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Workshop: Credible release scenarios for nuclear-powered vessels operating in Nordic waters


5-6 October 2021
Holmen Fjordhotell, Asker outside Oslo, Norway

The Nordic countries are surrounded by large ocean areas where there is frequent traffic of foreign nuclear-powered vessels, both naval and civilian. All Nordic countries have such vessels operating in their economic zones, and some countries in their territorial waters. In addition, Norway receives visits from NATO naval nuclear-powered vessels in sheltered waters or to harbour on a regular basis. New emerging technologies and designs such as floating nuclear power plants, vessels with small modular reactors etc., are of increasing concern. Having a good understanding of the risks and hazards presented by these vessels, is an important fundament for both regulation and emergency preparedness and response.

The purpose of the NKS-B CRESCENT project is to review and update existing information and establish credible scenarios and release pathways for incidents and accidents related to nuclear-powered vessels operating in Nordic waters. The workshop will be followed up by a second workshop 23-24 November 2021 in Iceland.

Topics on the workshop
1. Introduction – National EPR arrangements and approaches to NPVs
2. Past incidents and accidents
3. Reactor designs, fuel specifications and review of available literature

Presentations will be given by the Norwegian Radiation and Nuclear Safety Authority (DSA), the Swedish Radiation Safety Authority (SSM), the Danish Emergency Management Agency (DEMA), the Icelandic Radiation Safety Authority (IRSA), the Radiation and Nuclear Safety Authority of Finland (STUK), the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), Vysus group and others.

There will be a workshop dinner in the evening on 5 October. Due to the covid-19 pandemic, it will be possible to attend the workshop by video conference.



Participants in need of accommodation are asked to book rooms independently ( Please note that the hotel has a limited number of rooms available.


Registration/Contact person

Please register your participation as soon as possible by e-mail to, preferably not later than Sunday 26 September 2021. Please note if you will participate in the workshop dinner and if you will attend the workshop physically or by video conference.e.

Contact NKS   NKS Sekretariatet
Boks 49
DK-4000 Roskilde
  Telephone +45 46 77 40 41

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