1. NAME AND TITLE

ADO: Aerojet Discrete Ordinates Calculational System.

Included within ADO are the One- and Two-Dimensional Codes ANISN, DOTT III, FAMORSE; with Auxiliary Routines DASH, MONDRIAN, and TAPEMAKER.

2. CONTRIBUTOR

Aerojet Nuclear Systems Company, Sacramento, California.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; UNIVAC 1108 (A) and IBM 360/370 (B).

4. NATURE OF PROBLEM SOLVED

ADO is a radiation analysis computer code collection developed in support of the NERVA nuclear rocket program. It includes the discrete ordinates/Monte Carlo coupling capability.

All of the three-dimensional point kernel and Monte Carlo codes have a common geometry routine which allows the user to prepare a single model with options for sophisticated or simple analyses at any time after the model is once checked out for errors.

5. METHOD OF SOLUTION

Monte Carlo is among the methods employed in the ADO system.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

The time required for ADO to execute depends entirely on the problem and the number of ADO routines called.

8. COMPUTER HARDWARE REQUIREMENTS

ADO is operable on the UNIVAC 1108 or the IBM 360/370 computers.

9. COMPUTER SOFTWARE REQUIREMENTS

A FORTRAN IV compiler is required.

10. REFERENCE

E. A. Warman, D. R. Rogers, B. A. Lindsey, "NERVA Radiation Analysis Computer Codes Collection, Volume III, Sample Problems, Book 1, Discrete Ordinates Codes," Engineering Operations Report, N8140R:72-0015 (April 1972).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source codes, data libraries, cross sections and sample problem input.

12. DATE OF ABSTRACT

October 1975; updated February 1983.

KEYWORDS: NEUTRON; GAMMA-RAY; DISCRETE ORDINATES; ONE-DIMENSION; TWO-DIMENSIONS; MULTIGROUP