RSICC CODE PACKAGE CCC-678
1. NAME AND TITLE
EASY-97: A Multipurpose Activation and Transmutation Code System.
2. CONTRIBUTOR
UKAEA/EURATOM Fusion Association, Oxfordshire, United Kingdom.
3. CODING LANGUAGE AND COMPUTER
FORTRAN 77 and C (UNIX Version) - IBM RS/6000, SUN, HP, Intel base PC (C00678MNYCP00).
4. NATURE OF PROBLEM SOLVED
The European Activation SYstem (EASY) is a complete tool for the calculation of activation in materials exposed to neutrons and charged particles. It can be used for any application (fusion, transmutation, fission and accelerator) where the neutron energy does not exceed 20 MeV, EASY-97 consists of the inventory code FISPACT-97 and the EAF-97 and FENDL-2.0 activation files, which contains various libraries of nuclear data. FISPACT is an inventory code that solves a set of stiff 1st order differential equations by means of a numerical method. EASY-97 is an updated version of CCC-662/EASY4.1. Information on EASY-99 is posted at the UKAEA web site: http://www.fusion.org.uk/.
The FENDL/A-2.0 library contains 13006 excitations functions involving 739 targets from 1H to 248Cm, in the incident energy range up to 20 MeV. The FENDL/D-2.0 library contains decay date for 1867 nuclides. Uniquely, an uncertainty file, FENDL- 2.0_UN is also provided. The EAF-97 Rev1 library contains 12456 excitations functions involving 766 targets from 1H to 257Fm, in the incident energy range up to 20 MeV. The EAF-97 Decay library contains decay date for 1917 nuclides. Uniquely, an uncertainty file, EAF-97_UN is also provided.
A set of four different multigroup libraries are provided, available group structures are: WIMS (69), GAM-II (100), XMAS (172) and VITAMIN-J (175). 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.
Special features: - Uncertainties
- Pathways analysis
- Sequential charge particle contributions
- Pulses or continuous irradiation
- Gas production (as daughter and emitted particle)
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.
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 Windows95 or WindowsNT.
9. COMPUTER SOFTWARE REQUIREMENTS
FORTRAN and C compilers are required to build executables. Visual Numerics PV WAVE ® visualization software is optional. The source code was compiled and executed at RSICC on an IBM RS/6000 Model 590 running AIX version 4.2.1, XL Fortran 5.1.1.0 and C version 4.3. The included PC executable created with the Salford FTN77 version 4.02 compiler was tested at RSICC on a PentiumII/266 under Windows95.
10. REFERENCES
Hardcopy:
J-Ch. Sublet and R. A. Forrest, "PC README," Informal Notes.
J-Ch. Sublet "UNIX EASY97/README" Informal Notes (February 13, 1998).
R.A. Forrest, "EASY-97: Overview," EDS-0 (June 1997).
Electronic PDF format:
R. A. Forrest and J-Ch. Sublet, "FISPACT-97: User Manual," UKAEA FUS 358 (May 1997).
J-Ch. Sublet, J. Kopecky, and R. A. Forrest, "EAF-97: Cross Section Library, "UKAEA FUS 351 (June 1997).
J-Ch. Sublet, J. A. Simpson, R. A. Forrest, J. Kopecky, and D. Nierop, "EAF-97: Cross Section Library - (n,y) Reactions," UKAEA FUS 352 (June 1997).
R. A. Forrest and J-Ch. Sublet, "EAF-97: Decay Data Library," UKAEA FUS 353.
R. A. Forrest and J-Ch. Sublet, "EAF-97: Biological and Transport Libraries," UKAEA FUS 354.
"EAF-97: Cross Section Library - (n,f) Reactions."
J-Ch. Sublet, J. Kopecky, R. A. Forrest, and D. Nierop, "EAF-97: REPORT File," EDS-3a.
R. A. Forrest, "FISPACT-97: Validation," EDS-2a.
11. CONTENTS OF CODE PACKAGE
Included are the referenced documents and one CD-ROM with a compressed Unix tar file which contains scripts, source files, test cases, data libraries and documentation files. The CD also contains a self-extracting compressed DOS file with PC executables, batch file, test cases data libraries and document files. Fortran source files are included only in the UNIX distribution.
12. DATE OF ABSTRACT
October 1999.
KEYWORDS: ACTIVATION; FUSION; ISOTOPE INVENTORY; WORKSTATION