1. NAME AND TITLE
FURNACE: Code System for Neutronic Calculations in Three Dimensional Toroidal Geometry.
Stichting Energieonderzoek Centrum, Petten, Netherlands through the NEA Data Bank, Gif-sur-Yvette, France.
3. CODING LANGUAGE AND COMPUTER
Fortran IV; CDC CYBER 740
4. NATURE OF PROBLEM SOLVED
The FURNACE program system performs neutronic and photonic calculations in three dimensional toroidal geometry for application to fusion reactors. The geometry description is quite general, allowing any torus cross section and any neutron source density distribution for the plasma, as well as simple parametric representations of circular, elliptic and D-shaped tori and plasmas. The numerical method is based on an approximate transport model that produces results with sufficient accuracy for reactor-design purposes, at acceptable calculational costs. The report gives a short description of the numerical method, and a user manual for the programs of the system: FURNACE, ANISN-PT, LIBRA, TAPEMA and DRAWER.
5. METHOD OF SOLUTION
The unscattered angular fluxes inside the vessel are calculated with a ray-tracing method, then the scattered angular fluxes inside the vessel are calculated with an albedo method applying double differential albedos, and finally the scalar flux distributions in the surrounding blankets are calculated by integrating over radial flux kernels. The numerical calculations are performed in a poloidal toroidal mesh for a sector of the torus. The double differential albedos and flux kernels required are calculated with a special version of the ANISN program.
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
NEA-DB executed the test case included in this package on a CDC CYBER 740 computer. The following CPU times were required to run the different modules: 306 seconds (LIB); 9 seconds (TAPEMA); 1074 seconds (ANISNPT1); 1028 seconds (ANISNPT2); 4 seconds (LIBRA); 1750 seconds (FURNACE).
8. COMPUTER HARDWARE REQUIREMENTS
To run the test case included in this package on a CDC CYBER 740 computer, main storage requirements for the different modules are as follows: 126,100 (octal) words (LIB); 271,500 (octal) words (TAPEMA); 206,200 (octal) words (ANISNPT1); 207,962 (octal) words (ANISNPT2); 123,600 (octal) words (LIBRA); 320,000 (octal) words (FURNACE).
9. COMPUTER SOFTWARE REQUIREMENTS
FURNACE is written in FORTRAN-IV and runs under the NOS 1.4-531 operating system.
K. A. Verschuur, "FURNACE: A Toroidal Geometry Neutronic Program System Method Description and Users Manual," ECN-85-165 (October 1985).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and 1 DS/HD (1.2MB) diskette which includes source codes, sample input and output in compressed mode for DOS.
12. DATE OF ABSTRACT
KEYWORDS: ALBEDO; CTR; NEUTRON; REACTOR PHYSICS