RSIC DATA LIBRARY DLC-151

1. NAME AND TITLE OF DATA LIBRARY

MATXS175/42-JEF87: JEF/EFF Based VITAMIN-J 175 Neutron, 42 Photon Multigroup Data 
Library in MATXS Format.


2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

BBC Computer Code for Converting Data to Binary Form and Vice Versa; available in 
PSR-206/TRANSX-CTR.


3. CONTRIBUTORS

Swiss Federal Institute For Reactor Research, WEenlingen, Switzerland, through NEA 
Data Bank, Gif-sur-Yvette Cedex, France.


4. HISTORICAL BACKGROUND AND INFORMATION

The Joint European File (JEF) is a computer-readable repository of neutron and photon 
data in the energy range up to 20 MeV. Together with the recently Evaluated Fusion 
File (EFF), it is rapidly becoming the standard European data source for thermal 
reactors, fast reactors, fusion, shielding and controlled thermonuclear analysis. 
JEF is administered by the Nuclear Energy Agency (NEA Data Bank). The file has evolved 
through several updates, the current one being called JEF-1.

Discrete ordinate transport codes that solve the Boltzmann equation for the 
distribution of neutrons and photons in nuclear systems have reached a high level of 
development. Major users of these codes demand up-to-date, documented cross section 
data as input. Therefore, new multigroup nuclear data libraries based on JEF/EFF 
were generated for general applications. For this purpose, the NJOY (6/83) nuclear 
data processing system was used.


5. APPLICATION OF THE DATA

The coupled neutron-photon multigroup library was chosen to give a fine representation 
of the fast and epithermal neutron energy for fusion blanket and shielding analysis.


6. SOURCE AND SCOPE OF DATA

The Vitamin-J 175 neutron energy group structure has the same boundaries as the 174 
group Vitamin-E (DLC-113) structure but with an additional boundary taken from the 
Vitamin-C structure at 12.84 MeV. The 42 photon energy group structure contains the 
energy boundaries of the 38 group Vitamin-E photon energy structure and the break 
points: 50, 30, 1.34 MeV, and 1 keV. The neutron ENDF data for the isotopes were 
taken from JEF-1, JEF-1.1, EFF-1, and ENDF/B-4. The original EFF-1 lead data were 
written in ENDF/B-VI and contains double differential scattering. The processed 
groupwise lead data do not include all features of the evaluated scattering laws. 
The ENDF/B-V photon interaction data were taken from the DLC-99/HUGO package, 
reconstructed with the module RECONR of NJOY (PSR-171) and put into multigroup 
form using GAMINR. 

The GENDF's of the neutron energy structure and the 42 photon energy structure have 
been put into the MATXS format. NJOY (6/83) modules have been used to combine the 
individual isotope GENDF's for all materials and to reformat the resulting GENDF 
file into MATXS format. The MATXS file is a generalized cross section library in a 
flexible format similar to the CCCC standard cross section file ISOTXS.


7. DISCUSSION OF THE DATA RETRIEVAL PROGRAMS

The program BBC from PSR-206/TRANSX-CTR converts the data from BCD to binary form 
and vice versa.


8. DATA FORMAT AND COMPUTER

Card images; VAX family of computers (D00151D881000).


9. TYPICAL RUNNING TIME

None noted.


10. REFERENCE

P. Vontobel and S. Pelloni, "JEF/EFF Based Nuclear Data Libraries," EIR-Bericht 
Nr. 636, Swiss Federal Institute for Reactor Research, WEenlingen, Switzerland, 
December 1987.


11. CONTENTS OF PACKAGE

Included are the referenced document and the data libraries. The data library is 
transmitted on one DC6150 cartridge tape in TAR format.


12. DATE OF ABSTRACT

January 1991. 


KEYWORDS: BASED ON ENDF/B-V; COUPLED NEUTRON-GAMMA-RAY CROSS SECTIONS; 
MULTIGROUP CROSS SECTIONS