RSICC CODE PACKAGE CCC-711

1. NAME AND TITLE
    EASY-99: Multipurpose Activation and Transmutation Code System.

Data Library
    EAF-99: European Activation File - 1999.

2. CONTRIBUTOR
    UKAEA/EURATOM Fusion Association, Oxfordshire, United Kingdom, through the 
    OECD NEA Data Bank, Issy-les-Moulineaux, France.

3. CODING LANGUAGE AND COMPUTER
    Fortran 77 & C - IBM RS/6000, SUN, HP, Linux Intel PC (C00711MNYCP00).

4. NATURE OF PROBLEM SOLVED
    The European Activation System (EASY) is a complete tool for the calculation 
    of activation in materials exposed to neutrons. It can be used for any 
    application (fusion, transmutation, fission and accelerator) where the 
    neutron energy does not exceed 20 MeV. EASY-99 consists of the inventory 
    code FISPACT-99 and the EAF-99 file, which contains various libraries of 
    nuclear data. EASY-99 calculates the response of materials irradiated in a 
    neutron flux. 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. EASY-99 has a number of special 
    features including an uncertainty file, pathways analysis, sequential charge 
    particle contributions, pulses or continuous irradiation and gas production 
    (as daughter and emitted particle). EASY-99 is an updated version of 
    CCC-678/EASY-97. Information on EASY-99 is posted at the UKAEA web site: 
    http://www.fusion.org.uk/.

5. METHOD OF SOLUTION
    The basic equations solved by the FISPACT code are those giving the rate of 
    change of nuclide number density with time: the Bateman equation. The method 
    of solution used is basically that of Sidell, that is a numerical solution. 
    The number densities are calculated by the Taylor series expansion in a 
    modified form. 
    The European Activation File (EAF) is the collection of nuclear data that is 
    required to carry out inventory calculations of materials that have been 
    activated following exposure to neutrons. EAF-99 contains cross section data 
    of neutron-induced reactions for energies between 10 to the power of -5 eV 
    and MeV. The library contains data for targets up to and including fermium 
    (Z-100).
    The EAF-99 library contains 12468 excitations functions involving 766 
    targets from 1H to 257Fm, in the incident energy range up to 20 MeV. The 
    SYMPAL code has been used to update most of the data. A set of nine 
    different multigroup libraries are provided, available group structures are: 
    WIMS (69), GAM-II (100), XMAS (172), VITAMIN-J (175) and TRIPOLI(315). 
    Various choices of micro flux weightings are available for particular 
    application. Other data libraries are included: fission yield, ingestion and 
    inhalation indices, A2 values for the transport of radioactive material. 
    Particle emission spectra, stopping power and cross sections libraries for 
    alpha, deuteron, helium, proton and triton allow secondary charge particle 
    activation contributions to be calculated. 

6. RESTRICTIONS OR LIMITATIONS
    Having a numerical solver there is no restriction except for the limitations 
    imposed by the nuclear data which are made available to the solver. The 
    convergence of the solution is checked regularly and tested against internal 
    and user defined limits.

7. TYPICAL RUNNING TIME
    Running times are rather platforms dependent but, typically, span from tenth 
    to hundreds of seconds.

8. COMPUTER HARDWARE REQUIREMENTS
    Unix workstation: IBM RS/6000, SP2 - SUN - HP. Intel base PC running Linux.

9. COMPUTER SOFTWARE REQUIREMENTS
    Fortran and C compilers are required to build executables. The source code 
    was compiled and executed at RSICC on an IBM RS/6000 Model 590 running AIX 
    version 4.2.1 with XL Fortran 5.1.1.0 and C version 4.3. Makefiles are 
    provided for Sun, IBM, HP and Intel PC linux systems. No Windows version of 
    EASY-99 is available.

10. REFERENCES
    R. A. Forrest and J-Ch. Sublet, "FISPACT-99: User Manual," UKAEA FUS 407 
    (December 1998).
    J-Ch. Sublet, J. Kopecky, and R. A. Forrest, "EAF-99: Cross Section Library, 
    "UKAEA FUS 408 (December 1998).
    R. A. Forrest and J-Ch. Sublet, "EAF-99: Decay Data Library," UKAEA FUS 409 
    (December 1998).
    R. A. Forrest and J-Ch. Sublet, "EAF-99: Biological, Clearance and Transport 
    Libraries," UKAEA FUS 410 (December 1998).
    R.A. Forrest, "EASY-99: Overview," EDS-0 (December 1998).
    J-Ch. Sublet, J. Kopecky, R. A. Forrest, & D. Nierop, "EAF-99: REPORT File," 
    EDS-3a.
    R. A. Forrest, "FISPACT-99: Validation," EDS-2a (December 1998).

11. CONTENTS OF CODE PACKAGE
    Included is a CD-ROM with a GNU compressed Unix tar file which contains 
    scripts, source files, test cases, data libraries and documentation files. 

12. DATE OF ABSTRACT
    July 2002.

KEYWORDS: ACTIVATION; FUSION; ISOTOPE INVENTORY; WORKSTATION