2015 IGSC Scenario Development Workshop

    Issy-les-Moulineaux, France
    1-3 June 2015

    Background

    The scenario development process involves the collection and organisation of the important scientific and technical information necessary to assess the long-term performance or safety of radioactive waste disposal systems. The process involves the identification of the relevant features, events and processes (FEPs), the synthesis of broad models of scientific understanding, and the selection of cases to be calculation. Scenario development provides the overall framework in which the cases and their calculated consequences can be discussed, including biases or shortcomings due to omissions or lack of knowledge.

    The NEA 1999 workshop on scenario development in Madrid had the objective of reviewing the development methodologies of scenarios and their applications. Since then, scenario development approaches used has evolved considerably. To reveal the latest methodologies for scenario development, the NEA Integration Group for the Safety Case (IGSC) organised a workshop in 2015 near Paris.

    Objectives

    • provided a forum to review and discuss methods for scenario development and its contribution to the development of recent safety cases (since 1999);
    • examined the latest methods and compare their scope, consistency and function within the overall safety assessment process, based on practical experience of applications;
    • provided a basis for producing a report summarising the current status of scenario methodologies, identifying where sufficient methods exist and any outstanding problem areas.

    Format

    The workshop focused on three key topics (regulatory perspectives, national approaches and scenario completeness, comprehensiveness and sufficiency), and each one consisted of small group discussions guided by specific questions.

    Working language

    The working language of the workshop was in English.

    Registration and workshop programme

    This workshop was organised for NEA member countries only.

    Workshop proceedings

    Proceedings were published and included abstracts and presentations, conclusions and observations drawn from the workshop.

    Workshop programme committee

    Name

    Country

    Organisation

    Sylvie VOINIS (Chair)

    France

    ANDRA

    Lucy BAILEY

    United Kingdom

    NDA

    Manuel CAPOUET

    Belgium

    ONDRAF/NIRAS

    Lise GRIFFAULT

    France

    ANDRA

    Gloria KWONG

    N/A

    NEA

    Christi LEIGH

    United States

    SNL

    Hitoshi MAKINO

    Japan

    JAEA

    Abe VAN LUIK

    United States

    DOE WIPP