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EASY-2005: European Activation System

EASY-2005 consists of a wide range of codes, data and documentation all aimed at satisfying the objective of calculating the response of materials irradiated in a neutron flux. This new version covers a much larger energy range (0 - 60 MeV) than previous versions. It is designed to investigate fusion devices which will act as intense sources of high energy (14 MeV) neutrons and cause significant activation of the surrounding materials. Another fusion related activity is the planned materials testing in IFMIF. This is based on an accelerator and will produce neutrons with energies upto 55 MeV. Activation calculations on IFMIF can be carried out using EASY-2005.

The very general nature of the calculational method and the data libraries used for EASY-2005 mean that it is applicable (with some reservations) to all situations (e.g. fission reactors or neutron sources) where materials are exposed to neutrons below 60 MeV. EASY can be divided into two parts: library/code development tools and user tools. The former are required to develop the latter, and EASY users only need to be able to use the inventory code FISPACT and be aware of the contents of the EAF library (the data source).

The generation of the European Activation File (EAF) is carried out using the SAFEPAQ-II application; which uses as input many world-wide sources of nuclear data. These evaluated files, calculations and experimental data are used to construct a collection of cross section data for neutron-induced reactions on an extensive set of target nuclides (both stable and unstable), a set of decay data files and other data libraries required by FISPACT.

EASY-2005 is available for personal computers running Windows (98, NT4, 2000 and XP) and for UNIX workstations. It comprises the EAF-2005 nuclear data libraries, FISPACT-2005 and documentation (six UKAEA reports). For Windows users there is an additional tool - the EASY-2005 User Interface that enables FISPACT to be run, output files to be summarised, graphs plotted and the EAF data to be viewed.

A workshop dealing with data for EASY was held in Prague recently. Click here for details.

For further details, including how to upgrade from EASY-2003, contact Robin Forrest.

A handbook of activation data for all of the elements, including data for particular neutron spectra, importance diagrams, pathways and transmutation information is now available. The handbook was calculated using EASY-2003 and provides activation information without the need to run FISPACT. It may be downloaded here:

Handbook of Activation Data Calculated Using EASY-2003 (PDF file, size 8.6Mb)
M.R. Gilbert and R.A. Forrest
UKAEA report UKAEA FUS 509 (July 2004).

Online EASY-2005 documentation
The European Activation System: EASY-2005 Overview (PDF file, size 183k)
R.A. Forrest
UKAEA report UKAEA FUS 513 (January 2005).
FISPACT-2005: User manual (PDF file, size 974k)
R.A. Forrest and M.R. Gilbert
UKAEA report UKAEA FUS 514 (January 2005).
The European Activation File: EAF-2005 cross section library (PDF file, size 1.3Mb)
R.A. Forrest, J. Kopecky and J-Ch.Sublet
UKAEA report UKAEA FUS 515 (January 2005).
The European Activation File: EAF-2005 decay data library (PDF file, size 250k)
R.A. Forrest
UKAEA report UKAEA FUS 516 (January 2005).
The European Activation File: EAF-2005 biological, clearance and transport libraries (PDF file, size 206k)
R.A. Forrest
UKAEA report UKAEA FUS 517 (January 2005).
SAFEPAQ-II User manual (PDF file, size 2.9Mb)
R.A. Forrest
UKAEA report UKAEA FUS 454, Issue 6. (January 2005).

Validation of EASY-2005 using integral measurements (PDF file, size 4.5Mb)
R. A. Forrest, J. Kopecky, M. Pillon, K. Seidel, S. P. Simakov, P. Bem, M. Honusek and E. Simeckova
UKAEA report UKAEA FUS 526 (January 2006).

The report on the validation of earlier versions of EAF, EAF-2003, EAF-2001 are also available.

Validation of EASY-2005 above 20 MeV (PDF file, size 1.6Mb)
R. A. Forrest and J. Kopecky
UKAEA report UKAEA FUS 529 (May 2006).

Documentation for the earlier versions EASY-99, EASY-2001 and EASY-2003 are also available in our online Technical Documents collection.