Experimental test of structural materials activation in the IFMIF neutron spectrum

Activation cross sections contained in a new evaluated library, the interme diate energy activation file (IEAF-99), were tested in an integral experime nt with a neutron spectrum Very closely resembling the spectrum of the proj ected international fusion materials irradiation facility (IFMIF) by irradi ating samples of SS-316 steel, F82H steel, pure vanadium, and V-4Ti-4Cr all oy. gamma -Spectrometry of the samples yielded induced activities of more t han 40 product nuclides. By comparison with calculations using IEAF-99 and the ALARA inventory code, calculation-over-experiment ratios were obtained, the majority of which is within a factor of 2 from unity. (C) 2000 Elsevie r Science B.V. All rights reserved.