Ecolego is a powerful and flexible software tool for creating dynamic models and performing deterministic or probabilistic simulations. Ecolego can be used for conducting risk assessments of complex dynamic systems evolving over time with any number of species. Ecolego has specialised databases and other add-ons designed for the field of radiological risk assessment.

The graphical user interface helps the user to define and manage building blocks, parameters, species and simulation settings. Ecolego also helps to create reports, to plot simulation results, to perform probabilistic simulations and sensitivity analysis.

The parameter database toolbox provides an interface to the parameter database.

• Parameter values, probability density functions and statistics
• Lookup table values and settings
• Export data from your Ecolego project to the database
• Update parameters and lookup tables.
• List of parameter names available while writing equations
• Import parameters on-the-fly while writing equations
• Update individual parameters or lookup tables with data from the database.

The radionuclide toolbox features a database containing all nuclide isotopes and their decay constants and decay energies. It also contains the parent-daughter relationships between a radionuclide and its decay products.

When the radionuclide toolbox is used together with the ODE toolbox, Ecolego will automatically calculate ingrowth and decay for each state in the model.

• Import individual radionuclides or decay chains of radionuclides
• Browse radionuclide energies and decay chains
• Automatically handle ingrowth and radionuclide decay for state variables

The parameter database is a free product which can be set up to centralize and quality assure parameter data. Storing parameters in the parameter database assures that data is traceable and transparent.

• Stores values, time series, statistics and probability density functions.
• Attach comments, references or documents to any value.
• Tag parameter instances
• Role based user permissions make sure that users only access what they are allowed to.
• Import/export to Microsoft Excel.
• Built-in usability status ladder for quality assurance

Ecolego and its sub-products are platform independent and run on 32/64 bit Win2000/XP/Vista/7, MacOSX, Linux and Unix.

Ecolego has been sponsored by SSM, Sweden www.ssm.se and NRPA, Norway www.nrpa.no.

Eikos has been sponsored by Posiva OY https:www.posiva.fi/ and NRPA www.nrpa.no.

ECOLEGO - A toolbox for radioecological risk assessment Proceedings of the International Conference on the Protection from the Effects of Ionizing Radiation, IAEA-CN-109/80. Stockholm: International Atomic Energy Agency. 229 - 232.

Further AMBER and Ecolego Intercomparisons SKI Report 2004:05 SSI Report 2004:01

AMBER and Ecolego Intercomparisons using Calculations from SR 97 SKI Report 2003:28, SSI report 2003:11

Ekström P-A, 2005. Eikos. A Simulation Toolbox for Sensitivity Analysis. M.Sc. thesis, Uppsala University, UPTEC Report IT 05 015.

Poster (Proceedings of The 2nd International Conference on Radioactivity in the Environment, ISBN 82-90362-21-8. 2-6 October 2005 in Nice, France. 361-364.)

Ekström P-A, Broed R, 2006. Sensitivity Analysis Methods and a Biosphere Test Case Implemented in Eikos. Posiva Working Report 2006-31, 84 pp.