1. NAME AND TITLE OF DATA LIBRARY
FLUNG: Coupled 35-Group Neutron and 21-Group Gamma Ray, P3 Cross Sections for
2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS
BCBN: Converts ANISN card images to binary.
Oak Ridge National Laboratory, Oak Ridge, Tennessee.
4. HISTORICAL BACKGROUND AND INFORMATION
FLUNG (Fusion Library for Unshielded Neutron, Gamma-Ray Transport) is a 35-neutron, 21-gamma ray, P3 cross section library for 63 nuclides. It was derived from the VITAMIN-C general
purpose fine group library and is useful for the neutronic analysis of fusion reactors and other
applications. The fine energy group structure was adopted to accurately describe resonance data and
high energy (10.0-17.3 MeV) reactions. However, the fine group structure is not readily adaptable
to most radiation transport calculations because of limitations imposed on computer core storage and
running time by the code itself, geometry descriptions, angular quadrature, scattering cross section
expansions, and the multigroup description of the cross sections. Therefore, the broad group library
was created for the neutronic analysis of fusion reactors.
5. APPLICATION OF THE DATA
The 35-neutron, 21-gamma ray energy group cross section library was collapsed from the
VITAMIN C data set using the AMPX. The data were prepared in ANISN "binary" format. The
cross section data are for a P3 Legendre polynomial expansion of the scattering cross sections.
6. SOURCE AND SCOPE OF DATA
Materials included in the library are as follows:
Ni, Cr, Fe, 55Mn, 59Co, Cu, 4He, 12C, 16O, 27Al, Pb, 6Li, 7Li, 10B, 1H, 9Be, V, 11B, Ti, F, Si, Mg, K,
23Na, 14N, Mo, Nat Zr, 235U, 238U, 31P, 32S, Sn, Cl, 93Nb, 237Np, 239Pu, 182W, 183W, 184W, 186W, 181Ta,
232Th, 233U, Ca, 241Am, 238Pu, 241Pu, 3H, 3He, Zrly, 107Ag, 109Ag, Cd, Ba, 151En, 153En, 2H, 240Pu, 242Pu,
The following materials show deficiencies in gamma-ray production and/or interaction data on the
35n,21g ANISN Library:
4He, 11B, Sn, 237Np, 232Th, 233U, 241Am, 238Pu, 241Pu, 3H, 3H3, Zircaloy, 107Ag, 109Ag, Cd, 2H, 242Pu,
7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM
BCBN is included to convert ANSIN-formatted card images to binary.
8. DATA FORMAT AND COMPUTER
BCD to binary conversion; IBM 370/3033.
9. TYPICAL RUNNING TIME
BCBN runs in less than 30 cpu seconds on the IBM 3033.
R. T. Santoro, R. W. Roussin, J. M. Barnes, "FLUNG: Coupled 35-Group Neutron and 21-Group
Gamma Ray, P3 Cross Sections for Fusion Applications," ORNL/TM-7828 (June 1981).
11. CONTENTS OF LIBRARY
Included are the referenced document and one (1.2MB) DOS diskette which contains the cross
sections for fusion applications, the BCD to binary conversion program, JCL to run the BCD to binary
program, plus output from the BCD to binary conversion run.
12. DATE OF ABSTRACT
April 1985, revised June 1990.
KEYWORDS: COUPLED NEUTRON-GAMMA-RAY CROSS SECTIONS; CTR PROCESSED CROSS SECTION LIBRARY; MULTIGROUP CROSS SECTIONS; MULTIGROUP CROSS SECTIONS BASED ON ENDF/B