1. NAME AND TITLE OF DATA LIBRARY

BABEL: Multi-Purpose Neutron and Gamma-Ray Cross Section Library for Fast Reactor Shielding Design.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAM

No retrieval program is included in the package.

3. CONTRIBUTORS

CNEN Casaccia, Italy, and CEA, Cadarach, France, through the NEA Data Bank, Gif-sur-Yvette, France.

4. HISTORICAL BACKGROUND AND INFORMATION

BABEL is a new multigroup neutron-library which was developed for fast reactor shielding design. The library includes a response function file which has activation data, neutron energy release data (KERMA factors), gas production data, design and experiment oriented response functions.

This scheme has been obtained with a sensitivity study based on design parameters and the effects of the energy group structure on these parameters.

5. APPLICATION OF THE DATA

The BABEL neutron multigroup scheme has been optimized to meet the needs of the deep propagation of neutrons in thick shields, steel/sodium mixtures, or in thick layers of sodium. All the major features of the minima in the steel and sodium cross sections are represented.

6. SOURCE AND SCOPE OF DATA

The BABEL multigroup data are mainly based on the ENDF/B4 files. A Cadarache version of the MCC2 code was used to generate the group cross sections.

The BABEL library includes the inelastic matrices for Fe, Cr, Ni and Na as separate elements. This allows the evaluation of the relative contributions of elastic and inelastic data in sensitivity and uncertainty analysis. Presently, 42 elements are included in the neutronic file of the BABEL library with P3 development of the scattering cross section.

The ENDF/B4 data were used with the MACK-IV code to generate KERMA factors and gas production cross sections. The neutronic data of the BABEL library were extensively tested for design configurations and in the integral experiment analysis.

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM

Not applicable.

8. DATA FORMAT AND COMPUTER

Card images; IBM 3033 (D00104I303300).

9. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for BABEL.

10. REFERENCE

V. Rado, G. Reynaud, M. Salvatores, and J. P. Trapp, "BABEL: A New Multi-Purpose Neutron and Gamma Library for Fast Reactor Shielding Design."

11. CONTENTS OF LIBRARY

Included are the referenced document and two DS/HD 3.5-in. (1.44 MB) diskettes in self-extracting compressed DOS files, which contain the BABEL cross section library, the routine to produce binary ANISN format and list elements, the source program and sample problem printed output.

12. DATE OF ABSTRACT

July 1985.