1. NAME AND TITLE OF DATA LIBRARY

FLUNG: Coupled 35-Group Neutron and 21-Group Gamma Ray, P₃ Cross Sections for Fusion Applications.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

BCBN: Converts ANISN card images to binary.

3. CONTRIBUTOR

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, ²³⁴U, ²³⁶U.

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, ²³⁴U, ²³⁶U.

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.

10. REFERENCE

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.