1. NAME AND TITLE

SMART/MANYCASK: A Program for Calculating Radiation Dose Rates.

2. CONTRIBUTOR

Ship Research Institute, Nuclear Ship Division, Tokyo, Japan.

3. CODING LANGUAGE AND COMPUTER

Fortran IV, Fortran 77; FACOM-M180.

4. NATURE OF PROBLEM SOLVED

SMART calculates radiation dose rate at the center of the outer cask surface. It can be applied to determine the radiation dose rate on each cask if source conditions, characteristic function, and material conditions in the bottle regions are given.

MANYCASK calculates radiation dose rate distribution in a space surrounded by many casks. If the dose rate on each cask surface can be measured, MANYCASK can be applied to predict dose spatial dose rate distribution for any case of cask configuration.

5. METHOD OF SOLUTION

SMART calculates the inner products of two vectors. One describes the energy spectrum of "effective" radiation current incident on the inner cask surface as a result of loading spent fuels in the bottle region. The other, named "characteristic function for shielding ability," describes the incident energy dependence of the dose rate response for those radiations which are transmitted through the cask wall.

MANYCASK calculates in terms of radiation dose rate at the center of each cask surface as well as three dimensional relative coordinates between each cask and the detector position and the geometry of each cask.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for SMART/MANYCASK.

8. COMPUTER HARDWARE REQUIREMENTS

SMART/MANYCASE is operable on the FACOM-M180.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran IV and Fortran 77 compiler are required.

10. REFERENCES

H. Yamakoshi, "Concept of Shielding Characteristics for Spent Fuel Shipping Casks," Nucl. Sci. and Eng., 87, 152-180 (1984).

H. Yamakoshi, "A Simple Expression for Radiation Dose Rate Distributions Around a Cylindrical Shell Source with a Finite Height," Nucl. Sci. and Eng., 88, 110-122 (1984).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one (1.2MB) DOS diskette which includes the source codes and sample problem input.

12. DATE OF ABSTRACT

February 1986.