From 2 November 2020, the autumn semester 2020 will take place online. Exceptions: Courses that can only be carried out with on-site presence. Please note the information provided by the lecturers via e-mail.

Horst-Michael Prasser: Catalogue data in Spring Semester 2017

Name Prof. Dr. Horst-Michael Prasser
Professur für Kernenergiesysteme
ETH Zürich, ML K 13
Sonneggstrasse 3
8092 Zürich
Telephone+41 44 632 60 25
DepartmentMechanical and Process Engineering
RelationshipFull Professor

151-0156-00LSafety of Nuclear Power Plants Information 4 credits2V + 1UH.‑M. Prasser, V. Dang, L. Podofillini
AbstractKnowledge about safety concepts and requirements of nuclear power plants and their implementation in deterministic safety concepts and safety systems. Knowledge about behavior under accident conditions and about the methods of probabilistic risk analysis and how to handle results. Basics on health effects of ionizing radiation, radiation protection. Introduction of advanced nuclear systems.
ObjectivePrepare students for a deep understanding of safety requirements, concepts and system of nuclear power plants, providing deterministic and probabilistic methods for safety analysis, equiping students with necessary knowledge in the field of nuclear safety recearch, nuclear power plant operation and regulatory activities. Learning about key elements of future nuclear systems.
ContentPhysical basics, functioning and safety properties of nuclear power plants, safety concepts and their implementation into system requirements and system design, design basis accident and severe accident scenarios and related physical phenomena, methods of probabilistic risk analysis (PRA level 1,2,3) as well as representation and assessment of results; lessons from experienced accidents, health effects of ionizing radiation, legal exposure limits, radiation protection; advanced active and passive safety systems, safety of innovative reactor concepts.
Lecture notesHand-outs will be distributed
LiteratureKröger, W., Chan, S.-L., Reflexions on Current and Future Nuclear Safety, atw 51 (2006), p.458-469
Prerequisites / NoticePrerequisites: Recommended in advance (not binding): 151-0163-00L Nuclear Energy Conversion and 151-0153-00L "Reliability of Technical Systems".
151-0160-00LNuclear Energy Systems4 credits2V + 1UH.‑M. Prasser, I. Günther-Leopold, S. Hirschberg, W. Hummel, P. K. Zuidema
AbstractNuclear energy and sustainability, Nuclear fuel production, energy and materials balance of Nuclear Power Plants, Fuel and spent fuel handling, Fuel reprocessing, Radioactive waste disposal, Environmental impact of radiation releases.
ObjectiveStudents get an overview on the physical fundamentals, the technological processes and the environmental impact of the full energy conversion chain of nuclear power generation. The are enabled to assess to potentials and risks arising from embedding nuclear power in a complex energy system.
ContentMethods to measure the sustainability of energy systems will be presented, nuclear energy is analysed concerning its sustainability and compared to other energy sources. The environmental impact of the nuclear energy system as a whole is discussed, including the question of CO2 emissions, CO2 reduction costs, radioactive releases from the power plant, the fuel chain and the final disposal. The material balance of different fuel cycles with thermal and fast reactors is examined. A survey on the geological origin of nuclear fuel, uranium mining, refinement, enrichment and fuel rod fabrication processes is given. Methods of fuel reprocessing including modern developments of deep partitioning as well as methods to treat and minimize the amount and radiotoxicity of nuclear waste are described. The project of final disposals for radioactive waste in Switzerland is presented.
Lecture notesThe script will be handed out
151-0170-00LComputational Multiphase Thermal Fluid Dynamics4 credits2V + 1UH.‑M. Prasser, A. Dehbi, B. Niceno
AbstractThe course deals with fundamentals of the application of Computational Fluid Dynamics to gas-liquid flows as well as particle laden gas flows including aerosols. The course will present the current state of art in the field. Challenging examples, mainly from the field of nuclear reactor safety, are discussed in detail.
ObjectiveFundamentals of 3D multiphase flows (Definitions, Averages, Flow regimes), mathematical models (two-fluid model, Euler-Euler and Euler-Lagrange techniques), modeling of dispersed bubble flows (inter-phase forces, population balance and multi-bubble size class models), turbulence modeling, stratified and free-surface flows (interface tracking techniques such as VOF, level-sets and variants, modeling of surface tension), particulate and aerosol flows, particle tracking, one and two way coupling, random walk techniques to couple particle tracking with turbulence models, numerical methods and tools, industrial applications.
151-1053-00LThermo- and Fluid Dynamics Information 0 credits2KP. Jenny, R. S. Abhari, C. Müller, H. G. Park, H.‑M. Prasser, T. Rösgen, A. Steinfeld
AbstractCurrent advanced research activities in the areas of thermo- and fluid dynamics are presented and discussed, mostly by external speakers.

The talks are public and open also for interested students.
ObjectiveKnowledge of advanced research in the areas of thermo- and fluid dynamics
ContentCurrent advanced research activities in the areas of thermo- and fluid dynamics are presented and discussed, mostly by external speakers.
151-1906-00LMultiphase Flow4 credits3GH.‑M. Prasser
AbstractBasics in multiphase flow systems,, mainly gas-liquid, is presented in this course. An introduction summarizes the characteristics of multi phase flows, some theoretical models are discussed. Following we focus on pipe flow, film and bubbly/droplet flow. Finally specific measuring methods are shown and a summary of the CFD models for multiphases is presented.
ObjectiveThis course contributes to a deep understanding of complex multiphase systems and allows to predict multiphase conditions to design appropriate systems/apparatus. Actual examples and new developments are presented.
ContentThe course gives an overview on following subjects: Basics in multiphase systems, pipeflow, films, bubbles and bubble columns, droplets, measuring techniques, multiphase flow in microsystems, numerical procedures with multiphase flows.
Lecture notesLecturing notes are available (copy of slides or a german script) partly in english
LiteratureSpecial literature is recommended for each chapter.
Prerequisites / NoticeThe course builds on the basics in fluidmechanics.
151-2016-00LRadiation-Based Imaging Methods for Nuclear and Industrial Applications4 credits2V + 1UR. Zboray, H.‑M. Prasser
AbstractThe course offers an overview of the engineering principles of radiation-based imaging methods as X-ray/gamma and neutron imaging. Special attention is given to the application of such methods to nuclear engineering, industrial and civil safety problems. The Lecture is complemented with numerical and hands on laboratory exercises.
ObjectiveUnderstanding of the principles and applicability of radiation-based imaging methods as radiography and tomography, their mathematical principles and the necessary data and signal processing methods. The lecture gives an overview of the associated radiation source and imaging detector technologies.
ContentPrinciples of computed tomographic imaging (inverse problems, Radon transformation, central slice theorem); parallel, fan-, and cone-beam and limited angle tomography; image filtering and conditioning methods; back projection algorithms (FBP, ART, direct FFT, FDK); resolution and contrast; scatter and beam hardening artefacts; image rendering and segmentation; Radiation source technology: X-ray tubes/LINACs, synchrotrons, gamma sources, neutron sources (reactor, spallation, accelerator based, neutron generators); detector technology: interaction mechanisms for photons and neutrons, detector materials, resolution and efficiency; applicability and complementarity of photon vs. neutron based imaging techniques; thermal and fast neutron imaging; combined imaging modalities; Applications in nuclear technology: fuel bundle research (thermal-hydraulics, cladding hydration, spent fuel characterization etc.); non-nuclear industrial applications: multi-phase flows in oil and chemical industry, fuel cell research, cultural heritage investigations, PEPT etc.; applications in nuclear safe guards; applications for citizen and homeland security; More exotic approaches: energy selective imaging; TOF, ultra-fast X-ray tomography using deflected electron beams; the course is complemented with numerical exercises and hands on laboratory demonstrations (neutron imaging demo at ICON/PSI, X-ray/gamma imaging at ETH/PSI).
Lecture notesLecture slides, additional readings and exercise materials will be provided.
Literature- Kak & Slaney: Principles of Computerized Tomographic Imaging (
- Knoll: Radiation Detection and Measurement
- Smith: The Scientist and Engineers Guide to Digital Signal Processing (
- Natterer: The Mathematics of Computerized Tomography, Wiley, 1986
- Neutron imaging flyer, PSI (
Prerequisites / NoticeBasic nuclear physics, recommended courses: 151-0163-00L Nuclear Energy Conversion, 151-2035-00L Radiobiology and Radiation Protection, 151-0123-00L Experimental Methods for Engineers, MATLAB skills for exercises.