[kenj0418]

Simple: Just invent a rocket that runs on nuclear waste. Then you have all the fuel you need to get the rocket there. (joking)

[CHY872]

If you were to not-quite-spend all the fuel, you could use https://en.wikipedia.org/wiki/Nuclear_thermal_rocket, which coincidentally would be your best chance at getting to the Sun.

[fleitz]

http://en.wikipedia.org/wiki/Radioisotope_thermoelectric_gen...