International Workshop on Dynamic Probabilistic Safety Assessment and its Role in Risk-Informed Decision Making
Key dates

Deadline for submission of abstracts       31 July 2023  (extended) 

Notification of accepted contributions      17 August 2023

Deadline for attendance registration          27 Oct 2023      

Deadline for presentation submissions     27 Oct 2023

Workshop date                                               16-17 Nov 2023

More information about the submission and registration forms is provided below.


Dynamic methodologies for probabilistic safety assessment (PSA) and risk assessment continue to advance steadily. A number of (primarily research-oriented) case studies have been published, demonstrating the additional capabilities and insights that dynamic PSA approaches can deliver, while advances in computational power and methods allow problems of increasing scale to be tackled. Recognising that both technical and organisational obstacles to the practical deployment of dynamic PSA remain, the Working Group on Risk Assessment (WGRISK) of the NEA Committee on the Safety of Nuclear Installations (CSNI) is carrying out a task to assess the potential role of currently available and emerging dynamic PSA tools and methodologies in risk-informed decision making, to identify the practical challenges for their application to support such decisions, and to evaluate the outlook for overcoming these challenges.

With these goals, the WGRISK is organising an international workshop Dynamic Probabilistic Safety Assessment and its Role in Risk-Informed Decision Making to be hosted by the US Nuclear Regulatory Commission (US NRC) in Rockville, MD, United States, on 16-17 November 2023.

Objectives and scope of the workshop

The objective of the workshop is to provide a forum to discuss topics such as:

  • experiences with the application of dynamic PSA and the use of these results by decision makers;
  • the integration of dynamic PSA results in risk-informed decision making;
  • current risk management decisions and safety issues where traditional (non-dynamic) PSA approaches have potential shortcomings;
  • the technical and organisational challenges to the practical deployment of dynamic PSA and the outlook for addressing these.

The scope of the risk and safety issues includes all scopes of nuclear power plant PSA, nuclear installations safety, the associated safety issues, and the diverse decisions made by stakeholders including licensees and regulatory bodies.

The workshop will consist of a combination of presentation sessions and panel/discussion sessions. To facilitate discussion, contributors will be asked to submit presentations prior to the workshop ( by 27 October). Workshop papers are not expected from the contributors.

Suggested topics for contributions
  • Technical challenges for practical dynamic PSA, e.g. coverage of rare events, human factor-related models, computational issues, methods to identify important insights from the vast amounts of data produced by dynamic PSA simulations.
  • Dynamic PSA decision-making cases, relating to Level 1/2/3 PSA, any plant operational modes, internal events and external hazards, as well as diverse specific concerns such as spent fuel pools, equipment recovery, portable equipment deployment, accident management, and site-level risk.
  • Experience with the use of dynamic PSA for nuclear or any other application.


Workshop Organising Committee

Michelle Gonzalez, US NRC, USA (Chair)

Tanja Eraerds, GRS, Germany (Co-Chair)

Vinh Dang, PSI, Switzerland (WGRISK Chair)

Participation and logistics

The organisers kindly invite specialists from operating organisations, regulatory authorities, vendors, design organisations, technical support organisations (TSOs), research institutes, practitioners and consultants. The workshop is open to participants from the OECD member countries and NEA member countries, strategic partners, invitees, and partner international organisations. The workshop will be enriched through the participation of:

  • PSA experts well-versed in the challenges and issues involving currently established PSA methods and tools;
  • PSA experts familiar with approaches for treating dynamic issues in the classic PSA framework;
  • PSA research and development community;
  • decision makers and stakeholders;
  • academia (universities and research centres).

In-person workshop

The event will take place at the US NRC, Rockville, MD, United States. No virtual participation is foreseen.

Call for contributions

Participants intending to present are asked to submit an abstract (300-500 words).

Deadline: 31 July 2023. Checklist and Online abstract submission form.

Authors will be notified by 17 August 2023.

Participant registration

To support efficient planning, please register early.

Deadline: 27 October 2023. Checklist and Online registration form.

If you require an invitation letter for a visa, you must register by 28 July 2023.

The workshop is free of charge for all participants.

Travel and accommodation are not provided and must be organised by the participants. A practical travel information sheet will be available on this page at a later date.

Workshop will be held in English.

All presentations and discussions will be held in English. No translation will be provided.

16 - 17 November 2023
US Nuclear Regulatory Commission, 11555 Rockville Pike, Rockville, MD 20852, United States