MMARS
  • Next Event:  NINE Headquarters, LUCCA (Italy), 11-15 November 2019

                

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History and Experience
MMARS started in 2015 and the first editions were held at NINE headquarters in Italy with a total participation of about 70 participants. The courses’ programmes are provided by several lecturers coming from different organizations and who are experts in developing and applying models and methods for carrying out advanced safety analysis.


Objective
The MMARS Platform provides a set of parallel Courses to transfer the experience and know-how of recognized experts in applying computational tools for carrying out safety analysis. Best practice and advanced methods for building, assessing and finally exploiting the Evaluation Models constitute the main subjects of the MMARS courses. The courses cover several aspects of the safety analysis with the goal to demonstrate how the computational tools/evaluation models can simulate phenomena expected in thermal-hydraulics (system and core), fuel performance and severe accident. In addition, MMARS platform offers advanced course on “Scaling Analysis”, “Best Estimate Plus Uncertainty”, “Risk Quantification and PSA”, “Preparation and Review of Safety Related Documentation” and "Radiological Consequence Analysis".
New courses are going to be organized starting from 2019 dealing with “Rad-Waste Characterization” and “Radioprotection”. Each course consists of 35 hours.

 

Expected Products

The Training Courses provide a transfer of experience and know-how from recognized experts in the respective fields. It thus contributes to maintaining and increasing technical competence and to ensuring the sustainable development of nuclear technology. All Lectures and Exercises are distributed to the participants. A certificate of attendance is released.


 

Available Parallel Courses     (for details, click on the MMARS-Programme menu on the right)
 


System Thermal-hydraulics Analysis: Phenomenology and Computational Evaluation Model         
                       
    
Description:
The objective of the course is to prepare NPP computational evaluation model to address relevant safety phenomena, like CHF, CCFL, Reflux Condensation, Natural Circulation, Break Flow, ECC bypass, Pressurizer Behavior, Phases Separation, Steam binding etc… during selected accidents (LOFW, SGTR, SBLOCA, LBLOCA etc…). Additionally the course covers the issue related with the qualification of the NPP evaluation models, including qualitative and quantitative analysis. The different approaches on how to perform the uncertainty evaluation are also presented with particular emphasis to the method based on propagation of output accuracies.
Instructors: D. De Luca (NINE), M. Cherubini (NINE), A. Petruzzi (NINE)
Registration Fee: 3000 / 3200 euros (early/late registrations)


Thermal-Hydraulics Core Analysis: Phenomenology and Computational Tools                                                                                                       
 
Description:
A detailed modeling of the core is becoming more important in response of the industry toward higher utilization factor. Fuel cycles increased from 12 months to 18 months and more recently to 24 months over the last three decades and average discharge burnup almost doubled in the same time period. New fuel degradation phenomena have been discovered and, as result, regulatory requirements evolved to reflect the new knowledge gathered. A detailed analysis of the core component is now typical for most scenarios, both Anticipated Operation Occurrences (AOOs) and Design Basis Accidents (DBAs). Moreover a detailed core thermal-hydraulic model is required in various disciplines associated with core engineering (core design, fuel rod design, subchannel analysis, etc.). The trend is now to develop detailed core models in the framework of multiphysics tools.  The objective of this course is to review the model needs with focus on the core component and the approach taken for various scenarios. The course provides an overview of the computer codes used to perform safety analyses and address core engineering problems. Students can learn about the purpose and various uses of these methods.

Instructors: M. Avramova (NCSU), C: Frepoli (FPoliSolution), V. Parrinello (NINE)
Registration Fee: 3000 / 3200 euros (early/late registrations)


Fuel Behavior Analysis: Phenomenology and Computational Tools        
 
Description:
The aim of the training is to provide both practical and theoretical insights on nuclear fuel behavior. Nuclear fuel undergoes continues changes while it is irradiated. Such changes affect the thermo-mechanical fuel characteristics and hence the fuel behavior and response both under normal and off-normal conditions. A series of relevant phenomena are illustrated and discussed within the theoretical part and addressed into the practical sessions by hands-on training on suitable computational tools.

Instructors: M. Cherubini (NINE), F. Corleoni (NINE)
Registration Fee: 2800 / 3000 euros (early/late registrations)



Severe Accident Analysis: Phenomenology and Computational Tools
 
Description:
The severe accidents at Three Mile Island (TMI), Chernobyl, and Fukushima are a reminder that commitment to nuclear power includes a commitment to public safety.  The nuclear industry recognized early the potential hazards of nuclear power.  Severe accident has acquired an increasing relevance from the point of view of licensing and some severe accident are now recognized and included in the design basis accidents.  Features to prevent, contain, and otherwise protect the public from reactor accidents were applied from the outset.  As the industry has evolved, so has safety in the form of design features and strategies to both prevent severe accidents and mitigate consequences should they occur.  This course presents both historical and technical information regarding severe accidents in the design and safety assessment of nuclear power plants.  It is divided into daily morning theory and afternoon practice sessions.  Theory aspects address phenomenology, accident progression, challenges to containment integrity, and radiological release and transport, computational tools.  Practice aspects address licensing, computer codes applications, deterministic and probabilistic evaluation methods, and modeling.

Instructors: W. Giannotti (NINE), R. P. Martin (BWXT), R. Sanders (AREVA)
Registration Fee: 2800 / 3000 euros (early/late registrations)



Scaling Analysis
 
Description:
Scaling is a reference ‘key-word’ in nuclear engineering, due to impossibility to get access to measured data in case of accident in nuclear reactors. The relevance of scaling in the water cooled nuclear reactor technology and the associated scaling issue constitute the motivation for this course. General presentation of the scaling issue and an overview of applied scaling methodologies like: Power to Volume Ratio (or Volumetric Scaling Approach), Three-level Scaling Approach, Triad Method Scaling Approach, Hierarchical, Two-Tiered Scaling (H2TS) and Fractional Scaling Analysis (FSA), are presented first. A short presentation of available data for scaling studies followed by some examples based on Separate Effect Tests (SET) and Integral Effect Tests (IET) like: Pressure Responses of Reactor and Containment Vessels, Countercurrent Flows, Mixing and Natural Circulation in Containment Vessel, Mixing and Boron Dilution in Reactor Vessels are presented next. The EMDAP (Evaluation Model Development and Assessment Process) is then illustrated as a roadmap to develop an assessment process and make an adequacy decision for thermal hydraulics codes applicability in nuclear industry. The role of scaling analysis in EMDAP process related to evaluating scalability of SETs, IETs and Thermal Hydraulics System codes is presented and discussed. Also, the use of Thermal Hydraulics System Codes as a tool for scaling analysis and potential issues are discussed and followed with an example for an IET related to Small Modular Rector. The example presents H2TS and FSA hierarchical decomposition of the plant and test facility systems in space as well as accident scenario decomposition in time sequences. Based on the time scaling approach the derivation of equations for two figures of merits, reactor and containment vessels pressure responses and reactor vessel liquid level, is illustrated. The quantification of each term, representing separate agent of change, enables PIRT (Phenomena Identification and Ranking Table) quantification and calculation of scaling distortions. The efficiency of top-down and sufficiency of bottom-up scaling analysis steps are illustrated for several time sequences, and followed with quantification of scaling distortions. The quantified distortions indicate needed improvements in test facility designs and Thermal Hydraulics System codes. An additional topic of the course will be devoted to a particular aspect of the scaling analysis to provide support for the qualification of a NPP Evaluation Model though the “Kv-Scaling Calculation”. An overview of scaling analyses methodologies provides theoretical aspects while the specified practical examples enable familiarity with scaling analysis details.

Instructors: M. Dzodzo (Westinghouse), W. Giannotti (NINE), A. Petruzzi (NINE)
Registration Fee: 2800 / 3000 euros (early/late registrations)


Best Estimate Plus Uncertainty  
 
Description:
Best Estimate Plus Uncertainty (BEPU) methodology implies application of 'realistic' or the so-called 'best estimate' computational codes with uncertainty quantification to the thermal-hydraulic safety analyses of nuclear power plants within the licensing process. The course provides both theoretical lectures, dealing with the licensing aspects and the different available uncertainty methodologies, and practical aspects including hands-on training (both with methods based on propagation of input uncertainties and on propagation of output accuracies) and industrial case studies.

Instructors: A. Petruzzi (NINE), C. Frepoli (FPoliSolutions), R. P. Martin (BWXT)
Registration Fee: 3000 / 3200 euros (early/late registrations)


Advanced Course on Key Elements of Risk Quantification and PSA
 
Description:
The objective of this course is to give participants adequate knowledge of selected elements and aspects of the probabilistic safety analysis (PSA) and risk quantification which are of highest importance but are usually only briefly touched at the training courses aiming at providing a practical overview of PSA as a whole. The intent is to make the participants understand the key elements of quantitative risk modeling regardless of the software to be used and of the facility or system to be modeled, and to enable them, thus, to build the quantitative risk model by means of any software tool and for any industry or particular facility. PSA training courses many times focus on event trees and fault trees which are the skeleton of the risk model for any complex system. In engineering practice (and nuclear safety engineering in particular), however, no fault tree for a system or function should be developed by an analyst who does not have the essential knowledge in the topics which include reliability engineering (with underlying knowledge of probability theory), human reliability analysis (HRA) techniques, quantitative parameters estimate and quantitative treatment of uncertainty, to name some of them. Likewise, any member of a PSA / risk quantification project or group should understand the principles of the risk curve and the roles of deterministic safety margin analyses and probabilistic risk analyses in the design verification process. This course purposefully does not involve work on or presentation of any particular PSA software tool. However, it includes practical examples concerning relevant aspects of risk quantification by means of the elementary tools such as spreadsheets or “manual” calculations, which provide the first-hand experience. The overall course is divided into the nine main topical areas covered by nine lectures.

Instructors: I. Vrbanic (APOSS)
Registration Fee: 2600 / 2800 euros (early/late registrations)


Preparation and Review of Licensing Documentation (FSAR)
 


Description:
The objective of the seminar is to develop practical skills required for the preparation and review of the safety related documentation. Target audiences are staff of the regulatory bodies, technical supporting organizations and plant personnel involved in the process of the preparation and review of the safety documentation. Concept of the safety assessment process is discussed including the relevant safety issues, such as defense in depth, graded approach, basic safety functions etc. The seminar primarily focuses on preparation and review of design basis deterministic safety analyses and includes practical exercises on review of selected parts of the SAR of existing PWR, BWR and VVER. Simplified plant simulator calculations are used during the exercises to enhance the development of review and evaluation skills. The safety assessment requirements practiced during the seminar are based on IAEA safety standards.

Instructors: M. Modro (NINE), M. Kristof (NINE)
Registration Fee: 2600 / 2800 euros (early/late registrations)


Radiological Consequence Analysis
 


Description:
The fundamental objective of nuclear safety is to protect the environment and the general public from harmful effects of ionizing radiation. To achieve this objective the safety analyst has to provide, among other things, which consequences are to be expected in case of a release of radioactive materials from a nuclear facility. This is the goal of “Radiological Consequence Analysis” RCA. This course will explain all aspects of RCA, starting from the scope of RCA up to the actual analysis. Within licensing analysis, the analyst has to show that also under severe conditions the environment and the general public are protected. Main focus here is placed on the close-up range of the nuclear power plant, models are simple and conservative. On the other hand, in the field of civil protection and catastrophe management, models need to cover long range and are aiming to be as accurate as possible. The course will cover both applications, explain boundary conditions, tools and models used.

Instructors: N. Muellner (BOKU), W. Giannotti (NINE)
Registration Fee: 2600 / 2800 euros (early/late registrations)

 


Decommissioning, Waste Management and Environmental Site Remediation
 
Description:
The operative time of early designed NPP was established in about 30 years. Life extension programs moved this limit to about 50 years. However a number of NPP and nuclear facilities have arrived to the end of their operative time and the decommissioning phase is approaching and in very few cases completed.
Decommissioning is one of major stages in the lifetime of an authorized facility and it is constituted by the administrative and technical actions taken to allow the removal of the regulatory controls from a facility. Decommissioning includes: preparation of a decommissioning plan, collection of relevant information and data, selection of a decommissioning strategy, radiological characterization of the facility, estimation of costs, management of radioactive waste and non-radioactive waste, safety assessment of workers, population and of the environment. All these actions must be performed in the respect of the rules of the regulatory body.
Many technological areas are treated and the course is articulated in three levels. The Level 1 is focused on basic concepts, theoretical and regulatory aspects. Some sessions have also practical activities. Level 2 includes some of the Level 1 arguments which are addressed in a deeper detail and sessions have more activities devoted to practices and illustration of operative experiences. Level 3 is largely devoted to practices and focused on the organization and managing of the plan of the decommissioning phase.

Instructors: W. Giannotti (NINE), K. Kristofova (NINE), M. Morichi (CAEN-SYS), A. Pepperosa (CAEN-SYS)
Registration Fee: 2800 / 3000 euros (early/late registrations)


Regulatory Fundamentals and Best Regulatory Practices
 


Description: This course is designed with primarily staff from the nuclear regulatory organizations in mind. As other courses, it aims to transfer the experience and know-how of recognized experts in the field to those who are beginning their career or wish to benchmark their knowledge and skills against practices of their peers. Thus, the lectures will summarize the highlights of some of the national experiences and the international guidance from the leading organizations. While touching upon the origins of the safety fundamentals, the intent of the course is to focus on the current challenges and achievements. The course covers diverse aspects of the safety case of nuclear facilities, including but not necessarily limited by the nuclear power plants. Starting with the core question of the role of nuclear regulation, touching on the function of major international organizations, the course then will spend time delving into the key safety principles and diverse elements of the safety case, as well as the new issues and possibilities arising in the 21st century.

Instructors: A. Viktorov (CNSC), M. Modro (NINE, former at IAEA), A. Petruzzi (NINE), W. Giannotti (NINE), P. Hughes (former at IAEA)
Registration Fee: 3000 / 3200 euros (early/late registrations)

 


Digital I&C Training

 

 

 


Description:
This course provides and overview of the current issues in licensing digital systems for new reactors and existing reactor upgrades around the world that impact on plant safety margins and the economics of supply. The major elements in the course are:

   - Summary of digital system impact on safety margins

   - Experience base of digital upgrades and new reactor licensing thru IAEA, International Electrotechnical
     Commission (IEC) and country specific requirements

   - Latest issues in digital licensing that impact on safety margins and methods to improve

   - Latest issues in digital licensing that impact on the economics thru engineering delivery, licensing and
     potential delays

Instructor: T. Quinn (Technology Resources)
Registration Fee: 3000 / 3200 euros (early/late registrations)