RSICC CODE PACKAGE CCC-735
1. NAME AND TITLE
EASY-2003: European Activation Code System.
DATA LIBRARIES
· The complete EAF-2003 data library.
· The complete EAF-2001 data library.
· The FENDL-2 data library.
2. CONTRIBUTORS
EURATOM/UKAEA Fusion Association, Oxfordshire, United Kingdom, and CEA Cadarache, CEDEX, France, through the OECD NEA Data Bank, Issy-les-Moulineaux, France.
3. CODING LANGUAGE AND COMPUTER
Fortran and C; PC, IBM RS/6000, Sun, Compaq Alpha. RSICC ID is C00735MNYCP00. (NEADB identifier is NEA-1564/08 for Unix/Linux and NEA-1564/09 for Windows.)
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-2003 consists of the inventory code FISPACT-2003, the EAF-2001, EAF-2003 and the FENDL-2 data libraries. FISPACT is an inventory code that has been developed for neutron-induced activation calculations for materials in fusion devices.
EAF contains cross section data of neutron-induced reactions for energies between 1.0E-5 eV and 20 MeV. The library contains data for targets up to and including fermium (Z-100). The EAF-2003 library contains 12617 excitation functions involving 774 different targets from H-1 to Fm-257, in the incident energy range up to 20 MeV. EAF-2003 contains the following data libraries:
§ EAF_XS-2003 is the point-wise cross section library. Data on 12,617 cross sections on 774 targets are held in a modified ENDF/B format. All nuclides with a half-life of greater than 0.5 day have cross section data, but in addition some short-lived nuclides are also treated as targets. The cross sections represent targets that are infinitely dilute, no self-shielding is included and the temperature for Doppler broadening is 300K.
§ EAF_GXS-2003 is a set of multi-group libraries; the available group structures are: WIMS (69), GAM-II (100), XMAS (172), VITAMIN-J (175) and TRIPOLI (315). Various choices of micro-flux weighting are available for particular applications.
§ EAF_UN-2003 contains uncertainty data for all cross sections. This library, in modified ENDF/B-6 format, contains error factor values (in 1 to 3 energy groups) for all reactions and is unique amongst activation libraries.
§ EAF_DEC-2003 contains decay data information for 1917 nuclides, it is based primarily on the JEF-2.2 radioactive decay data library [9], with additional data from recent UK evaluations. It includes data on half-lives, decay modes and decay energies. Note that entries are included for all stable nuclides.
§ EAF_FIS-2003 is taken completely from the JEF-2.2 fission yield library. It is a library of independent fission yields in ENDF/B-6 format.
§ EAF_HAZ-2003 is a library of values for each radionuclide describing the potential biological impact of that nuclide on human beings. The format is not ENDF/B-6, but is suitable for input by the FISPACT code.
§ EAF_A2-2003 is a library of values relevant for the transport of radionuclides in shielded flasks. The format is not ENDF/B-6, but is suitable for input by the FISPACT code. Transport of radioactive material from place to place is governed by regulations set up by the IAEA.
§ EAF_CLEAR-2003 is a library of values relevant for the disposal of radioactive material. The format is not ENDF/B-6, but is suitable for input by the FISPACT code.
§ EAF_STOP is one of the data libraries assembled by FZK Karlsruhe to enable the effect of sequential charged particle reactions to be investigated.
§ EAF_XS contains the cross section data for (n,x) reactions, while EAF_SPEC describes the energy distribution of the charged particles emitted in these reactions.
§ EAF_XN describes the cross sections of p, d, h, t and alpha particles on 745 targets. Seven reactions types are considered: (p,n), (d,n), (h,n), (t,n), (alpha,n), (d,2n) and (t,2n).
§ EAF_ABS contains the photon mass energy attenuation coefficient (mu/rho) for all the elements Z= 1 - 100 in increasing Z order.
5. METHOD OF SOLUTION
FISPACT is an inventory code developed for neutron-induced activation calculations for materials in fusion devices. The current version is FISPACT-2003, which is the culmination of seventeen years of development. It uses external libraries of nuclear data for all relevant nuclides to calculate the number of atoms of each species at a specified time during the irradiation or after a decay time following shutdown. The various species are formed either by a direct reaction on a starting material, by a series of reactions some of which can be on radioactive targets or by a decay or series of decays. The accuracy of the calculated inventory is dependent on the quality of the input nuclear data - the cross sections and decay properties - the European Activation File (EAF) is the recommended source of data.
SAFEPAQ-II is the software tool used for the maintenance and development of the EAF nuclear data library by UKAEA. The SYMPAL processing system that originated at ECN Petten was used for cross section library processing prior to EAF-2001.
6. RESTRICTIONS OR LIMITATIONS
None noted.
7. TYPICAL RUNNING TIME
Run times vary. Test cases completed in approximately 15 minutes.
8. COMPUTER HARDWARE REQUIREMENTS
EASY runs on Pentium computers running Microsoft Windows or Linux and on IBM RS/6000, Alpha and Sun workstations.
9. COMPUTER SOFTWARE REQUIREMENTS
Executables created by the developers are included for IBM-AIX, Compaq-ALPHA, SUN-Solaris, Pentium running Red Hat Linux and Windows. The included Windows executable was run at RSICC on Pentium IV computers running Windows2000 and Windows XP, and the Linux executable was run on an AMD Opteron under Red Hat Enterprise Linux. Fortran 77 source files and Makefiles are in the Unix/Linux distribution but are not included in the Windows distribution.
10. REFERENCES:
10.a included in Windows and Unix distribution in electronic files and in c735.pdf:
§ R.A Forrest, “The European Activation System: EASY-2003: Overview,” UKAEA FUS 484 (1, December. 2002).
§ R.A. Forrest, “FISPACT-2003: User Manual,” UKAEA FUS 485 (1, December 2002).
§ R.A. Forrest, J Kopecky and J-Ch. Sublet, “The European Activation File: EAF-2003 Cross Section Library,” UKAEA FUS 486 (1, December 2002).
§ R.A. Forrest, “The European Activation File: EAF-2003 Decay Data Library,” UKAEA FUS 487 (1, December 2002).
§ R.A. Forrest, “The European Activation File: EAF-2003 Biological, Clearance and Transport Libraries,” UKAEA FUS 488 (1, December. 2002).
§ R.A. Forrest, “SAFEPAQ-II: User Manual,” UKAEA FUS 454 (5, December 2002)
10.b included in directory documents_2001 in Windows distribution
§ J-Ch Sublet, J. Kopecky and RA. Forrest, “EAF-99: Report File,” (EDS-3a)
§ R.A Forrest, “The European Activation System: EASY-2001: Overview,” UKAEA FUS 449 (1, March 2001).
§ R.A. Forrest, “FISPACT-2001: User Manual,” UKAEA FUS 450 (2, December 2001).
§ R.A. Forrest and J Kopecky, “The European Activation File: EAF-2001 Cross Section Library,” UKAEA FUS 451 (2, December 2001).
§ R.A. Forrest, “The European Activation File: EAF-2001 Decay Data Library,” UKAEA FUS 452 (1, March 2001).
§ R.A. Forrest, “The European Activation File: EAF-2001 Biological, Clearance and Transport Libraries,” UKAEA FUS 453 (1, March 2001).
11. CONTENTS OF CODE PACKAGE
The package is transmitted on 2 CDs which contain the reports listed above, and executable files for all systems named above, source codes, Windows installer, data files and test cases.
12. DATE OF ABSTRACT
May 2007.
KEYWORDS: ACTIVATION; FUSION; ISOTOPE INVENTORY; CROSS SECTIONS