1. NAME AND TITLE

SEECAL 2.0: Program to Calculate Age-Dependent Specific Effective Energies.

2. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

BASIC; C; FORTRAN; IBMPC (C00620/IBMPC/00).

4. NATURE OF PROBLEM SOLVED

SEECAL computes specific effective energies for any of 54 source regions and 32 target regions in the human body and for ages from newborn to adult male and adult female and for any of 825 radionuclides in the ICRP Publication 38 collection or 242 radionuclides in the Medical Internal Radiation Dose Committee (MIRD) collection. Sources and targets from the new ICRP respiratory tract model (ICRP Publication 66, 1994) are included in Version 2.0 of SEECAL, available in this package. Computation of specific effective energies is a first step in radiation dose and risk calculations.

5. METHOD OF SOLUTION

The specific effective energies are computed from equations given in ICRP Publication 56, Part 1 (1989), and ICRP Publication 60 (1991), and from databases of nuclear decay data, absorbed fractions, and region masses.

6. RESTRICTIONS OR LIMITATIONS

The present version does not address the radiations emitted in spontaneous fission.

7. TYPICAL RUNNING TIME

Running time varies from a few seconds to a few minutes, depending on the number of source and target regions, the number of age groups, and the number and complexity of radionuclides chosen.

8. COMPUTER HARDWARE REQUIREMENTS

SEECAL was designed for use on PC-compatible computers. SEECAL and associated files require about 2 MBytes on hard drive, and the nuclear decay files (see item 9) require about 7 MBytes.

9. COMPUTER SOFTWARE REQUIREMENTS

The package consists of database and computational programs, with some input selected form menus. The menuing and other user-interface routines were written in Microsoft BASIC Professional Development System (Ver. 7.1) or Microsoft C (Ver. 6) and all computational programs were written in Microsoft FORTRAN (Ver. 5.1). The data library package DLC-172 (entitled NUCDECAY, ICRP and MIRD Nuclear Decay Data), is required.

10. REFERENCES

M. Cristy and K. F. Eckerman, "Addendum" Version 2.0 information (March 27, 1995).

M. Cristy and K. F. Eckerman, "SEECAL: Program to Calculate Age-Dependent Specific Effective Energies," ORNL/TM-12351 (1993).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and an installation diskette written in self-extracting compressed DOS files for loading the executable and other files onto a PC. Source code for SEECAL is not included, but a program fragment in FORTRAN is provided for reading the SEE output files.

12. DATE OF ABSTRACT

May 1995.

KEYWORDS: INTERNAL DOSE; RADIONUCLIDES