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 (Sn) 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