1. NAME AND TITLE

QUINCE: Calculates Absorbed Dose From Skin Contamination.

2. CONTRIBUTOR

Union Electric Company, St. Louis, Missouri.

3. CODING LANGUAGE AND COMPUTER

Fortran 77; IBM PC.

4. NATURE OF PROBLEM SOLVED

The program QUINCE is an enhanced version of the VARSKIN code (CCC-522) which computes absorbed dose and survival from a disc or point source on the skin surface, irradiating cells at the base of the skin.

5. METHOD OF SOLUTION

VARSKIN assumes that the dose from the last point of integration was close to zero and any remaining dose from that point was negligible. QUINCE was modified to add the dose from the last integration point out to the maximum range based on a straight line extrapolation to zero. QUINCE provides a smooth integral function by which the integrated dose is obtained, as opposed to the step function method in VARSKIN. QUINCE allows dose calculation for mixtures of up to 5 isotopes whereas VARSKIN requires separate runs for each isotope in the mixture. QUINCE prints dose averaged over a 1 square centimeter area and the new area that is selected.

6. RESTRICTIONS OR LIMITATIONS

QUINCE allows mixtures of up to 5 isotopes.

7. TYPICAL RUNNING TIME

The code is interactive. The sample input took only a few seconds on an IBM PC/XT (4.7 megahertz) running under DOS 3.3. with a math co-processor.

8. COMPUTER HARDWARE REQUIREMENTS

IBM PC and compatibles. A math coprocessor is not required.

9. COMPUTER SOFTWARE REQUIREMENTS

The code was written in Fortran 77 and tested under PC-DOS (IBM PC). An executable file produced by the MICROSOFT Fortran Version 4.01 is included.

10. REFERENCES

M. C. Williams, "Validation, Verification and Use of the Computer Software Program QUINCE for Skin Dose Calculation," informal document (1990).

M. C. Williams, "A Method For Adding Nuclides to VARSKIN and QUINCE Skin Dose Calculation Software," pp. 25­34 in Radiation Protection Management, Vol. 4, No. 6 (Nov./Dec. 1987).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (360 K) DOS diskette.

12. DATE OF ABSTRACT

October 1990.