1. NAME AND TITLE
TRITAC: A Three-Dimensional Transport Code For Eigenvalue Problems Using The Diffusion
Synthetic Acceleration Method
Osaka University, Japan, through the NEA Data Bank, France.
3. CODING LANGUAGE AND COMPUTER
Fortran 77; VAX 8810, ACOS-100.
4. NATURE OF PROBLEM SOLVED
TRITAC is a three-dimensional discrete ordinates transport code for solving eigenvalue problems
in reactor cores.
5. METHOD OF SOLUTION
Diffusion synthetic acceleration (DSA) is used in TRITAC to solve the eigenvalue problem in X-Y-Z geometry. DSA is applied not only to the inner iteration but also to the outer iteration. A seven-point difference scheme is used.
6. RESTRICTIONS OR LIMITATIONS
Variable dimensioning is used, so that the user can adjust the dimension of the container array
according to the problem size.
7. TYPICAL RUNNING TIME
The sample input was tested at NEA Data Bank on a Vax 8810 computer. The total time was 20
8. COMPUTER HARDWARE REQUIREMENTS
TRITAC runs on the VAX 8810 and ACOS-100 computers.
9. COMPUTER SOFTWARE REQUIREMENTS
The code was written in Fortran 77. The NEA Data Bank used the VAX Fortran (version 5.0)
under the VAX/VMS operating system.
M. Bando, T. Yamamoto, Y. Saito, T. Takeda, "Three-Dimensional Transport Calculation Method
for Eigenvalue Problems Using Diffusion Synthetic Acceleration," pp. 841-850 in Journal of Nuclear
Science and Technology, 22, (October 1985) (as included in NEA 1087/01) (August 1986).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2 MB) DOS diskette.
12. DATE OF ABSTRACT
KEYWORDS: DIFFUSION THEORY; DISCRETE ORDINATES; Sn METHOD; COMPLEX GEOMETRY