

Authors: RENDA V, JRC Ispra (IT);PAPA L, JRC Ispra (IT);ROCCO P, JRC Ispra (IT);SORIA A, Departmento Ingeniera Nuclear, ETS Ingenieros Industriales, Madrid (ES)
Bibliographic Reference: Paper presented: 16th Symposium on Fusion Technology, London (GB), Sept. 3-7, 1990
Availability: Available from (1) as Paper EN 35329 ORA
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