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Latest News
Steam is a sign of cooling system function . . . at ITER
Steam from one of ITER’s ten induced-draft cooling cells offers visual confirmation of a successful cooling system test, the ITER organization announced April 30. ITER’s cooling system features 60 kilometers of piping with pumps, filters, and heat exchangers that can pull water through at up to 14 cubic meters per second. Once fully operational, two cooling loops—one to remove the heat generated by the plasma in the ITER tokamak and one for its supporting infrastructure—will be capable of extracting up to 1,200 MW of heat.
Yujiro Ikeda, Fujio Maekawa, Robert Johnson, Yoshimi Kasugai, Yoshitomo Uno, Edward T. Cheng
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 714-718
Neutronics Experiments and Analysis | doi.org/10.13182/FST98-A11963698
Articles are hosted by Taylor and Francis Online.
Induced radioactivity characteristics of vanadium alloys irradiated with 14 MeV neutrons were investigated. Short and long 14 MeV irradiation modes were employed to distinguish the characteristic of radioisotopes according to their half-lives. Radioactivities in several different V-alloy samples were measured by the γ-ray spectrometry. Along with the radionuclides induced in the major constituents, those from impurities were simultaneously identified by the activation analysis. The decay profiles of the induced radioisotopes were compared with the calculation using the comprehensive activation cross section libraries of FENDL/A-2,.0 and JENDL-ACT96. From the ratios of calculation and experiment (C/E), it was proved that the FENDL/A-2.0 and JENDL-ACT96 are adequate to predict the dominant radionuclide in V, Ti, and Cr. However, there was significant underestimation for activation products of impurities of Si, Fe, Ni, Nb and possibly Mo. In particular, the amounts of Nb impurity, which ranges from 70 to 100 ppm, is almost the same as that of the chemical analysis.