Ulf Fischer

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The calculation of dose rates after shutdown is an important issue for operating nuclear reactors. A validated computational tool is needed for reliable dose rate calculations. In fusion reactors neutrons induce high levels of radioactivity and presumably high doses. The complex geometries of the devices require the use of sophisticated geometry modelling(More)
A neutronics analysis has been conducted to investigate the streaming effect of fast neutrons in the waveguide channels of the ITER upper port ECRH launcher with the objective to assess the radiation loads to the beam windows. A suitable computational approach based on the Monte Carlo technique has been established to enable proper 3D calculations for the(More)
Timetables are key control elements for railways. They determine all costs for operation but also have a great effect on a railway company ́s revenue, because the utilization of trains depends largely on travel times and available connections. Within this paper, a fully functioning system of so called integrated timetables within Serbia‘s present inter-city(More)
We present an overview of ongoing work on three types of neutron flux monitors under investigation and development for the two European ITER Test Blanket Modules: 1) a neutron activation system, 2) silicon carbide diodes, 3) self-powered neutron detectors for fast neutrons. A pneumatic test system for neutronics tests for a TBM-NAS was constructed at the DT(More)
The recent progress in the R&D neutronics efforts spent in the EU to support the development of the HCLL and HCPB breeder blankets is presented. These efforts include neutronic design activities performed in the frame of the European DEMO reactor study, validation efforts by means of neutronics mock-up experiments using 14 MeV neutron generators, and the(More)
Timetables are key control elements for railways. They determine all costs for operation but also have a great effect on a railway company ́s revenue, because the utilization of trains depends largely on travel times and available connections. In this paper, a fully functioning system of so-called integrated timetables within Serbia‘s present inter-city(More)
An overview is presented of advanced computational tools and methods developed recently for nuclear analyses of Fusion Technology systems such as the experimental device ITER (”International Thermonuclear Experimental Reactor”) and the intense neutron source IFMIF (”International Fusion Material Irradiation Facility”). These include Monte Carlo based(More)
Shielding calculations for the International Fusion Materials Irradiation Facility (IFMIF) are complicated due to the geometrical complexity of the target system and the large-scale bulk shields around the source target. Three-dimensional shielding calculations were performed by using a newly developed Monte Carlo/Deterministic computational scheme. The(More)
A consortium consisting of four EURATOM Associations has been set up to develop the project plan for the full development of the ITER bolometer diagnostic and to continue urgent R&D activities. An overview of the current status is given, including detector development, line-of-sight optimization, performance analysis as well as the design of the diagnostic(More)
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