1. NAME AND TITLE
ALKASYS: A Computer Program For Studies of Rankine-Cycle Space Nuclear Power
Oak Ridge National Laboratory, Oak Ridge, Tennessee.
3. CODING LANGUAGE AND COMPUTER
BASIC; IBM PC.
4. NATURE OF PROBLEM SOLVED
The program ALKASYS is used for the creation of design concepts of multimegawatt space nuclear
power systems that employ potassium Rankine power conversion cycles.
5. METHOD OF SOLUTION
ALKASYS calculates performance and design characteristics and mass estimates for the major
subsystems composing the total power system. Design and engineering performance characteristics
are determined by detailed engineering procedures rather than by empirical algorithms. Mass estimates
are developed using basic design principles augmented in some cases by empirical coefficients
determined from the literature. The reactor design is based on a fast spectrum, metallic-clad rod fuel
element containing UN pellets.
6. RESTRICTIONS OR LIMITATIONS
ALKASYS was developed primarily for the analysis of systems with electric power in the range
from 1000 to 25,000 kW(e) and full-power life from 1 to 10 years. The program should be used with
caution in systems that are limited by heat flux (which might indicate need for extended surfaces on
fuel elements) or criticality (which might indicate the need for other geometries or moderators).
7. TYPICAL RUNNING TIME
The sample case using the direct cycle took about 5 minutes on an IBM PC/XT under the DOS
8. COMPUTER HARDWARE REQUIREMENTS
IBM PC and compatibles.
9. COMPUTER SOFTWARE REQUIREMENTS
The code was written in IBM BASIC and tested under PC-DOS (IBM PC). An ASCII file
produced by the BASIC interpreter is included.
J. C. Moyers, and J. P. Nichols, "ALKASYS, A Computer Program For Studies of Rankine-Cycle
Space Nuclear Power Systems," ORNL/TM-10427 (September 1987).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (360 K) DOS diskette.
12. DATE OF ABSTRACT
KEYWORDS: MICROCOMPUTER; PARAMETRIC MODELS; SPACE NUCLEAR SYSTEMS