Patent Number: 
Section: claims

1. A process comprising:inducing, with antiprotons, nuclear fission in a material, and thenmeasuring leakage of radioactive byproduct produced by the fission, and thenrepeating said inducing and then said measuring until producing, responsive to said inducing and then said measuring, a design for a nuclear fuel element. 2. The process of claim 1, further including: producing the nuclear fuel element according to the design. 3. A product produced by the process of claim 2, the product comprising the nuclear fuel element. 4. The process of claim 1, wherein said material includes depleted uranium. 5. The process of claim 1, wherein said design specifies a number of coating layers. 6. The process of claim 1, wherein said design specifies a thickness of each coating layer. 7. The process of claim 1, wherein said design specifies a composition of each coating layers. 8. A process of measuring fission daughter migration out of at least one nuclear rocket fuel element sample, the method comprising:exposing at least one sample of a nuclear rocket fuel element to antiprotons, and thenheating said at least one sample to nuclear rocket operational temperatures, and thenmeasuring the emission of fission daughters from said at least one sample. 9. The process of claim 8, wherein said at least one sample does not contain enriched uranium. 10. The process of claim 9, further including: producing, responsive to the measuring, a design for a nuclear fuel element. 11. The process of claim 10, further including: producing the nuclear fuel element according to the design. 12. A product produced by the process of claim 10, the product comprising the nuclear fuel element. 13. The process of claim 9, wherein said sample includes depleted uranium. 14. The process of claim 8, wherein said heating, exposing, and measuring take place concurrently. 15. A process comprising:inducing, with antiprotons, nuclear fission in a material to produce radioactive byproduct, and thenmeasuring leakage of the byproduct so as to produce a graphic representation of the leakage. 16. The process of claim 15, further including producing, responsive to the measuring, a design for a nuclear fuel element. 17. The process of any one of claims 1, 10, 16, wherein the producing a design for the nuclear fuel element comprises computer processing in producing the design for the nuclear fuel element. 18. Apparatus including:means for inducing, with antiprotons, nuclear fission in a material to produce radioactive byproduct; andmeans for producing a measurement of leakage of the byproduct so as to produce a graphic representation of the measured leakage. 19. The apparatus of claim 18, further including a design for a nuclear fuel element generated responsive to the measurement. 20. The apparatus of claim 18, further including a nuclear fuel element produced according to a design.