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The estimation of inventories and permeation fluxes to the coolant in ITER have been performed neglecting the ITER's pulse operation because it was assumed that during plasma-off periods the processes become 'frozen' until the plasma starts again. The present paper shows that this assumption in certain cases may fail, particularly in the first wall of ITER where a larger inventory and permeation flux to the coolant (by an order of magnitude) is obtained when a pulse operation is considered. The calculations are performed with the code TMAP4. The discontinuous nature of the plasma operation is mimicked by imposing on the plasma facing side a heat flux and a particle implantation flux in the form of a quadratic stepwise periodic function oscillating between zero (plasma off) and a maximum value (plasma on).

Additional information

Authors: HOUSIADAS C, JRC Ispra (IT);PERUJO A, JRC Ispra (IT)
Bibliographic Reference: Paper presented: ISFNT-4, Tokyo (JP), April 6-11, 1997
Availability: Available from (1) as Paper EN 40470 ORA
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