REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188
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4. TITLE AND SUBTITLE
Cellular Repair/Misrepair Track Model

6. AUTHOR(S)
John W. Wilson and Francis A. Cucinotta

7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) NASA Langley Research Center
Hampton, VA 23665-5225

9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) National Aeronautics and Space Administration Washington, DC 20546-0001

5. FUNDING NUMBERS

WU 199-04-16-11

8. PERFORMING ORGANIZATION
REPORT NUMBER

L-16949

10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
NASA TP-3124

11. SUPPLEMENTARY NOTES

12a. DISTRIBUTION/AVAILABILITY STATEMENT 12b. DISTRIBUTION CODE

Unclassified{Unlimited

Subject Category 52

13. ABSTRACT (Maximum 200 words)
A repair/misrepair cell kinetics model is superimposed onto the track structure model of Katz to provide for a repair mechanism. The model is tested on the repair-dependent data of Yang et al. and provides an adequate description of those data. Some mechanistic ambiguities are discussed.

14. SUBJECT TERMS 15. NUMBER OF PAGES Radiation injury; Repair model; Track structure 9 16. PRICE CODE
A02
17. SECURITY CLASSIFICATION 18. SECURITY CLASSIFICATION 19. SECURITY CLASSIFICATION 20. LIMITATION OF REPORT OF THIS PAGE OF ABSTRACT OF ABSTRACT Unclassified Unclassified
NSN 7540-01-280-5500 Standard Form 298(Rev. 2-89) Prescribed by ANSI Std. Z39-18
298-102 NASA-Langley, 1993