1. NAME AND TITLE

CASKCODES: CAPSIZE, SCOPE, AND KWIKDOSE for Shipping Cask Optimization, Dose Calculation, Parameter Evaluation, and Shielding Requirements.

CAPSIZE: Determines the Shielding Requirements, Size and Capacity of Shipping Casks.

SCOPE: Shipping Cask Optimization and Parametric Evaluation.

KWIKDOSE: Computes and Displays Dose Rate Outside a Shipping Cask.

AUXILIARY ROUTINES:

LPRINTER: Prints SCOPE Output on a Dot Matrix Printer.

2. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

Fortran 77; IBM PC.

4. NATURE OF PROBLEM SOLVED

CAPSIZE is an interactive program to rapidly determine the likely impact that proposed design objectives might have on the size and capacity of spent fuel shipping casks designed to meet those objectives.

SCOPE may be used as a conceptual design tool for the evaluation of various casks designed to carry fuel assemblies.

KWIKDOSE is a fast new interactive shielding program to compute and display a 2-dimensional table showing the total dose rate 10 feet from the centerline of a specific cask, as a function of the spent fuel's burnup and cooling time.

These programs are packaged together because: (1) they all address problems related to shipping cask design and optimization; (2) they share many of the same source files; (3) they share documentation.

5. METHOD OF SOLUTION

Given the burnup of the spent fuel, its cooling time, the thickness of the internal basket walls, the desired external dose rate, and the nominal weight limit of the loaded cask, the CAPSIZE program will determine the maximum number of PWR fuel assemblies that may be shipped in a lead-, steel-, or uranium-shielded cask meeting those objectives.

Using optimal packing arrangements and shielding requirements input by the user, SCOPE will design a cask to carry a single fuel assembly and then continue incrementing the number of assemblies until one or more of the design limits can no longer be met.

KWIKDOSE queries the user for the number of PWR fuel assemblies in a cask, the type of cask and thickness of the shield. Upon getting the necessary input, KWIKDOSE prints out the total dose rate, 10 feet from the centerline of the cask, as a function of the burnup and cooling time of the spent fuel.

6. RESTRICTIONS OR LIMITATIONS

The restrictions are subject to the shielding requirements of the shipping cask.

7. TYPICAL RUNNING TIME

Both CAPSIZE and KWIKDOSE take only a few seconds to execute interactively. SCOPE took 70 minutes for sample input 1, and about 10 minutes for sample input 2 and 3. These run times are based on an IBM PC/XT with no math co-processor.

8. COMPUTER HARDWARE REQUIREMENTS

The code runs on an IBM PC, IBM PC/XT or IBM PC/AT.

9. COMPUTER SOFTWARE REQUIREMENTS

MICROSOFT Fortran, version 3.2 or later, may be used.

10. REFERENCES

J. A. Bucholz, "CAPSIZE: A Personal Computer Program and Cross-Section Library for Determining The Shielding Requirements, Size and Capacity of Shipping Casks Subject to Various Proposed Objectives," ORNL/CSD/TM-248 (May 1987).

J. A. Bucholz, "Scoping Design Analyses for Optimized Shipping Casks Containing 1-, 2-, 3-, 5-, 7-, or 10-Year-Old PWR Spent Fuel," ORNL/CSD/TM-149 TTC-0316 (January 1983).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one SS/HD diskette which contains the sources, executables, sample input and output files plus an informative "README.1ST" file which should be reviewed.

12. DATE OF ABSTRACT

March 1988.