**RSIC COMPUTER CODE PSR-064**

**1. NAME AND TITLE**

DOMINO: A General Purpose Code System for Coupling Discrete Ordinates and Monte Carlo
Radiation Transport Calculations.

**2. CONTRIBUTORS**

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

NUS Corporation, Rockville, Maryland.

The University of Wisconsin, Madison, Wisconsin.

**3. CODING LANGUAGE AND COMPUTER**

Fortran IV; IBM 360/370 (A), CDC 6400 (B), UNIVAC-1110 (C).

**4. NATURE OF PROBLEM SOLVED**

DOMINO is a general purpose code for coupling discrete ordinates (S_{n}) and Monte Carlo radiation
transport calculations. In particular, DOT calculations in r-z geometry may be coupled with MORSE
calculations of arbitrary geometric complexity. DOMINO is essentially a data processor for the
angular flux tape produced by the discrete ordinates calculation.

**5. METHOD OF SOLUTION**

DOMINO transforms the angular flux as a function of energy group, mesh interval, and discrete
angle into current and subsequently into normalized probability distributions.

**6. RESTRICTIONS OR LIMITATIONS**

The discrete ordinates calculation is limited to an r-z geometry.

DOMINO requires as input the spatial mesh, angular quadrature and number of groups used in the
discrete ordinates calculation. The surface (either top, bottom, or side) or the boundary number of the
internal disk or cylindrical surface and the direction (in, out, up, or down) must be specified.

**7. TYPICAL RUNNING TIME**

On the IBM 370/165 computer, a problem consisting of 12 groups, 5 radii, and 40 angles ran in
about one second.

**8. COMPUTER HARDWARE REQUIREMENTS**

DOMINO is operable on the IBM 360/370, CDC 6400, or UNIVAC-1110 computers.

**9. COMPUTER SOFTWARE REQUIREMENTS**

A Fortran IV compiler is required.

**10. REFERENCES**

S. J. Nathan, "Transmittal of the CDC 6400 Version of DOMINO" (October 1975).

M. B. Emmett, C. E. Burgart, T. J. Hoffman, "DOMINO, A General Purpose Code for Coupling Discrete Ordinates and Monte Carlo Radiation Transport Calculations," ORNL-4853 (July 1973).

M. M. Ragheb and B. L. McGill, "A Version of DOMINO General Purpose Code for Coupling
Discrete Ordinates and Monte Carlo Radiation Transport Calculations, for the UNIVAC-1110"
(February 1977). (For Version C only).

**11. CONTENTS OF CODE PACKAGE**

Included are the referenced documents and one (1.2MB) DOS diskette which contains the source
code and sample problem input and output.

**12. DATE OF ABSTRACT**

February 1984.

**KEYWORD: ** COUPLING, DISCRETE ORDINATES-MONTE CARLO