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000837261 1001_ $$0P:(DE-HGF)0$$aHeinola, K.$$b0$$eCorresponding author
000837261 245__ $$aLong-term fuel retention and release in JET ITER-Like Wall at ITER-relevant baking temperatures
000837261 260__ $$aVienna$$bIAEA$$c2017
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000837261 520__ $$aThe fuel outgassing efficiency from plasma-facing components exposed in JET-ILW has been studied at ITER-relevant baking temperatures. Samples retrieved from the W divertor and Be main chamber were annealed at 350 and 240 °C, respectively. Annealing was performed with thermal desoprtion spectrometry (TDS) for 0, 5 and 15 h to study the deuterium removal effectiveness at the nominal baking temperatures. The remained fraction was determined by emptying the samples fully of deuterium by heating W and Be samples up to 1000 and 775 °C,respectively. Results showed the deposits in the divertor having an increasing effect to the remaining retention at temperatures above baking. Highest remaining fractions 54 and 87$ \% $ were observed with deposit thicknesses of 10 and 40 μm, respectively. Substantially high fractions were obtained in the main chamber samples from the deposit-free erosion zone of the limiter midplane, in which the dominant fuel retention mechanism is via implantation: 15 h annealing resulted in retained deuterium higher than 90$ \% $ . TDS results from the divertor were simulated with TMAP7 calculations. The spectra were modelled with three deuterium activation energies resulting in good agreement with the experiments.
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000837261 7001_ $$0P:(DE-HGF)0$$aLikonen, J.$$b1
000837261 7001_ $$0P:(DE-HGF)0$$aAhlgren, T.$$b2
000837261 7001_ $$0P:(DE-Juel1)129976$$aBrezinsek, S.$$b3
000837261 7001_ $$0P:(DE-HGF)0$$aDe Temmerman, G.$$b4
000837261 7001_ $$0P:(DE-HGF)0$$aJepu, I.$$b5
000837261 7001_ $$0P:(DE-HGF)0$$aMatthews, G. F.$$b6
000837261 7001_ $$0P:(DE-HGF)0$$aPitts, R. A.$$b7
000837261 7001_ $$0P:(DE-HGF)0$$aWiddowson, A.$$b8
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