According to the International Agency on Atomic Energy, 297 research reactors are currently in operation around the world [1]. More than 100 have been in use for over 30 years. Therefore, there is a pressing need to decommission and/or reconstruct them. More than 99% of the total activity of decommissioned reactors is induced activity. The long-term induced activity is of practical interest, since the reactor is held for a considerable time prior to decommissioning or reconstruction. One-dimensional models cannot provide the three-dimensional distribution of induced activity and do not permit the determination of the total activity of the reactor materials.In the present work, two-dimensional calculations of the long-term induced activity (disregarding the activity of the fuel) are conducted for materials from the IRT research reactor at Moscow Engineering-Physics Institute (MEPI), which went into operation in 1967.The two-dimemional model is shown in (R, z) geometry in Fig.

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The restoration and development of Iraq's electric power industry is planned to be carried out on the basis of the concept of intelligent electric networks (smart grid). To implement this concept, it is necessary to create integrated digital models of electrical networks. Such models can be implemented on the basis of methods and tools for modeling electric power systems in phase coordinates. The report presents the results of modeling normal and emergency modes of distribution electric networks of 11 kV.