Radiological and Nuclear Scenarios

Short Range Model

The Wind Energy department of the RISØ National Laboratory in Denmark has developed the RIMPUFF model. It ranges up to many hundred km from the source, and validation is successful through a number of experiments. The models are constantly being improved by RISØ and have a scheme for parameterization of dispersion parameters out to about 300 km from the source.


The big advantage of RIMPUFF compared to many other similar tools is that it runs fast on a standard Windows computer - instead of having to run in a supercomputer center.


ARGOS requires only input of the release points and the start time of the releases. The source term must be specified concerning both material and release rate, and the current meteorological situation for the area of interest.

Fig.: For modelling a heat lift of a release ARGOS uses the so-called chimney effect. Above is shown three simulations of the same release situation but with different chimney effect a) with no chimney effect, b) with 1 MW effect and c) 5 MW effect.


Long Range Models

The long-range atmospheric dispersion models are coupled to ARGOS in the way that they can be started remotely at the Met-Office by request directly from ARGOS. Input to a long-range model can automatically be uploaded from ARGOS to any Met-Office where they can perform several calculations on different versions of the NWP model in operational use, with various geographical coverage and resolution. Thus, an ensemble of atmospheric dispersion model results is produced for ARGOS thereby supporting the decision making process.

Fig.: Long Range dispersion results


The geographical model domain as well as the spatial resolution of a long-range model.



Urban Dispersion Model

In support for CBR scenarios to the street level in cities between buildings is ARGOS incorporates an Urban Dispersion Model (URD).


URD is developed in a cooperation between RISØ National Laboratory, Danish Mete-orological Institute (DMI) and Swedish Defence Research (FOI). At the local scale, the results of a release between buildings will be very different that if no building where present.

Fig.: ARGOS using the URD module for a simulation in Copenhagen.


With the 3D GIS module in ARGOS you can make a 3D animation that shows how the Puffs move in the Urban environment in between the houses. The major advantage in this is to understand the prognosis and to support situation awareness.


ARGOS can bring in all buildings for a country, and then feed in the relevant building to the area of interest for the URD model and the 3D views.



  • ARGOS supports the emergency organization to make the best possible decisions in case of a CBRN incident.
  • ARGOS provides situation awareness, overview, visibility and insights.
  • ARGOS provides input for proper dimensioning the emergency response organization
  • By running an ARGOS prognosis, you can give early information about how the situation will evolve.