NEA RWMC Workshop on Developing Safety Cases for Various Radioactive Waste Disposal Facilities: Needs and Challenges of RWMC Organisations
Background and context

This workshop is organised by the NEA Radioactive Waste Management Committee (RWMC) and hosted by the Nuclear and Radioactive Waste Agency (ANDR), Romania.

At the back end of the nuclear fuel cycle, implementers have the full responsibility to ensure the safety of radioactive waste management at all stages until the final disposal (all applied options). Implementers conduct thorough safety assessments which support decision making and form the core of a safety case in demonstrating safety.

A safety case is a collection of safety evidence and arguments that demonstrate the safety of a management process or facility throughout its lifetime. While the types of data, calculations and analyses are different for demonstrating safety in various waste management processes, the approach and strategies used to structure safety cases for different back-end processes have aspects in common.

Over the past decades, the RWMC has focused on deep geological disposal. Noting the importance of managing radioactive waste in a holistic and sustainable manner, the RWMC issued a Vision Statement in 2016 stating that its future work focus should extend beyond deep geological disposal. In particular, the RWMC is considering further utilising existing IGSC expertise to gather the essential technical safety information for developing other disposal facilities (near-surface or surface disposal).

The RWMC planned this workshop to better understand how the IGSC's experience on the topic of deep geological disposal and other disposal options can be shared in the development, use and communication of a safety case. The RWMC considers the IGSC experience in integrating and presenting safety evidence in a safety case, identifying and assessing the risks associated with credible scenarios, managing uncertainties, identifying improvement and corrective actions to support key decisions to developing safety cases for other disposal facilities valuable and relevant. Additionally, the RWMC aims to improve its understanding of the use and updating of safety cases during operations by obtaining additional input and information on how safety cases are being used in decision making and communicating with stakeholders at operating near-surface or surface disposal facilities.

The workshop is limited to experts concerned with the geological disposal of radioactive waste, including implementers, regulators, technical and social science researchers, and others from NEA groups working in relevant areas: RWMC, IGSC and its sub-groups, WP IDKM, RIDD, FSC.


The objectives of this workshop are:

  • to better understand how to build robust safety cases (to enhance confidence) for various disposal options and their similarities and differences;
  • to discuss the methodologies and the outcomes that can be shared among deep geological repositories and other types of disposal facilities;
  • to review current challenges and identify the activities to be initiated at the NEA to support the development of safety cases for various disposal facilities.
Programme Committee
LEINO, Jaakko (STUK, Finland) TADESSE, Rebecca (NEA)
TRONEL, Claire (ANDRA, France) STEIN, John (NEA)
RÖHLIG, Klaus-Jürgen (TUC, Germany) LEBEDEV, Vladimir (NEA)
UMEKI, Hiroyuki (NUMO, Japan) ZUIDEMA, Piet (EURAD)
DIMA, Alice Mariana (ANDR, Romania) BRUNO, Gerard (IAEA)
BAILEY, Lucy (RWM, United Kingdom)  
McCARTIN, Timothy (NRC, United States)  
Practical information

Key dates

20-22 July 2022

Planned workshop dates


The registration for the Workshop should be made by the national delegations to the OECD through the OECD CMS. The end of registration date is 3 June 2022

Poster requirements

A poster session will be held in conjunction with the workshop. In line with the workshop's stated aims, topics include experiences, research and development relevant to the safety case for various disposal options such as deep geological disposal, near-surface disposal or surface disposal.

Authors of posters are invited to inform the NEA Secretariat by email about their willingness and topics of posters by 31 March 2022.

Abstracts (300-500 words) are being solicited for the poster session. The Programme Committee will notify authors of their abstract's acceptance for the poster session.

Abstracts must be submitted to the NEA Secretariat by 31 March 2022. If an abstract is accepted by the Programme Committee, supporting documents (maximum 4 pages) must then be submitted by 3 June 2022. The supporting documents will be published in the final proceedings of the workshop.

Transportation and lodging

  • The meeting will take place at the Sheraton Bucharest Hotel (Hotel 4*) in Bucharest, Romania.
  • The Sheraton Hotel Address -  Sheraton Bucharest Hotel
    Calea Dorobanților 5-7, District 1, Bucharest, Romania, 010551
    (T) + 4 021 201 50 39 | (M) +4 0741 134 484
    • You can see the offer for Sheraton Hotel rooms in the downloads section;
    • The rooms rate include: a full American breakfast served in Avalon Restaurant, complimentary access 24 h to the Sheraton Fitness Centre (gym); Skyview Pool access, Complimentary water & coffee and tea facilities, Stretto Expresso machine available in all rooms, Wi-Fi and wired internet access available free of charge.

  • The Sheraton Bucharest Hotel is located between the city centre (4 km) and Henri Coandă International Airport (10 km, 15-min drive). Transportation information can be found here.
  • You can use also other accomodation options proposed in the download section as "Safety Case Workshop Hotel Details" (no offer)

Technical visit

Workshop participants are invited to the technical visit to Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH).

The visit programme is presented in the workshop agenda (Day 3 programme).

The site visit will take place on 22 July 2022.

Beginning of the visit: at 9:00 (transport will be provided).

End time of the site visit: 13:30-14:00.

NOTE! Participants wishing to attend the visit should submit to the NEA RWMD the following personal information by 25 June 2022:

- name and last name;

- serial and number of the participants’ passports or Identity Cards (ID);

- the name of the institution.