RSICC CODE PACKAGE PSR-539
1. NAME AND TITLE
CALENDF-2005: Pointwise, Multigroup Neutron Cross-Sections and Probability Tables from ENDF/B Evaluations.
2. CONTRIBUTORS
CEA, DEN/DER/SPRC, 13108 Saint Paul lez Durance Cedex, France, and CEA, DEN/DM2S/SERMA, 91191 Gif Sur Yvette Cedex, France, through the Nuclear Energy Agency Data Bank, Issy-les-Moulineaux, France.
3. CODING LANGUAGE AND COMPUTER
Fortran95; PC; IBM RS/6000; Sun; and MAC (P00539MNYCP00).
4. NATURE OF PROBLEM SOLVED
The CALENDF Nuclear Data Processing System is used to convert the evaluation defining the cross-section in ENDF format (i.e. the pointwise cross-sections and/or the resonance parameters, both resolved and unresolved) into forms useful for applications. Those forms used to describe neutron cross-section fluctuations correspond to "cross-section probability tables", based on Gauss quadratures and effective cross-sections. CALENDF also provides capabilities for group collapsing, for merging of several nuclei and for temperature interpolation; these calculations are based on data probability table description.
CALENDF represents a Fortran-95 update of the 2002 code distribution with emphasize on programming quality and standard, physics and usage improvements. CALENDF consists of a set of modules, each performing a well-defined processing task. Each of these modules is essentially a separate computer program linked together by input and output files and some common constants. Devised to process multigroup cross-sections it relies on GAUSS quadratures mathematical principle and strength. The following processes can be handled by the code:
- moment probability tables and effective cross-sections calculation
- probability table condensation
- probability table mix for several isotopes
- probability table interpolation
- effective cross section calculation based on probability table calculations
- probability table calculations from effective cross-sections
- effective cross-section comparison
- complete energy pointwise cross-section processing
- thickness dependant averaged transmission sample calculation.
5. METHOD OF SOLUTION
Due to the diversity of the calculations, several physical modelling and numerical techniques or algorithms are used, including:
- the use of stratified sampling for random resonance parameter generation (in the unresolved resonance range)
- the use of improved Multi-Niveau Breit and Wigner (MNBW # MLBW) approximation when it is valid
- the use Reich-Moore (RM) method, when the MLBW approximation is not valid
- the calculation of probability tables which are, in fact, Gauss quadrature tables
- the use of Padé approximants and Gauss quadratures for various computations
- the cubic interpolation.
6. RESTRICTIONS OR LIMITATIONS
- No limitation on the size of the pointwise or multigroup energy mesh.
- All the defaulted dimensions or options can be modified by the users.
- The only limitation of the present version of CALENDF (CALENDF-2005) is the fact that the various partial cross sections are collapsed into five main groups of cross sections. This number could be extended in forthcoming version.
7. TYPICAL RUNNING TIME
For calculations starting from evaluations, the computing time depends greatly on the evaluation, on the required accuracy and on the group mesh chosen. All 27 test cases ran in about 20 minutes on a Pentium M 1.7 Ghz.
8. COMPUTER HARDWARE REQUIREMENTS
CALENDF-2005 runs on Personal Computers and IBM RS/6000, Sun and Mac OSX. Around 300 Mb of disk space and a few Mb of computer memory at run time.
9. COMPUTER SOFTWARE REQUIREMENTS
Fortran compiler FFLAGS for normal, full debugging and fast execution are provided for each compiler and platforms. Older Fortran compiler releases, on all platforms, are generally not supported.
NEA-1278/04: (Unix/Linux version)
Tested at the CEA on the following platforms:
- SUNBlade 2500 1.6 GHz, Solaris 10 Sparc and Studio 10 Fortran 77/95 Compiler
- IBM 44-P 375 MHz, AIX 4.3 and Xlf Fortran Compiler 7.1
- SUN Ultra 20 AMD 64 2.2 GHZ, Solaris 10 i86 and Studio ll Fortran 77/95 Compiler
- Pentium M 1.7 GHz, Linux Fedora Core 3 release 2.6.12 and Lahey/Futjitsu Fortran 95 Release L6.20d
- PowerBook G4,Os X 10.4.6 and g95 4.01 Jan 2006
- MacBook lntel Core Duo, 0s 10.4.8 and Intel Fortran Compiler v.9.1
NEA-1278/05: (Windows version)
Tested at the CEA on the following platforms:
- Pentium M 1.7 GHz, Window XP and Lahey/Futjitsu Fortran 95 Release 5.7
10. REFERENCES
JC Sublet, P Ribon, and M Coste-Delclaux, “CALENDF-2005 : User Manual,” CEA-R-6131, ISSN 0429-3460 (November 2006).
JC Sublet, C Dean, and D Plisson-Rieunier, “ECCOLIB-JEFF-3.1 Libraries,” CEA-R-6100, ISSN 0429-3460 (2006).
C Jouanne and JC Sublet, “TRIPOLI-4.4 JEFF-3.1 Based Libraries,” CEA-R-6125, ISSN 0429-3460 (2006).
JC Sublet, P Ribon, “Current Status of CALENDF-2005,” Wonder 2006.
11. CONTENTS OF CODE PACKAGE
Included are the referenced documents listed above and a CD which includes source codes, executables, Makefiles, and test cases. The Unix/Linux version is distributed in a tar file and the Windows version in a WinZIP file.
12. DATE OF ABSTRACT
July 2007.
KEYWORDS: ENDF/B-VI; ENDF FORMAT; MULTIGROUP CROSS SECTION PROCESSING; NEUTRON CROSS SECTION PROCESSING; R-MATRIX THEORY; RESONANCES.