1. NAME AND TITLE
SCORE-4: Two-Dimensional Multigroup Removal-Diffusion Shielding Code System.
BCDBIN: BCD to Binary Converter.
TAPEMAKER: Data Processor.
United Kingdom Atomic Energy Authority, Risley, Lancashire, England, through the OECD
NEA Data Bank, Gif-sur-Yvette, France.
3. CODING LANGUAGE AND COMPUTER
FORTRAN IV and Assembler language; IBM 360/370.
4. NATURE OF PROBLEM SOLVED
SCORE-4 is a two-dimensional removal diffusion code system which allows the use of inset
boundary conditions and will optionally calculate the mesh interval requirements of each shield
region. A calculation including both the radial and top shields of a fast reactor can be carried out.
The neutron flux is calculated for a shield made up of rectangular regions. The geometry is either
X-Y or R-Z.
5. METHOD OF SOLUTION
Removal fluxes and sources throughout the shield regions are calculated from a given reactor
core power distribution using a point kernel method. The diffusion neutron fluxes are obtained
from the removal source distribution using an iterative method of solution.
6. RESTRICTIONS OR LIMITATIONS
The amount of fast core required for the program depends on the size of shield being calculated. For example, a 100 by 100 mesh shielding calculation would require approximately 300 k bytes. Larger problems could be solved by increasing the fast storage requirements.
Up to 500 experimental data points with their associated error bars can be displayed. Up to 2
smooth curves may be overlayed on a display of experimental data points. Each curve is restricted
to 150 points.
7. TYPICAL RUNNING TIME
Approximately 2 hours is required on the IBM 370/165 for a whole shield calculation.
8. COMPUTER HARDWARE REQUIREMENTS
SCORE-4 was developed for ICL 4/70 and IBM 360 computers and is operable on IBM
370/165 computers. A 100 by 100 mesh shielding calculation requires approximately 300 k bytes.
9. COMPUTER SOFTWARE REQUIREMENTS
FORTRAN IV and Assembler language compilers are required.
B. L. Richardson, "A Multigroup Removal Diffusion Theory Shielding Code for X-Y and R-Z
Geometries with Inset Boundaries," Informal document.
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code, data library and sample problem input and output.
12. DATE OF ABSTRACT
August 1975; updated January 1983; revised December 1983.
KEYWORDS: NEUTRON; REMOVAL-DIFFUSION; SPINNEY METHOD; MULTIGROUP; TWO-DIMENSIONS