**1. NAME AND TITLE**

DOMINO-II: General Purpose Code System for Coupling DOT-IV Discrete Ordinates and Monte
Carlo Radiation Transport Calculations.

**AUXILIARY ROUTINES**

RANR

MORSE

PSR-64/DOMINO has been rewritten into DOMINO-II to allow processing of a DOT-IV multiple
boundary source tape.

**2. CONTRIBUTOR**

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

**3. CODING LANGUAGE AND COMPUTER**

Fortran IV; IBM 3033.

**4. NATURE OF PROBLEM SOLVED**

DOMINO-II implements the coupling of discrete ordinates (S_{n}) calculations with Monte Carlo
calculations. In particular, CCC-89/DOT calculations in r-z geometry may be coupled with CCC-127/MORSE calculations of arbitrary geometric complexity. DOMINO-II is essentially a data
processor for the angular flux tape produced by the discrete ordinates calculation.

**5. METHOD OF SOLUTION**

The discrete ordinates calculation is limited to an r-z geometry. Either the DOT boundary angular
fluxes or the angular fluxes at internal surfaces may be input to DOMINO-II. Any amount of surface
may be used in DOMINO-II; i.e., from all mesh intervals down to a portion of one interval. The
radii, axes, and quadrature set must be read into DOMINO-II. Appropriate cumulative probability
distributions are calculated from the angular fluxes and written on a tape. Four different types of tapes
may be written for use in Monte Carlo codes: upward from a disk, downward from a disk, inward
from a cylindrical surface, and outward from a cylindrical surface. DOMINO-II transforms the
angular flux as a function of energy group, mesh interval and discrete angle into current and
subsequently into normalized probability distributions. The output tape contains all necessary coupling
information for use by the Monte Carlo code.

**6. RESTRICTIONS OR LIMITATIONS**

The amount of data necessary to perform coupling may be quite large. Storage requirements for
such cases may exceed computer capacity. Therefore, only the necessary energy groups, mesh points
and angles are included in the distributions on the tape and the routines have been flexibly
dimensioned.

**7. TYPICAL RUNNING TIME**

No study has been made by RSIC of typical running times for DOMINO-II.

**8. COMPUTER HARDWARE REQUIREMENTS**

DOMINO-II is operable on the IBM 3033 computers.

**9. COMPUTER SOFTWARE REQUIREMENTS**

A Fortran IV compiler is required.

**10. REFERENCES**

M. B. Emmett, "DOMINO-II, A General Purpose Code for Coupling DOT-IV Discrete Ordinates and Monte Carlo Radiation Transport Calculations," ORNL/TM-7771 (May 1981).

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

**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, plus output from the sample problem.

**12. DATE OF ABSTRACT**

April 1984.

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