Enhanced Safety & Operation Excellence

Focus Session

Tuesday, 16 May 2017, 14:00 – 17:30

Coordinator: Erik Baumann, AREVA GmbH, Germany
Co-Coordinator: Dr. Angelika Bohnstedt, Karlsruhe Institute of Technology (KIT), Germany


Radiation Protection – What about the Basic Principles and Objectives in the Current Regulatory Environment?

The objectives of radiation protection are to minimize the negative health effects due to radiation. Over many past decades, the regulatory environment, i.e. the various international and national codes and standards but also recommendations issued by IAEA and IRCP, was always subject to continuous development reflecting up to date knowledge and experience. Currently, discussions focus on “new” areas of human activities like decommissioning and on “new radioactive substances” and potential threats associated with their handling (handling and treatment of substances containing naturally occurring radioactive materials) Latter already became subject to regulations issued by EURATOM.  For topics like decommissioning, statement can be found doubting that the existing regulations address radiation protection in a sufficient manner.

“To lower the radiation risks” – This is exactly the matter of interest. How low is low enough? What about ALARA principles? Do they still apply or do we take about minimization? What does the discussion of current regulations and their interpretation mean in this context?

This session addresses some of these questions and tries providing some answers. Some of the presentations will give an introduction and produce questions. The answer might be gained during lively discussions between the session participants.


40 Year of Expert Support and Consulting of Governmental Organizations – a Topic of National and International Harmonization (An Overview of Implantation of Basic Safety Standards (BSS) the Council Directive 96/29/EURATOM into German Regularity Standards on the Example of Exemption and Clearance Levels

Dr. Stefan Thierfeldt, Member of the German Commission of Radiation Protection, Brenk Systemplanung GmbH, Germany (tbc)

14:30Hormesis – a Miracle in Reality? Discussion requiredJan-Christian Lewitz, CEO, LTZ-Consulting GmbH, Germany
15:00Radiation Instrumentation and Measurement Technologies for High Radiation FieldsDr. Marina Sokcic-Kostic,  Principal Engineer and Technical Project Manager, NUKEM Technologies Engineering Services GmbH, Germany
16:00Predictions of Expected Dose Rates by validated Activation Calculations as Input for a Step-wise Decommissioning and Dismantling of a Nuclear Power PlantDr. Luc Schlömer, Dr. Sven Tittelbach and Prof. Dr. Peter-Wilhelm Phlippen, Wissenschaftlich-Technische Ingenieurberatung GmbH (WTI), Germany
16:30End of Session

Subject to change.

Tuesday, 16 May 2017, 14:00 - 17:30

Coordinator: Dr.-Ing. L. Mohrbach , VGB PowerTech e.V., Germany

Nuclear Power Plants generate about 14% of the global electricity, still by far more than twice the output of the combined power from wind and solar sources. Nearly all nuclear units achieve high availabilities in the 90%-range, benefitting from an extensive wealth of operating experience.

After the post-Fukushima modernisations, there are still issues and further developments, some of these will be presented in this session.

14:00Operator Contributions to Reactor Safety Commission IssuesThomas Hanisch, VGB PowerTech e.V., Germany
14:30Evaluation of WANO SOER - Intake Cooling Water BlockageUlrich Sander, EnBW Kernkraft GmbH, Germany
15:00Development in Lifting and Rigging in Nuclear Power Plants at RWE

Johannes Rinio, RWE Power AG, Germany

16:00Workplace Safety in Nuclear Power PlantsRoland Schöllhorn, WANO Paris Center and Guido Schwabe, VGB PowerTech e. V., Germany
16:30Evolution of IT-Security within PreussenElektraThomas Walter, PreussenElektra GmbH, Germany
17:00Load Following and Reactivity Management in a Volatile Market EnvironmentFabian Stuber, Isar NPP, PreussenElektra GmbH, Germany
17:30End of Session

Subject to change.

Wednesday, 17 May 2017, 13:00 -17:30

Coordinator: Dr. Winfried Zwermann, Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany


The session provides an overview of international research and development with respect to supplementing reactor core simulations with uncertainty and sensitivity analyses, in research institutes as well as within the nuclear industry. These analyses not only focus on light water reactors, but also on advanced reactor systems. Particular emphasis is put on international benchmarks in the field.


Approach for Testing Multi-Physics Uncertainty Propagation in Reactor Core Calculation within the Framework of OECD/NEA LWR UAM Benchmark

Kostadin Ivanov, Professor, North Carolina State University, USA
13:30Overview of the UPM-CSN Activities for Uncertainty Quantification in PWR Full Core Simulations

Nuria García Herranz, Professor, Universidad Politécnica de Madrid, Spain
Rafael Mendizábal, Technical Staff, Spanish Nuclear Safety Council, Spain

14:00Improving Reactor Core Simulations Based on Operational Feedback by Bayesian InferenceAxel Höfer, AREVA GmbH, Germany
14:30Uncertainty Analyses at PSIAndreas Pautz ı Professor, Paul Scherrer Institut; École Polytechnique Fédérale de Lausanne, Switzerland
15:30The IAEA Coordinated Research Project on HTGR Physics, Thermal-Hydraulics, and Depletion Uncertainty AnalysisFrederik Reitsma, Scientific Secretary, International Atomic Energy Agency, Austria
16:00Uncertainty Analysis of Advanced Reactor Systems with the XSUSA CodeFriederike Bostelmann ı Research Expert, Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany
16:30The Role of Data Assimilation in Validation and Uncertainty QuantificationEvgeny Ivanov, Research Expert, Institut de Radioprotection et de Sûreté Nucléaire, France
17:00Experience in Using the S/U Analysis for Basic Data Validation and Other Fission/Fusion Reactor ApplicationsIvan-Alexander Kodeli, Professor, Institut »Jožef Stefan«, Slovenia
17:30End of Session

Subject to change.

Technical Session

Wednesday, 17 May 2016, 09:00 -15:00

Chair of Review Committee: Dr. Thorsten Hollands, Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany
Keynote Coordinator: Dr. Erwin Fischer, PreussenElektra, Germany

Fuel and Materials
Chair: Dr. Thorsten Hollands, Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany
09:00Keynote: The Role of Safety Regulator for Excellence in Safety of Nuclear Power Plant OperationMinR Volker Wild, Federal Ministry for the Environment, Nature Conservation, Building and Nucelar Safety (BMUB), Germany
09:15Heavy Ions Irradiation as a Tool to Minimize the Number of In-Pile Tests in UMo Fuel DevelopmentDr. Harald Breitkreutz, Technische Universität München, Forschungs-Neutronenquelle Heinz Maier-Leibnitz, Germany
09:45Investigations of Long-Term Interactions Between Graphite Dust and Hot Metallic Surfaces Under High Temperature Reactor ConditionsAndreas Andris, Technische Universität Dresden, Professur für Wasserstoff- und Kernenergietechnik, Germany
Containment and SFP
Chair: Dr. Thorsten Hollands, Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany
10:30Keynote: How Safe is Safe Enough After 50 Years of NPP Operational Experience?Uwe Jorden, PreussenElektra GmbH and Member of the Reactor Safety Commission (RSK), Germany
10:45Detective Application Security Controls for Nuclear SafetyDeeksha Gupta, AREVA GmbH, ICPGOP, Germany 
11:00NIS-PAR - Passive Autocatalytic Recombinersfor Depletion of Hydrogen in Nuclear Power Plantsduring Severe AccidentsHans-Joachim Scholtka, Siempelkamp NIS Ingenieurgesellschaft mbH, Decommissioning and Consulting, Germany
11:15Preliminary Results on Simulation of Re-Entrainment Phenomena with the Containment Code System COCOSYSTobias Jankowski, Ruhr-Universität Bochum, Chair of Energy Systems and Energy Economics, Germany
11:30Blind Simulation of the TH28 Experiment with COCOSYSPhilipp Gurski, Ruhr-Universität Bochum (RUB), Chair of Energy Systems and Energy Economics (LEE), Germany 
11:45Convective Heat Transfer of an Air Cooled BWR Spent Fuel AssemblyChristine Partmann, TU Dresden, Institut für Energietechnik, Professur für Wasserstoff- und Kernenergietechnik, Germany
12:00Lunch Break
Safety Management and Transport
Chair: Dr. Jürgen Sydow, TÜV NORD EnSys GmbH & Co. KG, Germany
13:00Keynote: Leadership for Safety – a Key Organizational Contributor for Safe NPP OperationBert Poeten, KSG Kraftwerks-Simulator Gesellschaft mbH/GfS Gesellschaft für Simulatorschulung mbH, Germany
13:15Introduction of and Experience with Severe Accident Management Guidelines in the Nuclear Power Plants of PreussenElektraDr. Hans Georg Willschütz, PreussenElektra GmbH, Systems Engineering and Safety Analysis, Germany
13:45Advanced Load Following Control with Visualized Reactivity Management (ALFC)Andreas Kuhn, AREVA GmbH, DTITY-G, Germany
14:15Progress in Deterministic Safety-Relevant Actions During Seismic EventsPaul Kluczewski, AREVA GmbH, Germany
Melt Coolability
Chair: Dr. Jürgen Sydow, TÜV NORD EnSys GmbH & Co. KG, Germany
14:30Influence of Different Sintering Temperatures on Simulant Material for Experiment of Melt CoolabilityShrikant Verma, Malaviya National Institute of Technology, Jaipur, Rajasthan, India 
14:45Experimental Assessment of Ex-vessel Melt Coolability under Bottom Blooding Technique Vis-à-Vis Fuel-Coolant InteractionPh.D. Nitendra Singh, India
15:00End of Session

Subject to change.